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
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.

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Frequently asked about Promptfoo

Where does Promptfoo's cap table come from?
Share classes are assembled from certificates of incorporation, priced-round filings, and disclosures across Promptfoo's 2 recorded funding rounds.
Promptfoo Cap Table & Share Classes | Premier Alternatives