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Agora, Inc. (API) Q1 2021 Earnings Call Transcript

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API earnings call for the period ending March 31, 2021.

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Agora, Inc. (API -2.66%)
Q1 2021 Earnings Call
May 24, 2021, 9:00 p.m. ET


  • Prepared Remarks
  • Questions and Answers
  • Call Participants

Prepared Remarks:


Good day, and thank you for standing by. Welcome to Agora, Inc. first-quarter 2021 financial results. At this time, all participants are in a listen-only mode.

After the speakers' presentation, there will be a question-and-answer session. [Operator instructions] Please be advised that today's conference is being recorded. [Operator instructions] I would now like to hand the conference over to our first speaker today, Ms. Fionna Chen.

Thank you. Please go ahead.

Fionna Chen -- Head of Investor Relations

Thank you, operator. Good evening, and good morning, everyone. My name is Fionna Chen. I'm the investor relations director at Agora.

Thank you for joining Agora's first-quarter 2021 earnings conference call. Joining me today are Tony Zhao, founder, chairman, and CEO; and Jingbo Wang, CFO. Our earnings results press release and a slide deck can be found on our IR website at Reconciliations between our GAAP and the non-GAAP results can be found in our earnings press release.

During this call, we will make forward-looking statements about our future financial performance and other future events and trends, including guidance. These statements are only predictions that are based on what we believe today, and actual results may differ materially. These forward-looking statements are subject to risks, uncertainties, assumptions, and other factors that could affect our financial results and the performance of our business. We will discuss them in details in our filings with the SEC, including today's earnings press release and risk factors and other information contained in the final prospectus relating to our initial public offering.

Agora assumes no obligation to update any forward-looking statements we may make on today's call. With that, let me turn it over to Tony. Tony, please?

Tony Zhao -- Founder, Chairman, and Chief Executive Officer

Thanks, Fionna, and welcome, everyone, to our earnings call. I would like to start by saying that our hearts and thoughts are with the people in India and other parts of the world dealing with the current pandemic. Some of our own Agora team members and their families were affected. But together, we will help each other through this difficult period.

The world has changed. Everyone is looking for a way to stay connected to their loved ones. Through our real-time engagement platform, Agora is committed to making this meaningful human connection possible. Thanks, Fionna, and welcome, everyone, to our earnings call.

I would like to start by seeing that our hearts and thoughts of these people in India and other parts of the world, dealing with the current pandemic. Some of our own Agora team members and their families were affected. But together, we will help each other through this difficult period. The world has changed.

Everyone is looking for a way to stay connected to their loved ones. Through our real-time engagement platform, Agora is committed to making this meaningful human connection possible. With that said, let's talk about Agora's performance for Q1 2021. We had another quarter of strong growth in Q1 2021, as developers and innovators around the world continue to create new, immersive engagement experience with our real-time voice, video, chat, and streaming products, transforming all industries.

In this quarter, the amount of real-time voice and video engagements powered by Agora exceeded 50 billion minutes per month for the first time. As we watch the bloom of innovative new use cases built with Agora over the past year, it is clear that the world is evolving from a consumer economy and knowledge economy toward a creator economy, where people make a living by sharing their skills, hobbies, and interests online. These creators include foreign language teachers, yoga instructors, tutor guides -- tour guides, chefs, DJs, musicians, and many more. Increasingly, these creators are leveraging the Internet and the power of Agora's real-time engagement network to enable those experiences and engage with their audience.

For example, we recently partnered with a virtual tour platform in Europe to enable tour guys to serve customers from thousands of miles away. Here, tourists can join the live streaming -- live-streamed tour, where local guys introduce the destination and share the sites and culture according to tourists' interests through real-time interactions. And all of those happens right in the tourists' living room. Another example is an education platform based in San Francisco that enables artists to teach each other -- to teach other creative skills, such as how to DJ through VR.

We believe these examples are just the beginning of the creator economy. We will continue to invest R&D efforts to reduce the friction for more and more creators to engage with their audience. On the enterprise side, real-time engagement has evolved far beyond video conferencing with so many aspects of business forced online to avoid total shutdown. The speed of digital transformation for enterprise has accelerated.

