Matrix Partners
Matrix is an early-stage venture capital firm, investing from idea through Series A. As a close-knit team of former founders and company builders, Matrix has partnered with companies from Apple and FedEx to Oculus and Canva. Other Matrix investments include Fivetran, Suno, Side, Afterpay, CTRL-Labs, Oculus, Zendesk, Hubspot, Apollo GraphQL, Flock Safety, GOAT, Postmates, Acacia Communications, and Sila. Per Crunchbase, Matrix has made 592 investments, 193 as lead investor across 302 portfolio companies, with 151 exits including 24 IPOs.
Investing activity
Matrix Partners appears in 4 AI deals tracked by the AI Lounge deals desk, and led 3 of them. The rounds are mostly Seed and Pre-seed, with a median round size of $5M and the largest at $5M. The most recent are Lemma (Pre-seed, $2.3M, Aug 2026), Deeptrace (Seed, $5M, Mar 2026) and Thunder Compute (Seed, $4.5M, Jan 2026).
Matrix Partners most often invests alongside Y Combinator, Transpose Platform Management, Comma Capital and Position Ventures, and the companies it backs on AI Lounge are mostly in AI.
Deals
Frequently asked questions about Matrix Partners
What AI companies has Matrix Partners invested in?
Matrix Partners's AI investments include Lemma, Deeptrace, Thunder Compute and Fini AI. The 4 rounds on AI Lounge are listed on this page with amounts, dates and co-investors.
Where is Matrix Partners based?
Matrix Partners is based in Cambridge, Massachusetts, United States.
What stage does Matrix Partners invest at?
In the rounds tracked on AI Lounge, Matrix Partners has invested at Seed and Pre-seed, with a median round of $5M. Matrix Partners led 3 of those rounds.
Who does Matrix Partners co-invest with?
Matrix Partners's most frequent co-investors on AI Lounge are Y Combinator (4 deals), Transpose Platform Management (2 deals), Comma Capital (1 deal), Position Ventures (1 deal) and Cervin Ventures (1 deal).
How can founders reach Matrix Partners?
Founders on AI Lounge can see Matrix Partners'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 Matrix Partners to their Investor Pipeline to track the conversation.