Joe Sullivan
Joe Sullivan, CEO of Joe Sullivan Security LLC, Venture Partner at Costanoa Ventures, Board Director, Former Chief Security Officer (@ Cloudflare, Meta, Uber) & Former Federal Prosecutor at Costanoa Ventures, posted 15 times in the last 90 days, most often event announcements. That is about 1.2 posts a week; the most recent went up on Sep 28, 2026. The largest share was text-only posts (40%), with videos at 33% and images at 27%. By post type, event announcements lead at 45%, then industry thought leadership posts at 36% and personal highlights at 9%. Everything in that window was an original post, no reshares. In the benchmark Joe Sullivan ranks top quarter in Venture Capital. Costanoa Ventures has 11 other people in the benchmark, including Greg Sands, Jim Wilson and Mark Selcow.
What format they post
Also posting at Costanoa Ventures
- Greg SandsFounder & Managing Partner at Costanoa Ventures | Leading Seed & Series A15 posts
- Jim WilsonPartner at Costanoa Ventures | Board Member and Advisor | Founder Sales | Enterprise Sales | GTM Strategy | International Operations5 posts
- Mark SelcowGeneral Partner at Costanoa Ventures | Two-time Founder | Venture Investor | Enterprise Technology | Fintech | Vertical SaaS | Leadership | Operations5 posts
Post counts are the public LinkedIn posts Imagine AI collects for this person, taken over the 90 days to Sep 28, 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.
How to move up
- At Joe Sullivan's typical post, 2 more original posts a week, every week, would move Joe Sullivan from #460 to about #209.
- Posting every week at today's cadence alone would put Joe Sullivan at about #342.
- Video is Joe Sullivan's best format; text-only posts land below it.
