The software-as-a-service (SaaS) business model has become dominant over the past five years. It has made life easier for companies and employees, and produced enormous wealth for shareholders. Nowhere is that more obvious than in the results of (NYSE:BILL), which provides accounts payable and receivable tools that are crucial for small and medium-size businesses. The stock is up a remarkable 200% over the past year, and 750% since going public just two years ago.

In this Nov. 18 video from their YouTube channel, Motley Fool contributors Brian Stoffel and Brian Feroldi discuss a powerful force that shares in common with big winners like Shopify and Unity Software. They also discuss an underappreciated risk posed by one of the biggest players in the industry: Intuit

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