FJ Labs
FJ Labs is a stage-agnostic investment firm that focuses on marketplaces and consumer facing startups.
Investing activity
FJ Labs appears in 4 AI deals tracked by the AI Lounge deals desk, rounds totalling $30M. The rounds are mostly Seed and Series A, with a median round size of $10M and the largest at $20M. The most recent are Chariot Claims (Series A, $10M, Oct 2026), Causa Prima (Seed, $20M, Oct 2026) and Cata (Seed, $5.3M, Apr 2026).
FJ Labs most often invests alongside Silverton Partners, Neon Fund, Lightbank and ZVC, and the companies it backs on AI Lounge are mostly in AI and Legal AI, consumer claims.
Deals
Frequently asked questions about FJ Labs
What AI companies has FJ Labs invested in?
FJ Labs's AI investments include Chariot Claims, Causa Prima, Cata and Hamilton AI. The 4 rounds on AI Lounge are listed on this page with amounts, dates and co-investors.
Where is FJ Labs based?
FJ Labs is based in New York City, New York, United States.
What stage does FJ Labs invest at?
In the rounds tracked on AI Lounge, FJ Labs has invested at Seed and Series A, with a median round of $10M.
Who does FJ Labs co-invest with?
FJ Labs's most frequent co-investors on AI Lounge are Silverton Partners (1 deal), Neon Fund (1 deal), Lightbank (1 deal), ZVC (1 deal) and Graph Ventures (1 deal).
How can founders reach FJ Labs?
Founders on AI Lounge can see FJ Labs's contact details in AI Investor Contacts (paid plans), check for a warm introduction through members who worked with the firm under Warm Paths, and add FJ Labs to their Investor Pipeline to track the conversation.