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
Cap table — not yet on record
Promptfoo's share-class structure hasn't surfaced in our sources yet. Cap tables are assembled from certificates of incorporation, round filings, and disclosures as they land.
Pro members can request priority coverage with a 48-hour turnaround.
Free account
More of Promptfoo with a free account
·Watch Promptfoo: the Monday email on marks, rounds and moves