Madrona
About Madrona
Madrona Venture Group was founded in 1995 in Seattle, Washington, by Tom Alberg, Paul Goodrich, Gerald Grinstein and William Ruckelshaus. At the end of 2020 the firm said it had raised more than $500 million in new capital, with over $345 million of that going to its eighth fund and $161 million to another vehicle. In September 2022 it raised $690 million, which it described as its largest fund to date. Partners who lead the AI work were not named in the public sources we reviewed.
Madrona's AI activity on the Lounge deals desk spans pre-seed to Series C rounds. The Polar, NewDays, SciFin, Golden Analytics, Thira and Ridge AI rounds are marked as led by the firm. Its larger recent AI rounds on the desk include Deepgram's Series C and Vinci's Series B. The firm's earlier investments in infrastructure software, such as Temporal in October 2020, show a long-running focus on company-building software rather than a single AI thesis.
Public descriptions say Madrona focuses on seed, startup, Series A and early-stage companies. The Lounge deals desk lists rounds from Pre-Seed through Series C+. Check sizes are not published in the sources we reviewed, so none are listed here.
- Deepgram: Series C, $130M (2026-01)
- Vinci: Series B, $250M (2026-10)
- SciFin: Seed, $44M (2026-09), led
- Entire: Seed, $60M (2026-07)
- Thira: Seed, $21M (2026-07), led
- Golden Analytics: Seed, $14M (2026-06); Seed, $7M (2026-04), led
- Polar: Seed, $5.7M (2026-07), led
- NewDays: Seed, $4.5M (2026-09), led
- Ridge AI: Pre-seed, $2.6M (2026-04), led
Investing activity
Madrona appears in 10 AI deals tracked by the AI Lounge deals desk, rounds totalling $519M, and led 6 of them. The rounds are mostly Seed, Series B and Pre-seed, with a median round size of $21M and the largest at $250M. The most recent are Vinci (Series B, $250M, Oct 2026), NewDays (Seed, $4.5M, Sep 2026) and SciFin (Seed, $44M, Sep 2026).
Madrona most often invests alongside NEA, Advent International, Xora Innovation and Temasek, and the companies it backs on AI Lounge are mostly in AI, AI for hardware engineering / EDA and Voice AI.
Deals
Frequently asked questions about Madrona
Does Madrona invest in AI startups?
Yes. Recent AI rounds on the Lounge deals desk include Deepgram's $130M Series C and Vinci's $250M Series B, along with several seed rounds the firm is marked as leading.
What stages does Madrona invest in?
Public descriptions say Madrona focuses on seed, startup, Series A and early-stage companies. Lounge also tracks its rounds from pre-seed through Series C+.
Where is Madrona based and when was it founded?
Madrona is based in Seattle, Washington, and was founded in 1995 by Tom Alberg, Paul Goodrich, Gerald Grinstein and William Ruckelshaus.
How large is Madrona's latest fund?
In September 2022 Madrona raised $690 million, which it described as its largest fund to date at the time. We did not find a more recent fund close in the sources reviewed.
What are Madrona's check sizes?
Madrona has not published its check sizes in the sources we reviewed. Founders should confirm typical round sizes directly with the firm.
What AI companies has Madrona invested in?
Madrona's AI investments include Vinci, NewDays, SciFin, Polar, Thira, Entire, Golden Analytics and Ridge AI. The 10 rounds on AI Lounge are listed on this page with amounts, dates and co-investors.
Where is Madrona based?
Madrona is based in Seattle, US.
What stage does Madrona invest at?
In the rounds tracked on AI Lounge, Madrona has invested at Seed, Series B, Pre-seed and Series C, with a median round of $21M. Madrona led 6 of those rounds.
Who does Madrona co-invest with?
Madrona's most frequent co-investors on AI Lounge are NEA (2 deals), Advent International (1 deal), Xora Innovation (1 deal), Temasek (1 deal) and Khosla Ventures (1 deal).
How can founders reach Madrona?
Founders on AI Lounge can see Madrona'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 Madrona to their Investor Pipeline to track the conversation.