Sam Zeloof (@szeloof) — Twitter Score 89 out of 1000

Sam Zeloof is a semiconductor engineer who co-founded Fab2, a company that designs semiconductor-manufacturing hardware and software and builds fabs, tools, and components. Sam Zeloof's Twitter Score is 89 out of 1000 (a Good rating) as of October 2026, ranking #8,589 (top 5%) among 493,668 tracked accounts.

Sam Zeloof co-founded Fab2, which operated under the name Atomic Semi before rebranding in 2026. The company's products include Studio, an in-browser collaborative EDA tool. Atomic Semi's seed round drew backing from OpenAI Startup Fund, Fred Ehrsam, Nat Friedman, and Naval Ravikant, among others. Ehrsam is also a co-founder of the crypto investment firm Paradigm. Prior to founding the company, Sam Zeloof documented his independent fabrication of homemade integrated circuits, including the Z1 amplifier and Z2 transistor array, on his personal technical site.

Sam Zeloof has remained publicly active, posting about Fab2's hiring and its new research-and-production headquarters. Sam Zeloof's account has published 2,164 posts and has been mentioned by 17 accounts a total of 25 times.

Who follows Sam Zeloof on X?

The accounts that follow Sam Zeloof include 336 founders, 105 angel investors, 56 influencers and 4 VCs, among them Marc Andreessen, Elon Musk, Toly, Erik Voorhees, Stani and Chris Burniske.