For example, house closings and notarization that used to require in-person meetings can now be performed by services like, which use Agora's RTE platform to provide verification and enablement services to legal and financial providers. With a powerful combination of AR and real-time video, our partner, Wipro, developed the solution that enabled real-time expert consultation for a wide range of enterprise customers from medicine to manufacturing, having seen the benefit of RTE-driven digital transformation. Enterprise will continue to innovate and leverage RTE platform to increase productivity and customer engagement. Another example of RTE innovation is XR or extended reality.

Just two weeks ago, we announced our partnership with HTC at ViveCon. When they announced their latest VR headset for enterprise, the HTC and Agora partnership will enable not just real-time interactions between VR devices but also XR live streaming, which allows users to share in the same immersive experience on any device without requiring a VR headset, making the VR experience more accessible, productive and enjoyable for all participants. We feel strongly that XR, coupled with real-time engagement, will drive the next generation of workplace collaboration. In particular, I'm excited about the potential of XR live streaming because it enables seamless connection between the real world and the metaverse or virtual world and between different metaverse, all through the power of Agora network.

On the product side, we recently released Agora SDK 3.4, which is packed with many important technical enhancements, especially on video fluency. By video fluency, we mean a stable frame rate, low jitter, and solid audio/video sync that must be in place for the session to be as natural and disruption-free as live in-person conversation. In the past, most people believed one can either have good fluency with multiple-second latency or sub-second latency with poor fluency but not good fluency and sub-second latency at the same time. This is because sub-second latency means the playback buffer is extremely small, making the playback more prone to jitter.

Through our end-to-end engineering improvements and adaptive transmission strategies, I'm extremely proud to say that we are now able to achieve sub-second latency while maintaining the same fluency compared to traditional long latency content delivery technology, such as CDN. This is an important milestone because it removes needs for our customer to make trade-offs between interactivity and video quality. Recently, this technology enabled a major education customer to deliver live lecture with excellent video quality to thousands of students in one classroom while keeping the ability to interact with each other at any time. Here, I invite developers around the world to try our latest SDK to see for yourself.

In addition to the core voice and video APIs, we have added chat and whiteboard APIs to our platform through the acquisition of Easemob and Netless. We have now completed post-acquisition integration for the China market, and the integration effort for U.S. and other markets are well under way. I'm looking forward to supercharging Agora's global developer community with our combined offering.

So first, more innovation on Agora platform. We launched the Agora start-up program this year to empower global start-ups with exclusive back-end support and benefits like free minutes and direct access to VCs and accelerators. The program has gained tremendous traction in the first quarter with 96 accelerators, incubators, and investment partners globally. I would like to invite our founders with big ideas to join the program and let us help you pursue your dream.

Lastly, I would like to take the opportunity to thank our customers and our developer community for their innovation and passion to how people stay connected. I also want to say thank you to all the Agorans for their hard work and dedication to our customers' success. The first quarter was a great start to the year, and I'm very excited about all the opportunities in front of us as we continue to help build the future of real-time engagement. Now let me turn things over to Jingbo, who will review our financial results.

Jingbo Wang -- Chief Financial Officer

Thank you, Tony. Hello, everyone. Let me start by reviewing financial results for Q1, and then I will discuss our outlook for the full year. Total revenues grew 13% year over year and 21% quarter over quarter to $40.2 million in the first quarter of 2021.

Number of active customers reached more than 2,300, excluding those for Easemob, up 98% year over year. The growth in revenue and the customers was driven by the continued adoption of our technology by developers and the emergence and growth of new use cases. We reached more than 300,000 registered app accounts at the end of March, excluding those for Easemob, adding about 11,000 per month in the quarter. We also saw significant usage growth from use cases, such as interactive lecture hall and audio live cast during the quarter.

Additionally, Easemob contributed approximately $1 million to our top line. As we mentioned in our last earnings call, in order to help investors better understand organic growth, excluding the impact from one-off events, such as the complete lockdown in China in the first half of 2020 due to COVID-19, we calculated adjusted total revenues for these periods. When comparing to adjusted total revenues in Q1 last year, our revenue grew 81% year over year in this quarter. Our trailing 12 months constant currency dollar-based net expansion rate is 131%, excluding Easemob.

