Steven Sinofsky (@stevesi) — Twitter Score 205 out of 1000

Steven Sinofsky is a technology investor and writer who serves as a board partner at Andreessen Horowitz, with affiliations extending to a16z crypto. Steven Sinofsky's Twitter Score is 199 out of 1000 (an Excellent rating) as of July 2026, ranking #2,545 (top 0.5%) among 531,432 tracked accounts.

Steven Sinofsky previously worked at Microsoft as president of the Windows Division, where he was responsible for engineering and marketing functions across Windows, Windows Live, and Internet Explorer. He joined Andreessen Horowitz as a board partner following his departure from Microsoft, representing the firm on portfolio-company boards rather than serving as a full-time partner.

Steven Sinofsky maintains an active writing practice through his Substack, Hardcore Software by Steven Sinofsky, where he has continued publishing into 2026. His seed investing activity and board partner role at Andreessen Horowitz give him indirect exposure to crypto and blockchain through the firm's affiliation with a16z crypto. Steven Sinofsky has accumulated 209,888 followers as of July 2026 and has published 1,222 posts on the platform. He has been mentioned by 432 accounts, with 1,327 total mentions.

Who follows Steven Sinofsky on X?

The accounts that follow Steven Sinofsky include 987 founders, 255 angel investors, 162 influencers and 40 VCs, among them Balaji, Brian Armstrong, Chris Dixon, Marc Andreessen, Sam Altman and 6529.