Jack Groetzinger
Jack Groetzinger, Founder/CEO at SeatGeek at Founder Collective, posted 4 times in the last 90 days, most often industry thought leadership posts. That is about 0.3 posts a week; the most recent went up on Oct 15, 2026. Most of those were images (50%), with text-only posts at 25% and videos at 25%. Everything in that window was an original post, no reshares. Founder Collective has 10 other people in the benchmark, including Noah Glass, Micah Rosenbloom and Raj De Datta.
What format they post
Also posting at Founder Collective
Post counts are the public LinkedIn posts Imagine AI collects for this person, taken over the 90 days to Oct 15, 2026; reshares are left out of the post count and the format mix. Follower counts come from the last profile check. The band compares a typical post, the geometric mean of reactions on posts that have had two weeks to settle, with the Imagine AI research baseline of 20,000+ posts from B2B startups. How the benchmark is built.