If we use adjusted total revenues, the expansion rate would be 146%. Moving on to cost and expenses. For my following comments, I will focus on non-GAAP results, which exclude share-based compensation expense, acquisition-related expenses, amortization expense of acquired intangible assets, and income tax related to acquired intangible assets. Please note that a significant portion of the consideration paid or payable to the management team and employees of Easemob and Netless is accounted for as a acquisition-related expense in our income statement under U.S.

GAAP. Non-GAAP gross margin for the first quarter was 58.4%, which was 10.7% lower than Q1 last year and 2.1% lower than Q4 last year. This was mainly due to the strong growth in new international markets that we are expanding into, where infrastructure costs are higher. In addition, we continued to expand our capacity around the world in anticipation of future growth driven by the accelerated digital transformation worldwide, which led to higher depreciation of 4.7% revenue in this quarter compared to 2.1% in Q1 last year.

Non-GAAP R&D expenses were $17.4 million in Q1, up 65% year over year, as we continued to hire talented employees and strengthened our R&D team. Non-GAAP R&D expense was 43.3% of total revenue in the quarter compared to 29.7% in Q1 last year. Here, our strategy is to focus on long-term growth opportunities and innovation instead of maximizing short-term profitability. We intend to continue to invest significant resources, you know, in our R&D capabilities in order to further strengthen our technology leadership and provide a more diverse product portfolio to develop around the world.

Non-GAAP sales and marketing expenses were $7.5 million in Q1, up 38% year over year, mainly attributable to team expansion and increased advertising and event expenses. Sales and marketing expenses represented 18.6% of total revenues in the quarter compared to 15.3% in Q1 last year. Non-GAAP G&A expenses were $4.5 million in Q1, up 67.7% year over year, mainly due to team expansion and professional service fees. G&A expenses represented 11.1% of total revenues in the quarter compared to 7.6% in Q1 last year.

Non-GAAP operating loss was $5.6 million, translating to a 13.9% non-GAAP operating loss margin for the quarter compared to operating loss margin of 14.4% in Q4 last year and an operating income margin of 16.6% in Q1 last year. Turning to cash flow. Our operating cash flow was negative $2.7 million in Q1 compared to negative $0.9 million last year. Free cash flow was negative $8 million compared to negative $3.4 million last year.

Net cash outflow in the quarter was mainly due to capital expenditure as we continued to scale our network and the consideration paid for Netless acquisition. Moving on to balance sheet. We ended Q1 with $877 million in cash, cash equivalents, and short-term investments, compared to $635 million at the end of last year. The increase was primarily due to the proceeds from a $250 million private placement of ordinary shares.

Now turning to guidance. COVID-19 is new and unprecedented variable to our business model, where historical experience may not apply. Our guidance on full-year revenues reflects a number of assumptions that are subject to change based on uncertainties related to the impact of the COVID-19 pandemic. With that, for the full-year 2021, we maintain our previous guidance that total revenues for the full year are expected to be in the range of $178 million to $182 million.

In closing, we delivered a very strong first quarter of the year, thank you to the entire Agora team, our developers, customers, and investors, and hope you are healthy and safe. Let's open it up for questions.

Questions & Answers:


[Operator instructions] Our first question comes from the line of Yang Liu from Morgan Stanley. Please ask your question.

Yang Liu -- Morgan Stanley -- Analyst

Thank you for the opportunity. I have three questions here. The first is on the education regulation. We noticed that there are a lot of noises in the market that some of your customers could be subject to new regulations on their customer acquisition or their content, etc.

And based on your discussion, ongoing discussion with your customers, what should be the expected impact from these regulation changes? And also, what is revenue from this sector in the past quarter? The second question is, how will -- how should we look at the gross margin? In the recent quarter, it was 58%. And what should be the outlook for the full year? And what will drive the potential stabilization and turnaround of the gross margin? And the third question is, with the intensifying competition from public cloud and other smaller players, what is the recent competitive dynamic in the market?

