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acquisitionAnnounced · Mar 10, 2026AI securitySource · Unverified ReportsArticle · Factual
OpenAI acquires Promptfoo
David Najork · Founding Software Engineer
Published · Updated · 1 min read
Deal value
—
Target
Promptfoo
Acquirer
OpenAI
Full Acquisition
Status
Announced
OpenAI agreed to acquire Promptfoo. Reported deal value: Undisclosed. Status: Announced. Sector: AI security. Target headquarters context: Location not specified.
This page summarizes publicly available information about the transaction as of 2026-03-10. Figures and status may change as filings and press coverage update.
March 10, 2026 OpenAI has announced the acquisition of Promptfoo , an AI security startup founded in 2024 by Ian Webster and Michael D’Angelo, in a move aimed at strengthening the safety and reliability of AI agents used in enterprise environments
Deal timeline
Announced
Mar 10, 2026 · theaiinsider.tech
Additional milestones (proxy, vote, close) appear as filings and press updates are indexed.
Sector context
This transaction is classified in AI security. Figures and status may change as sources update.
Sources: theaiinsider.tech · Primary article · FireStrike proprietary index