JJ

Joseph Jacks

COSS startup founder and investor.

📍 United States🔄 Updated September 2026💼 25 investments📅 8 years investing🗓 Last invested Jul 2025
VC🌍 United States20+ investments
25
Total investments
15
Early stage
2
Mid stage
0
Late stage
8y
Years active

Portfolio

25 investments · sorted by recency
All investments
Early stage
Mid stage
Late stage
Lead Series A Board Member
Jul 2025
https://www.manifold.inc/
Founding Lead Pre-Seed Investor
Jan 2025
Comp AI gets companies compliant with SOC 2, ISO 27001, GDPR, HIPAA frameworks in hours. Trusted by teams like Dub, Scribe, and Repacket. We connects to your stack, automate evidence collection, track controls, manage vendors, and keep you compliant 24/7. We bundle the platform, support, and audit into one simple plan that helps teams move fast.
Founding Lead Seed Investor
Jan 2024
Nous Research is an AI research lab creating world-class open source AI. We are best known for Hermes Agent, our open-source AI agent harness, alongside the Hermes series of general-purpose, human-aligned models.
Lead Seed Investor
Jan 2024
Modern financial planning & wealth management. Maybe helps you figure out whats possible and how to get there.
Founding Lead Seed Investor
Sep 2023
At Tracel, we’re solving the challenge of AI model portability and efficiency across platforms, making deployment simpler and freeing teams from hardware constraints. We believe compute is central to AI’s evolution, powering smarter, more adaptable models. Through open-source tools, we’re building a foundation that drives AI innovation and scalability without the need for fragmented implementations.
Founding Lead Seed Investor
Aug 2023
Plane is a simple yet powerful, open source project planning tool. With its intuitive UI and powerful features, Plane makes it easy to plan and track projects, assign tasks to team members, and monitor progress. Host it on your own servers, and easily extend Plane with custom integrations. Choose from a rich set of developer APIs and never be limited by platform features.
Founding Lead Seed Investor
Jul 2023
Signing documents is a fundamental building block of private, economic, and government interactions. Access to easy and secure signing to participate in society should therefore be a fundamental right for everyone. The technology to enable this should be accessible and widespread. We know that open source is the key to solving this need once and for all to benefit all humankind. Using open source kickstarts innovation by putting the open sharing of ideas and solutions first. With Documenso, we will create an open and globally accessible signing platform to empower users, customers, and developers to fulfill their needs. Documenso is built by and for the global community, listening and implementing what is needed. Being transparent with the code and the processes that use it brings trust and security to the platform. We build Documenso for longevity and scale by embracing the capital efficiency and inclusiveness of the Commercial Open Source (COSS) movement. We are building a global commodity for the world.
Lead Seed Investor
May 2023
ResearchHub is on a mission to accelerate the pace of scientific research by creating incentives that encourage academics and citizen scientists to openly share knowledge https://discord.gg/researchhub
mid stageResearch
Founding Lead Seed Investor
May 2023
Formbricks is an open-source micro-survey solution. Segment your customer base granularly and ask at the perfect time in the customer journey. Privacy-first by design.
Founding Lead Seed Investor
Apr 2023
CrabNebula is a company built on the vision of enabling individuals, entrepreneurs and businesses to sustainably build, develop and distribute their multi-platform apps to mass audiences.
Founding Lead Seed Investor
Apr 2023
We build efficient general-purpose AI at every scale.
Founding Lead Seed Investor
Jan 2023
AppFlowy is a privacy-first, open source workspace for your notes, wikis, projects, and more. You are in charge of your data and customizations, with no vendor lock-in. Our mission is to enable everyone to achieve more with secure workplace tools. We aim to enable everyone to unleash their potential and achieve more with secure workplace tools by upholding these core values from the very beginning: - Data privacy first - Community-driven extensibility - Reliable and fast native app experience - Continuous, fast-paced innovation - Commitment to an open source philosophy Since its GitHub launch in November 2021, AppFlowy has accumulated more than 46,000 stars, 270+ contributors, and more than 5,000 community members. The application has been downloaded half a million times. AppFlowy was built with Rust from the very beginning. We saw Rust as a no-brainer option to create enterprise-grade productivity software because it is a high-integrity language that ensures stability, security, and performance. If you are a true believer in open source and passionate about using Rust to build world-class, open-source collaboration software together, we’d love to hear from you!
Pre-Seed Investor
Nov 2022
Stability AI sparked the Generative AI revolution with the release of Stable Diffusion in August 2022, marking our position as a global leader in the field. We develop cutting-edge open models in image, video, 3D, and audio, as well as professional applications designed for enterprise-grade visual media creation. Our models have garnered immense popularity among creators, developers and enterprises alike, with over 260 million downloads and counting. Stability AI has been recognized as one of Fortunes 50 AI Innovators and as one of Times Most Influential Companies. Additionally, Stable Audio was featured on TIMEs list of the Best Inventions of 2023. For press inquiries, please contact us at press@stability.ai. For customer support, reach out to support@stability.ai.
Founding Lead Seed Investor
Aug 2022
W4 Games is an Irish start-up which plans to revolutionize the online gaming market with a cloud platform based on open source technology, which will unlock and democratize the online multiplayer market for all independent developers.
early stageComputer Games
Founding Lead Seed Investor
Jun 2022
Combine your drives and clouds into one database that you can organize and explore from any device. Designed for creators, hoarders and the painfully disorganized.
Show all 25 investments ↓
Experience · 28 entries
All (28)
Investments (25)
Founder (3)
Board (1)
2025
Lead Series A Board Member
Jul 2025
https://www.manifold.inc/
Founding Lead Pre-Seed Investor
Jan 2025
Comp AI gets companies compliant with SOC 2, ISO 27001, GDPR, HIPAA frameworks in hours. Trusted by teams like Dub, Scribe, and Repacket. We connects to your stack, automate evidence collection, track controls, manage vendors, and keep you compliant 24/7. We bundle the platform, support, and audit into one simple plan that helps teams move fast.
2024
Founding Lead Seed Investor
Jan 2024
Nous Research is an AI research lab creating world-class open source AI. We are best known for Hermes Agent, our open-source AI agent harness, alongside the Hermes series of general-purpose, human-aligned models.
Lead Seed Investor
Jan 2024
Modern financial planning & wealth management. Maybe helps you figure out whats possible and how to get there.
Show all 28 entries ↓
Investment activity
2018–2025 · 25 investments
201822021720224202382024220252
Recent (last 2 years)Earlier