Startup · United States
Snorkel
HQ Redwood City, CaliforniaFounded 2019201-500 employeesUpdated
Snorkel AI builds specialized training data, benchmarks, and evaluation environments that help frontier models and agents perform in high-stakes domains.
Funding9 rounds · $585M
- Equity raised
- $585M
- Latest
- $350MSeries E+ · Sep 22, 2026
| Announced | Stage | Amount | Valuation | Lead investors | Other investors | Confidence |
|---|---|---|---|---|---|---|
| Sep 22, 2026 | Series E+ | $350M | — | Insight Partners, S32 | — | Reported |
| Aug 6, 2025 | Undisclosed | Undisclosed | — | — | — | Reported |
| May 29, 2025 | Series D | $100M | — | — | — | Speculative |
| Jan 23, 2024 | Undisclosed | Undisclosed | — | — | — | Reported |
| Aug 9, 2021 | Series C | $85.0M | — | Addition, BlackRock | — | Reported |
| Apr 7, 2021 | Series B | $35.0M | — | Lightspeed Venture Partners | — | Reported |
| Jul 14, 2020 | Seed | $3.3M | — | Greylock, GV | — | Reported |
| Jul 14, 2020 | Series A | $12.0M | — | Greylock | — | Reported |
| Jun 11, 2019 | Seed | Undisclosed | — | — | — | Reported |
- Series E+Led by Insight Partners, S32$350MSep 22, 2026
- UndisclosedUndisclosedAug 6, 2025
- Series DSpeculative$100MMay 29, 2025
- UndisclosedUndisclosedJan 23, 2024
- $85.0MAug 9, 2021
- Series BLed by Lightspeed Venture Partners$35.0MApr 7, 2021
- $3.3MJul 14, 2020
- Series ALed by Greylock$12.0MJul 14, 2020
- SeedUndisclosedJun 11, 2019
Raised counts equity rounds; debt, secondary sales and grants are totaled separately. Amounts in other currencies are converted at the announcement month's average rate. A ~ marks an estimated or converted amount.
People6
| Person | Role |
|---|---|
| Alexander Ratner | Co-Founder and CEO |
| Alex Ratner | co-founder and CEO |
| Braden Hancock | Co-Founder |
| Chris Re | Co-Founder |
| Henry Ehrenberg | Co-Founder |
| Paroma Varma | Co-Founder |
Sources5
Profile2
- 1
Sixth-Domain · Supports Organization · country, Organization · kind
“{"country": "USA", "hq_iso2": "US", "id": "0ab17323-61a3-484b-a0aa-91cb6d3b76dd"}”
- 2
Snorkel · Supports Organization · description, Organization · name, Organization · website
“Snorkel AI builds specialized training data, benchmarks, and evaluation environments that help frontier models and agents perform in high-stakes domains.”
Funding2
- 3
multiples.vc · Supports Funding round · amount, Organization · ownership
“Snorkel AI, a Redwood City-based provider of an AI Data Development Platform originating from the Stanford AI Lab, raised $100 million in its Series D funding round on May 29, 2025, at a $1.3 billion valuation.”
- 4DatabaseSnorkel AI company profile
Octen Business Search · Supports Funding round, Organization · employee range, Organization · founded year, Organization · hq city, Organization · hq region, Organization · linkedin url, Role
“funding round: Series A, 2020-07-14, USD 12,000,000, lead: Greylock”
People1
- 5CompanyAlex Ratner
Snorkel · Supports Role
“Alex Ratner is the co-founder and CEO at Snorkel AI, and an affiliate assistant professor of computer science at the University of Washington.”
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