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SaaS Business Model: How It Works and Why It Is Here to Stay With more than 15,529 SaaS companies registered on Crunchbase and 12 times growth rate since 2010, it's okay to say that SaaS is a business model of the 21st century. As a SaaS design company, Eleken works with SaaS businesses every day. Over the past couple of years, we've seen an increasing number of entrepreneurs looking to adopt this business model. Why does everyone want to be a SaaS company?