Jason Warner (@jasoncwarner) — Twitter Score 136 out of 1000

Jason Warner is an AI founder and angel investor who co-founded Poolside, an artificial intelligence company building foundation models for agentic software development. Jason Warner's Twitter Score is 136 out of 1000 (an Excellent rating) as of August 2026, ranking #4,428 (top 1%) among 483,652 tracked accounts.

Jason Warner co-founded Poolside and serves as its co-CEO, leading the company's work on AI models purpose-built for software engineering workflows. Poolside announced a $500 million fundraise in October 2024 to scale its training infrastructure to 10,000 GPUs. Beyond Poolside, Jason Warner serves as a Director at Atlassian and sits on the Operating Board of Directors at Bridgewater Associates.

Jason Warner previously served as Chief Technology Officer at GitHub, where he oversaw platform strategy and helped bring products including Actions, Packages, Advanced Security, Connect, and Codespaces to market. Before that, he was Vice President of Engineering at Heroku and formerly worked at Canonical. Between those engineering leadership roles and founding Poolside, Jason Warner was Managing Director at Redpoint Ventures from 2021 to 2023, where he invested across open-source technology, developer tools, infrastructure, fintech, and crypto, including co-authoring the firm's Series C announcement for Web3 infrastructure company Alchemy in October 2021.

As an angel investor, Jason Warner has backed Magic Labs, XMTP and Puma AI. Jason Warner's account has accumulated 39,388 followers as of August 2026 and 1,017 posts since joining in 2016. Jason Warner has been mentioned by 78 accounts a total of 156 times.

Who follows Jason Warner on X?

The accounts that follow Jason Warner include 641 founders, 206 angel investors, 69 influencers and 26 VCs. Among them are Marc Andreessen, Nikita Bier, jesse.base.eth, Laura Shin, Anthony Pompliano and Threadguy.