Flex Capital
Flex Capital is a venture capital firm based in San Francisco, California, founded in 2017 by a team of experienced CEOs who are also active investors. The firm focuses on early-stage B2B SaaS companies, providing not only funding but also strategic support to founders. Flex Capital operates under the philosophy of "Founders backing founders," emphasizing a partnership approach that prioritizes trust and growth. The firm invests in companies at various stages, from Seed to Series B, and occasionally Series C. With a portfolio that includes notable names like Chime, Coinbase, and Niantic, Flex
Investing activity
Flex Capital appears in 2 AI deals tracked by the AI Lounge deals desk, rounds totalling $15M. The rounds are mostly Seed, with a median round size of $15M. The most recent are Multifactor (Seed, $15M, Jul 2026) and Kin Health (Seed, $9M, Jun 2026).
Flex Capital most often invests alongside Nexus Venture Partners, Padma Warrior, Gokul Rajaram and Liquid 2 Ventures, and the companies it backs on AI Lounge are mostly in AI.
Deals
Frequently asked questions about Flex Capital
What AI companies has Flex Capital invested in?
Flex Capital's AI investments include Multifactor and Kin Health. The 2 rounds on AI Lounge are listed on this page with amounts, dates and co-investors.
Where is Flex Capital based?
Flex Capital is based in San Francisco, California, United States.
What stage does Flex Capital invest at?
In the rounds tracked on AI Lounge, Flex Capital has invested at Seed, with a median round of $15M.
Who does Flex Capital co-invest with?
Flex Capital's most frequent co-investors on AI Lounge are Nexus Venture Partners (1 deal), Padma Warrior (1 deal), Gokul Rajaram (1 deal), Liquid 2 Ventures (1 deal) and Mathilde Collin (1 deal).
How can founders reach Flex Capital?
Founders on AI Lounge can see Flex Capital'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 Flex Capital to their Investor Pipeline to track the conversation.