Tony Zhao -- Founder, Chairman, and Chief Executive Officer

Yes. I'll take the first question. I think it's very hard to talk about impact from the regulations at this point. The government is still drafting more details of the new regulations and consulting with various stakeholders in the education industry.

It is unclear what the final regulation will look like and at what pace the government will enforce the new rules. Meanwhile, besides those regulations being discussed, I think the government has made clear that they are trying to promote the so-called free classroom initiative, which is leaning toward leveraging more online classroom services to help improve the overall education services. Therefore, we think, no matter how regulatory change would happen, the overall public and private sector use cases for online education should continue to grow. If we think in long term, I can also offer a few more perspectives.

I think, one, the overall education system, based on merit and exams, is unlikely to change, which means the demand for off-school tutoring is hard to diminish. And the shift from offline to online is likely to continue given the convenience and cost advantage of the online. Then the shift from one-way broadcasting to interactive class is likely to accelerate, given the better experience and learning outcome of interactive class. Who -- as to who will organize and provide the actual tutoring service, whether it's education companies or public schools or even individual teachers? I think this is, you know, something which will depend on the new regulations.

For us, we will just continue to focus on the things that will not change, which is more and more and better experience with, you know, online classroom solutions. And we will be dedicated to trying to provide the best of such online classroom solutions for all education providers.

Jingbo Wang -- Chief Financial Officer

And just to add, in Q1, education sector contributed about 35% of total revenue.

Tony Zhao -- Founder, Chairman, and Chief Executive Officer

The margin?

Jingbo Wang -- Chief Financial Officer

OK, the second question. So on the gross margin, there are a few factors at play here. On the one hand, we are continuing to optimize our income and cost and our technology architecture. On the other hand, global expansion and things like -- initiatives like start-up program will incur additional cost.

So on balance, we expect gross margin to remain relatively stable in the coming quarters. With that said, I want to highlight that we believe we are still in the early days of real-time engagement technology. Use cases, geographies, cost structure are all changing very rapidly, which means gross margin will fluctuate from quarter to quarter. At this stage, we are more focused on expanding our scale and use cases.

We think that as long as we keep innovating and delivering high-quality products, there's no reason to worry about our margin in the long term.

Tony Zhao -- Founder, Chairman, and Chief Executive Officer

The third question is about intensifying competition from public cloud and other small players. We think the completion with public clouds and start-ups has been happening for many years, I think, you know, in very early days, four, five years ago, you know, when some of those giant public cloud companies started to offer similar products or APIs in trying to compete with us. And the competition is naturally going to strengthen as the market grows or the industry grows. You know, the competition we are seeing in the market today is not really out of the ordinary.

You know, it's just a natural development of the growing market. For us, you know, as the industry progresses and completion grows, we will just continue to stay focused on the needs from developers, customers and create value for them. We will also focus on product and technology innovations so as to provide a better and professional offerings to all of our personal customer base. As I mentioned in my opening remarks, our interactive live-streaming product can now achieve sub-second latency with video fluency same as long latency technologies such as CDN.

This kind of breakthrough is innovation that helps us with competition, and we will continue to roll out more products like this.

Yang Liu -- Morgan Stanley -- Analyst

Thank you. May I -- just a follow-up in terms of global revenue contribution. We know this will be a little bit negative for gross margin, but definitely, it's a huge market opportunity for Agora. Could you please update us in terms of the revenue contribution from global market outside China? Thank you.

Jingbo Wang -- Chief Financial Officer

In Q1, revenue contribution from U.S. and other international markets was about 27% to 28% of total revenues.

Yang Liu -- Morgan Stanley -- Analyst

Thank you.


Our next question comes from the line of Emerson Chan from BofA Securities. Please ask your question.

Emerson Chan -- Bank of America Merrill Lynch -- Analyst

Hi. Thank you, management. I have three questions. My first question is a follow-up on the regulation on the education market.

Given the unclear regulatory outlook, I wonder what assumptions on the regulatory impact we built into our full-year revenue guidance? And also, there's a narrative that regulation on education will favor those market leaders. I just want to understand what will be the impact to us if customers are getting bigger or in case market is consolidating. Will they be more incentivized to do it in-house or look for cheaper alternatives? This is my first question. My second question is related to R&D investment, given our R&D costs increased quite a bit in Q1.

