Chalfen Ventures
Chalfen Ventures is a venture capital firm based in London, founded in 2018 by Mike Chalfen. The firm specializes in early-stage investments, focusing on Pre-seed, Seed, and Series A funding for B2B software and AI companies, particularly in Europe. With a fund size of $300 million, Chalfen Ventures emphasizes a collaborative approach, providing hands-on support to founders without the complexities of multi-partner funds. The firm invests across various sectors, including AI, PropTech, Data & Analytics, and Biotech. Chalfen Ventures maintains a portfolio of 21 companies and is known for leadi
Investing activity
Chalfen Ventures appears in 2 AI deals tracked by the AI Lounge deals desk, and led 1 of them. The rounds are mostly Seed, with a median round size of $9M. The most recent are Hestus (Seed, $7.4M, Oct 2026) and Iridius (Seed, $8.6M, Apr 2026).
Chalfen Ventures most often invests alongside Rock Yard Ventures, Insight Partners, Garage Capital and Osage Venture Partners, and the companies it backs on AI Lounge are mostly in AI.
Deals
Frequently asked questions about Chalfen Ventures
What AI companies has Chalfen Ventures invested in?
Chalfen Ventures's AI investments include Hestus and Iridius. The 2 rounds on AI Lounge are listed on this page with amounts, dates and co-investors.
Where is Chalfen Ventures based?
Chalfen Ventures is based in London, England, United Kingdom.
What stage does Chalfen Ventures invest at?
In the rounds tracked on AI Lounge, Chalfen Ventures has invested at Seed, with a median round of $9M. Chalfen Ventures led 1 of those rounds.
Who does Chalfen Ventures co-invest with?
Chalfen Ventures's most frequent co-investors on AI Lounge are Rock Yard Ventures (2 deals), Insight Partners (1 deal), Garage Capital (1 deal), Osage Venture Partners (1 deal) and Accenture (1 deal).
How can founders reach Chalfen Ventures?
Founders on AI Lounge can see Chalfen Ventures'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 Chalfen Ventures to their Investor Pipeline to track the conversation.