Joseph Jacks
InvestorFounder and General Partner at OSS Capital
United States
Writes $50K β $5M checks
About
Joseph Jacks, who coined the COSS category, focuses exclusively on startups with an essential open-source core and has LPs composed of founders from WordPress, Red Hat, MongoDB and GitHub.
Invests in
AI & Machine LearningCloud ComputingData & InfrastructureDeveloper ToolsEnterprise SoftwareSaaS
Experience
- Comp AIFounding Lead Seed Partnercurrent2025 β present
- PlaneFounding Lead Seed Partnercurrent2023 β present
- Liquid AIFounding Lead Seed Partnercurrent2023 β present
- W4 GamesFounding Lead Seed Partnercurrent2022 β presentπ
- Cal.com, Inc.Founding Lead Seed Partnercurrent2021 β presentπΊ
- OSS CapitalFounder and GPcurrent2018 β present
Education
- Jacks AcademyPre-school through High-school, General Studies1991 β 2006
Skills & more
Languages Truth
From Joseph's professional profile.
Shared employers
Also worked at Comp AI1
Also worked at Liquid AI8
Andrew VazExecutive Venture Partner at Caduceus Capital PartnersRaymond LiaoManaging Director at Samsung NextAndy DuongInvestment Director at Samsung NextGeorge BandarianFounder, General Partner at Untapped VenturesJohn WernerManaging Director and Partner at Link VenturesArnaud de ScorbiacPartner at Isai
+ 2 more
Investments
Board seats
Per SEC Form D filings.











