All companies should have a good sense of their GAAP revenue, but estimating for the future is always tricky. Subscriptions businesses are the lucky exception though, and can get an amazingly accurate estimate in seconds.
Many SaaS startups will eventually be acquired. Unfortunately, most of the acquiring companies don’t use SaaS metrics. As Matt Fates of Ascent Venture Partners explains, if potential acquirers don’t recognize the overall value of a SaaS company, negotiations will be hindered from the start.