2002 development incumbents ventures 
WSJ - The Accelerators
JULY 2, 2015
ED ZIMMERMAN : The funnel for venture funding isn’t cylindrical — it’s shape follows a more Darwinian conical path, as many seed stage companies march into the cone’s wide entrance and far fewer make it to the cone’s narrow end.
Tomasz Tunguz
APRIL 18, 2015
In the Innovator’s Dilemma for SaaS Startups , I outlined the path of many software companies, which disrupt incumbents by first serving the small-to-medium business and then move up-market by transitioning to serve larger enterprises with outbound sales teams. The pyramid above describes the Traditional Model.
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