How much should your SaaS startup spend on sales and marketing? I’ve written about using unit economics and lead funnel performance to answer this question. Emulating the patterns of successful SaaS companies is another technique. There are about 34 publicly traded SaaS companies that have published their revenue and sales & marketing expenses. Though their revenue growth rates are each unique, the sales and marketing spend patterns are quite similar. The revenue ramps of public SaaS companies follow the familiar exponential growth path.