So could management give us more color on the trend of R&D spending relative to revenue in this year? And what areas of R&D we are investing? Also, when do we expect these investments translate into growth in the future? My last question is how we can increase our customer stickiness, given I noticed that we have more than 2,300 active customers now. We also provide some start-up program to increase our RTE adoption. So apart from our technology leadership, what value or features we are providing that can increase the stickiness of our customers? I just wonder if there's anything that our competitors are unable to offer so that our customers will stay with our platform. Thank you.

Jingbo Wang -- Chief Financial Officer

Sure. In terms of the assumption under the guidance, I would say, for education sector, we are assuming a modest tightening in regulations, and we have revised our revenue growth rate downward accordingly. We are not assuming a very drastic change in the entire industry. So on the customer consolidation point -- 

Tony Zhao -- Founder, Chairman, and Chief Executive Officer

Right. On that part, I think in a period of time, customer consolidation in education might more or less, you know, change the composition of our education customer base. But it will be dynamic because there will be continued innovation, and there will be also continued change in our environment, as you are all aware. As to the impact of consolidation, I think, you know, our current education customer base includes already quite some established large education companies.

Therefore, we don't think there will be too much impact, you know, in there. I can also further elaborate our thoughts around just, in general, competition with DIY or in-house solutions. First, I think, this question almost like applies to all PaaS or SaaS providers. They all might face a situation that their customers, when they grow bigger, trying to build something on their own.

For us, my view is that real-time engagement Platform as a Service is still a very young cloud service. It still has a long way to evolve. The quality of the experience will get better. Cost will get cheaper.

New features will be added every year. Even the form and format of the product is -- you know, still has many things to improve or to be defined in the next few years. So it will get harder and harder to build something just in-house with the same quality and cost and competitiveness of those offerings. No matter how big you are, if you can't build it better or cheaper, why would you still build it? And in the end, I think it's about the boundary of companies.

Each company should have a clear core competency. For example, education companies should focus on education, not hard-core technologies like real-time engagement will -- which will be used widely outside of education itself. As time goes on, you know, every company needs to stay focused to, you know, make their competition par in their own sector better. So I think it will be a natural outcome.

Jingbo Wang -- Chief Financial Officer

The second question on R&D. First of all, I would advise investors to really look at the non-GAAP R&D number because the GAAP number includes one-off expenses, such as acquisition-related expense. Significant portion of the acquisition consideration paid to the teams of Easemob and Netless was classified as R&D expense in the income statement. So in terms of the non-GAAP R&D expense, it was 43% of revenue in this quarter.

And we actually expect this to remain at around 40% level throughout the year as we continued to invest very heavily in R&D. So right now we have close to 1,000 employees. That's excluding Easemob, which has about 200. And out of that 1,200 total employee base, about two-thirds R&D employees, and they are working on a lot of things.

I can roughly divide these into three categories. The first one is quality improvements. On the front end or the SDK is the end-user software side, video-audio compression, how to minimize the video size while keeping high fidelity, how to lower CPU usage, how to reduce the size of the SDK, how to become more compatible with thousands of new devices coming out every year. So these are the things front-end team is working on.

And then the back-end team, they work on the global network routing algorithms, how to deal with [Inaudible]; how to deal with the failure of one server, one data center, one transmission line, or in one part of the whole network; how to scale up and down without affecting user experience; how to optimize cost structure, all these things. The second category would be new products, things like the flexible platform and content moderation for video. These are just two examples of the new products we released recently and also what Tony talked about in his opening remarks, all these new products. And the third category would be to support new use cases.

With the new use case, it often requires new features to be developed, new demos, new templates, and deep optimization of all the technical details with developers and customers. So that's the third direction. So all of these things, as you can see, they don't translate into revenue. Overall, they enhance our competitiveness and the overall breadth and depth of the platform.

