HF0
HF0 runs a 12-week live-in residency in San Francisco for repeat and technical founders, most of them building AI companies, and invests in each company.
Investing activity
HF0 appears in 3 AI deals tracked by the AI Lounge deals desk, rounds totalling $52M. The rounds are mostly Seed and Pre-seed, with a median round size of $8M and the largest at $52M. The most recent are Fish Audio (Seed, $52M, Jul 2026), Cast Insights (Pre-seed, $4.5M, Jul 2026) and Hamilton AI (Seed, $7.5M, Mar 2026).
HF0 most often invests alongside Coreline Ventures, Capital Today, 359 Capital and Carya Venture Partners, and the companies it backs on AI Lounge are mostly in AI.
Deals
Frequently asked questions about HF0
What AI companies has HF0 invested in?
HF0's AI investments include Fish Audio, Cast Insights and Hamilton AI. The 3 rounds on AI Lounge are listed on this page with amounts, dates and co-investors.
Where is HF0 based?
HF0 is based in San Francisco, California, United States.
What stage does HF0 invest at?
In the rounds tracked on AI Lounge, HF0 has invested at Seed and Pre-seed, with a median round of $8M.
Who does HF0 co-invest with?
HF0's most frequent co-investors on AI Lounge are Coreline Ventures (1 deal), Capital Today (1 deal), 359 Capital (1 deal), Carya Venture Partners (1 deal) and Hyphen Capital (1 deal).
How can founders reach HF0?
Founders on AI Lounge can see HF0'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 HF0 to their Investor Pipeline to track the conversation.