The Gem Mafia
7 people came through Gem and went on to found or lead other companies.
Daniel LevineBoard MemberFounded ChartioDavid WadhwaniListed as an 'Investor' representative on Gem's Greylock portfolio page; no longer appears on Greylock's current public team roster as of Aug 2026, so his present affiliation/board status is unconfirmed.Founded AppdynamicsMaggie ZhangSoftware Engineer InternFounded Read BeanUlysse CarionSoftware EngineerFounded TesseralJosh ValdezSenior Software EngineerFounded EnginesJet ZhouFounding EngineerFounded EnginesPhilena LiuSoftware Engineer InternFounded Lumona
Frequently asked questions
- What is the Gem mafia?
- The Gem mafia is the network of 7 people who came through Gem and went on to found or lead other companies, including Chartio, Appdynamics, Read Bean, Tesseral, Engines.
- Who is in the Gem mafia?
- Notable members include Daniel Levine (Chartio), David Wadhwani (Appdynamics), Maggie Zhang (Read Bean), Ulysse Carion (Tesseral), Josh Valdez (Engines), Jet Zhou (Engines), Philena Liu (Lumona).
- What companies did Gem alumni found?
- Companies founded by Gem alumni include Chartio, Appdynamics, Read Bean, Tesseral, Engines, Lumona.







