Tammie (@tammiesiew) — Twitter Score 8 out of 1000

Tammie is a venture capitalist who serves as COO and General Partner at Pebblebed, an early-stage VC firm focused on AI, computing infrastructure, and deep technology. Tammie's Twitter Score is 8.2 out of 1000 as of October 2026, ranking #112,280 among 497,973 tracked accounts.

Tammie works at Pebblebed as COO and General Partner, joining the firm after it was launched by Pamela Vagata and Keith Adams. Per an SEC Form D filing for Pebblebed Fund II, LP, she is identified as an executive officer and Managing Member of the General Partner, reflecting her operational and investment leadership at the firm. Pebblebed backs technically rigorous companies across AI, computing infrastructure, and deep technology at the early stage.

Tammie co-founded Revery, a mobile app that applies cognitive behavioral therapy techniques to address insomnia through gamification. Revery raised a $2 million pre-seed investment. Previously, she worked at Sequoia Capital India and Southeast Asia as an investor, formerly at B Capital Group on the investment team via secondment, and earlier interned at GSR Ventures. Tammie's account has published 326 posts and has been mentioned by 3 accounts, with 4 total mentions.

Who follows Tammie on X?

The accounts that follow Tammie include 42 founders, 13 angel investors, 4 influencers and 2 VCs. Among her notable followers are Ryan Hoover, Robert Scoble, Cindy, Adam Draper, Matt Schlicht and Yohei.