So there will be a gradual revenue impact. And as we scale, as use case is proliferated, we do expect eventually R&D expense will come down as a percentage of revenue, but we do not expect that to change significantly during the course of this year, as we're still in the phase of investment.

Tony Zhao -- Founder, Chairman, and Chief Executive Officer

OK. I think there was a question around stickiness, right?

Jingbo Wang -- Chief Financial Officer


Tony Zhao -- Founder, Chairman, and Chief Executive Officer

I'll take that. So on how we increase the stickiness of customers, I think as you can see, we just keep rolling out new technology features with a bigger product portfolio and also more professional services as a result of keep focusing on creating value for developers. And in addition to that, there are also a few things we always try to do at Agora, you know, like, start the relationship early. Developers need our help the most when they are very small.

And this is why we had a large developer evangelists team in place and recently launched the start-up program. We offered technical support, industry best practice, new RTE use cases, free minutes, or even financial advisors. This kind of comprehensive engagement helps us build trust with our developers. And for larger customers, we offer work -- we often work closely with them to deeply integrate our software with their app to create best-in-class end-user experience.

We also co-explore or co-develop solutions for new use cases, such as the recent lecture hall use cases. When such effort is successful, it will both deepen our relationship and drive usage. And lastly, we also try to create value for all kinds of customers. Many customers don't see Agora as just a technology provider but a partner that can help make their business more successful.

Emerson Chan -- Bank of America Merrill Lynch -- Analyst

Thank you.


Our next question comes from the line of Vincent Yu from Needham and Company. Please ask your question.

Vincent Yu -- Needham & Company -- Analyst

Thank you. Thanks a lot, management, for taking my question, and congrats on the strong quarter. I have two questions. The first one is about the progress of incorporating Easemob services into our product offering.

How is the initial responses by customers? And should we still think about the annual run rate to be around $10 million? And the second question is about the new business expansions. Are we looking for a new acquisition target in 2021 or other business expansion areas? And if so, which are these areas to enhance our capabilities? Thank you.

Jingbo Wang -- Chief Financial Officer

Thank you. I'll take both questions. So the initial response from developers and customers on the Easemob acquisition has been very positive. We are now able to pitch new customers with the combined video, voice, and chat offering.

And we have also integrated Easemob chat, the chat API, you know, a flexible classroom and -- flexible classroom product, and several open-source projects such as Flat. As Tony mentioned in the opening remarks, while the integration in China market has been completed and we are working very hard with the Easemob team to make the chat product ready for the global market, we are working on things like English documentation, the API convention and also GDPR compliance. Currently, we plan to launch it globally as Agora Chat at the end of this year. And in terms of revenue run rate, yes, I think we can still use $10 million for now.

So in terms of new acquisitions, we are certainly looking at opportunities. Obviously, they may materialize or not in the end. It's highly uncertain. And to be more specific, I think we are looking for three things: one is technology.

We are looking for technology that can help make our product better. For example, video/audio codecs or video intelligence algorithms, and secondly, products that can complement our existing product portfolio. It can be either horizontal or vertical. And certainly, we are also interested in regional presence that's complementary to us.

Vincent Yu -- Needham & Company -- Analyst

Thank you. Thanks, management.


Our next question comes from the line of Akida Ayerkin from China Securities. Please ask your question.

Unknown speaker -- China Securities -- Analyst

Thank you for taking my question. I just have a question about the overseas business. So management just mentioned that the revenue contribution of overseas business is around 27% to 28%. Correct me if I'm wrong.

So I was wondering what is the revenue structure or contribution of different vertical sectors of non-China market, such as education and social entertainment, and so on? And also, I was wondering in the global market, what is the customer acquisition strategy? It would be helpful if you can share a bit more about the current pace of acquiring customers and if there is any change in terms of sales strategy in the global market. Thank you.

Jingbo Wang -- Chief Financial Officer

Sure. Yes, the number is correct. And in terms of the -- actually, we see ourselves as a global company. So it's really not overseas, it's -- we have three primary markets: the China market, the U.S.

market, and the, we call, rest of the world or the international markets. So for the U.S. and rest of the world markets, actually, we see a more diverse set of use cases. We have seen very strong growth in many use cases that don't have a strong presence or strong usage volume in China, things like virtual party.

