Joseph Jacks
InvestorFounder and General Partner at OSS Capital · Board director at Liquid AI
United States
Writes $50K – $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.
Contact· self-published, not guessed
Invests in
AI & Machine LearningCloud ComputingData & InfrastructureDeveloper ToolsEnterprise SoftwareSaaS
Board director at Liquid AI
Intro paths
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In turn, Joseph can intro founders to Liquid AI's investors below.
Liquid AI's investors · 11
AMD VenturesSanta Clara · since 2025Bold Capital PartnersSanta Monica · since 2023Duke Capital PartnersDurham · since 2023Glasswing VenturesBoston · $100K – $5M checks · since 2023IsaiParis · $108K – $54M checks · since 2023ISAI Gestionsince 2023Link VenturesCambridge · $1M – $8M checks · since 2023OSS CapitalSan Francisco · $50K – $5M checks · since 2023Preston-Werner VenturesSan Francisco Bay Area · $500K – $3M checks · since 2023Samsung NextSan Jose · $100K – $5M checks · since 2023Untapped VenturesGlendale · $500K – $2M checks · since 2023
Co-founders at Liquid AI
DR
Daniela RusCo-founder
ML
Mathias LechnerCo-founder & CTO
RH
Ramin HasaniCo-founder & CEO
AA
Alexander AminiCo-founder & CSO
Experience
- Comp AIFounding Lead Seed Partnercurrent2025 — present
- PlaneFounding Lead Seed Partnercurrent2023 — present
- Liquid AIFounding Lead Seed Partnercurrent2023 — present
- W4 GamesFounding Lead Seed Partnercurrent2022 — present🍀
- Cal.com, Inc.Founding Lead Seed Partnercurrent2021 — present🗺
- OSS CapitalFounder and GPcurrent2018 — present
Skills & more
Languages Truth
From Joseph's professional profile.
Investments
Board seats
Per SEC Form D filings.
Colleagues at OSS Capital
Frequently asked questions
- Who is Joseph Jacks?
- 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.
- Where does Joseph Jacks work?
- Joseph Jacks is Founder and General Partner at OSS Capital and Board director at Liquid AI.
- What does Joseph Jacks invest in?
- Joseph Jacks invests in AI & Machine Learning, Cloud Computing, Data & Infrastructure, Developer Tools, Enterprise Software, SaaS.
- What check size does Joseph Jacks write?
- Joseph Jacks typically writes checks of $50K – $5M.
- What boards does Joseph Jacks sit on?
- Joseph Jacks holds tracked board seats at Liquid AI.
- Where did Joseph Jacks go to school?
- Joseph Jacks studied at Jacks Academy (Pre-school through High-school, General Studies).
Shared employers
Also worked at Comp AI1
Also worked at Liquid AI13
Andrew VazExecutive Venture Partner at Caduceus Capital PartnersRaymond LiaoManaging Director at Samsung NextAndy DuongInvestment Director at Samsung NextGeorge BandarianFounder, General Partner at Untapped VenturesDave BlundinManaging Partner at Link VenturesJohn WernerManaging Director and Partner at Link Ventures
+ 7 more
