Despite initially unveiling HomeKit way back in 2014, Apple (AAPL -0.82%) is still meaningfully behind in the smart-home arena, and rivals (AMZN -0.09%) and Alphabet (GOOG 0.92%) (GOOGL 0.93%) subsidiary Google are taking full advantage of that opening. Amazon established an early lead with its original Echo speaker, and Google followed suit with its Google Home device last year.

Over the past couple of weeks, Amazon and Google have both expanded their smart-home product portfolios. Amazon has been on a tear this year, announcing Echo device after Echo device, and Google's unveilings this week similarly added new products to its mix that address both higher and lower price points. Apple announced its HomePod at WWDC in June, and is set to launch it in December. But it won't be enough.

Top of HomePod with Siri

Image source: Apple.

Too much, too slow

Before factoring in competitive differences with each companies' respective virtual assistants -- Alexa, Siri, and Google Assistant -- or support for different smart-home protocols, it all starts with the hardware. Echo and Google Home are becoming product families, compared to Apple's singular device that is currently positioned more as a high-fidelity audio offering as opposed to focusing on smart-home technology.

Consider the smart-home product portfolios of each company, including how they span the pricing spectrum.

Chart comparing different smart-home products and price points for Amazon, Google, and Apple

Data sources: Amazon, Google, and Apple. Chart by author.

Remember when CEO Tim Cook used to talk about price umbrellas? Well, at $350, the HomePod is leaving plenty of room for rivals to offer lower-cost products.

If Apple really wants to take smart-home technology seriously (which is debatable), then it's pretty clear that the HomePod will not be enough. Consumers are going to want to buy numerous affordable devices in order to make virtual assistants omnipresent throughout the home. What they won't want to do is buy multiple $350 audiophile-quality speakers just to add Siri to the bathroom.

Google's new Home Mini is explicit acknowledgement and validation of this fact, piggybacking on Amazon's strategy. Home Max may appear to be a response to HomePod, but it takes more than a few months to develop a product like this, so it's pretty clear Google has been planning Home Max for quite some time. Apple just happened to unveil HomePod first. By introducing smart-home products at both higher and lower price points, Google is turning up the pressure on Apple to eventually release a lower-cost device sans high-fidelity audio so that consumers can buy a lot of them without breaking the bank.

Platform disadvantages are hard to overcome

Apple never tries to be the first to market provided it can be the best once it gets there. The Mac maker has successfully implemented this strategy throughout its history, but this is a platform play. Alexa is so powerful because Amazon has created a vibrant platform for smart-home product manufacturers. This is another area where HomeKit is behind, in part because of Apple's onerous requirements for products to become officially HomeKit certified.

If you've ever wondered why Apple's selection of HomeKit-certified accessories is still relatively limited, this is probably why. Product makers are required to include very specific networking and security chips that are more expensive, according to a Reuters report from earlier this year. The products even have to be made in specific factories that Apple has certified, many of which don't specialize in smart-home products and/or charge higher prices for contract manufacturing services. Amazon's Alexa platform has no such hardware requirements, and focuses on software compatibility.

Apple has apparently realized the error of its ways, and announced several important changes to HomeKit in June. Apple opened up HomeKit to all developers so that anyone with an Apple developer account can create a HomeKit device. However, products that are intended for commercial sale still must sign up for Apple's MFi licensing program. Perhaps more importantly, HomeKit devices no longer need special chips for hardware authentication, and Apple is shifting to software authentication for security. These changes will help the HomeKit platform by making it more flexible, but the company is still facing an uphill battle.

For a company that should be intimately aware of how hard it is to overcome platform leads (like when Windows won the PC), Apple should realize that it can't wait too long.