We have a customer called [Inaudible]. We have a virtual event, which is very big outside of China. Customers like [Inaudible] is a customer and a partner. And we have virtual office use case.

We have several large customers in this space. All these use cases are very -- and of course, also the recent audio live cast use case. We have several large customers in that vertical already. So broadly speaking, it's still entertainment, social, education plus enterprise.

But the mix is actually a lot more diverse. So in terms of the go-to-market model, right, we pretty much -- OK. First of all, we have been in that market for a very long time. So it's not that we recently expanded there and hired a team.

The team has been there for a long time. Our go-to-market is really focused on both the grassroot developer community, developer-driven sales motion, and also the proactive outbound hunting motion. And we have a sales team of about 20 people, mostly focused on outbound, and we have a very strong developer-oriented sales and marketing team, developer evangelists, providing developer support, and we have a very easy-to-use self-serve portal. So this model is quite well balanced.

Unknown speaker -- China Securities -- Analyst

Thank you. 


Our next question comes from the line of Bing Duan from Nomura. Please ask your question.

Bing Duan -- Nomura Holdings -- Analyst

Hi. Thank you, management, for taking my questions. I have two questions. So first is a follow-up question about the development of our large customers.

Are we seeing, like, for example, our top five customers who -- which have already started or accelerated their in-house development of the real-time engagement solutions in, like, online education and social media sectors in the first quarter? And so what kind of solutions we have or value-added service we have to help retain and grow this kind of customers in the future? My second question is that -- could you elaborate more on the extended reality opportunities or use cases? Like, what kind of the technology barriers are in this kind of vertical? And are there any new or different solutions we need to provide? And how does management look at the future opportunities in this segment? Thank you.

Tony Zhao -- Founder, Chairman, and Chief Executive Officer

All right. I think for the first question on, further discuss with in-house development for large customers. From the beginning of Agora, we've been in constant battle with in-house solutions, things – you know, as you all know, you know, initially, there is no such concept of third-party professional providers. So almost all our businesses are winning from in-house solution or, you know, it's something our customers start to build on our platform.

You know, in the history of our business growth, we've been seeing customers who switch to in-house, as well as customers who, you know, again, switch back from in-house to us. In multiple cases, we saw customers who switch to in-house first and they had to switch back again to us. But overall, I would say, more and more customers start to realize the value of professional third-party providers. It's not just quality and cost but also the fact that they are safe.

We are, you know, saving them from all the troubles and focus -- so that they can focus on their core business. This has been reflected in our steady revenue growth despite certain customers switch in-house -- switching to in-house as to how to retain large customers. I think the answer is always to build the best solution or more professional solution for them, showing them how big a quality difference we can make and how professional a product and service offering we can deliver, you know, and, you know, how much of those differences leads to business success to them. In addition, we also offer work with our large customers to co-develop or co-explore solutions on new use cases, such as the recent lecture, you know, hall use case.

With such, you know, an effort to become successful, it will both deepen the relationship and drive usage and making the partnership, not just about technology service, rather innovation.

Jingbo Wang -- Chief Financial Officer

So in terms of the extended reality prospect, obviously, we feel very optimistic about the potential of these new developments in extended reality or virtual reality, augmented reality, all these new devices, new experiences. And our strategy is, we want to really help both the device manufacturers and also the software developers. As Tony mentioned in his opening remarks, right, we recently announced the partnership with HTC. And as part of that partnership, our SDK will be pre-installed in all the HTC VIVE devices.

So it will become a default choice for any software developer to use real-time engagement capability on the device. So that -- as we continue to build more and more partnerships like that, we want to really become a standard or the go-to solution for RTE technology on any VR or XR devices. And as to the use cases, right, we have -- as Tony mentioned, first of all, we can enable different device users to connect to video or voice. And additionally, and probably more importantly, we can allow them to live stream their experience, what they see in the virtual world to other people, whether it's other people sitting in front of the mobile phone or people in other metaverse.

You can stream this to another virtual work and become a connector between the two metaworks. We see a lot of potential in use cases like this. Obviously, this is all in still very early stage, and we believe the imagination of the developers far beyond ours.

