/Investor DB

Hartmann Capital — 2025 Investments

5 investments dated 2025 · listed companies and verified rows first · show all

Billybetsbillybets.aiinPre-Seed · Jul 2025 · $1M

Billy Bets builds AI-based market making technology for sports prediction markets.

AI & Machine LearningFintechSports Tech

Joseph O'Rourke(Founder)in

Co-investorsCoinbase Ventures

Mentramentra.glassin𝕏Seed · Jul 2025

Mentra builds smart glasses hardware, an open-source operating system (MentraOS), and developer tools for deploying applications on smart glasses.

AI & Machine LearningConsumerDeveloper ToolsEnterprise SoftwareHardwareSan Francisco, US

Cayden Pierce(CEO)inAlexander Israelov(Founder)inJhillika Kumar(Founder)

Co-investorsToyota VenturesAlumni VenturesOlive Tree CapitalPioneerTIRTA VenturesTranspose Platform Management+12 more

Mentramentra.comin𝕏Aug 2025

Mentra is a talent-matching platform that connects neurodivergent individuals with employers, aiming to match candidates to careers based on their skills, work ethic, personality, and workplace preferences.

EdTechFuture of WorkHR TechImpact & Social Good

Jhillika Kumar(Founder)in

Co-investorsCharlotte FundMPG FundShine CapitalVerissimo VenturesAlexa FundDAVID APPLE+5 more

PlaySafe IDplaysafeid.cominPre-Seed · May 2025 · $1M

PlaySafe ID provides gamers with an anonymised, verified identity that ties bans to the individual rather than a single game account, preventing caught cheaters from returning under new accounts.

CybersecurityGaming

Co-investorsEarly Game VenturesOverwolf

Other

Tracked investments with no reachable website or further public details — typically companies that wound down, renamed, or were absorbed.

Oriane

Rows marked “SEC filing” are inferred from directors named on the company's SEC Form D — public regulatory data, not a portfolio list published by the firm.