Promptfoo

San Francisco, CA · Founded 2024 · Privately Held (backing)

Operator of an open-source large language model testing company intended to discover and eliminate major large language model risks. Promptfoo is based in San Francisco, CA and was founded in 2024. It was valued at $85.5 million at its early-stage round in Jul 2025, the last priced event on record. It has raised $22.7 million across 2 recorded rounds; the latest was a $17.5 million early-stage round in Jul 2025.

PMV mark · valuation
$85.5M
Oct 2026
Priced at
its early-stage round
Jul 2025
Total raised
$22.7M
Last round
Early Stage VC
Jul 2025

Who backs Promptfoo?

8 investors
InvestorType
Andreessen HorowitzVenture capital
Insight Partners (New York)PE / buyout
Uncorrelated VenturesVenture capital
515 Ventures—
Tobi Lütke—
Frederic Kerrest—
Skeptical Investments—
Stanislav Vishnevskiy—
The directory is free. Investor activity — the working column — is Pro.Unlock prospecting columns

Membership and data by Private Market View

Promptfoo investors

8 investors are on record for Promptfoo, including Andreessen Horowitz, Insight Partners (New York), Uncorrelated Ventures and 515 Ventures. The early-stage round in Jul 2025 drew 3 investors.

Free account
More of Promptfoo with a free account
  • ·Watch Promptfoo: the Monday email on marks, rounds and moves
Create free account
No card required

Membership and data by Private Market View

For fundraisers
Work this list, don’t just read it

These 8 firms already write checks for companies like Promptfoo. Build the wider list: every firm that has backed a company like this one, ranked by how often and how recently.

Find investors like these →

Membership and data by Private Market View