Tony Zhao -- Founder, Chairman, and Chief Executive Officer

Yes. I want to add a little bit to that because I'm personally very excited about the potential of building such solutions or use cases. Although, as Jingbo pointed out, the overall growth is going to be long term, it's not going to be something just happened overnight, although we do see evidence that, you know, the growth or the improvements on those XR or VR experiences are accelerating in the past few quarters. The reason we are so much looking at this direction is because real-time engagement for any XR or VR experiences is, you know, super important to make sure the overall fluency or real-time needs of the experience.

And with that, I think, Agora is going to be critical for enabling or ensuring such experience to be immersive in any moment. So that's where you see the strategic value we can offer for such use cases. I think you can also see such a statement from the press release of our partnership with different partners.

Bing Duan -- Nomura Holdings -- Analyst

Thank you very much. 


Our next question comes from the line of John Wang from Macquarie. Please ask your question.

John Wang -- Macquarie Group -- Analyst

Thanks for taking my questions and congratulations on the impressive results. I've roughly three questions here. So firstly, can management share some colors on the user acquisition? Which verticals are we getting more new customers? And do we have more -- have proportionally more clients in the U.S. and rest of the world markets? And the second question is, in your prospectus, you mentioned that, you know, you powered more than 40 billion minutes of real-time engagement in last March.

Can management maybe update that number for us? And thirdly, you know, what can we expect for, you know, Easemob revenue contributions in the following quarters? Thanks.

Jingbo Wang -- Chief Financial Officer

Sure. So first of all, in terms of user acquisition, yes, as I mentioned in the opening remarks, right, we added about 11,000 apps -- new apps registered on platform per month in this quarter. And the majority came from the U.S. and rest of the world markets.

And in terms of verticals, we've got a lot of interest from the education sector, not just in China, actually, in the U.S. and rest of the world market as well, particularly on the new flexible classroom product. And we also got a lot of inquiries from several leading Internet companies on the audio live cast use case. The lecture hall use case, obviously, has huge revenue potential because it can transform the whole large class experience.

And in addition, obviously, we saw a lot of interest from next-generation use cases, like, AR/VR and also same like immersive gaming platforms that people say metaverse. Other interesting use cases or emerging use cases include virtual event, virtual office, virtual tours, virtual party, just to name some examples. So the second question on the minutes. We enabled more than 50 billion minutes of video and voice engagement per month on average in Q1 this year.

That compares to the 40-billion-minute number in March last year. Please note that, that 40-billion-minute number happened during the total lockdown in China. And that number was more than double the number of minutes in December 2019. So if we compare 50 billion in this quarter with December 2019, minutes almost tripled in the last 15 months.

What's the last question again? Can you repeat?

John Wang -- Macquarie Group -- Analyst

The revenue contribution -- potential revenue contribution from Easemob?

Jingbo Wang -- Chief Financial Officer

Oh, yes. Yes, we are still guiding a run rate of about $1 million per month. 

John Wang -- Macquarie Group -- Analyst



There is no more question at this time. I would now like to hand the conference back for today's presenter. Please continue.

Fionna Chen -- Head of Investor Relations

Thank you, operator. Thank you all for attending this call. If you have any further questions, please feel free to email us. We will also upload remarks of this call on our IR website after the call.

Thank you so much. Thank you.

Tony Zhao -- Founder, Chairman, and Chief Executive Officer

Thank you.

Jingbo Wang -- Chief Financial Officer

Thank you.


[Operator signoff]

Duration: 59 minutes

Call participants:

Fionna Chen -- Head of Investor Relations

Tony Zhao -- Founder, Chairman, and Chief Executive Officer

Jingbo Wang -- Chief Financial Officer

Yang Liu -- Morgan Stanley -- Analyst

Emerson Chan -- Bank of America Merrill Lynch -- Analyst

Vincent Yu -- Needham & Company -- Analyst

Unknown speaker -- China Securities -- Analyst

Bing Duan -- Nomura Holdings -- Analyst

John Wang -- Macquarie Group -- Analyst

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