Funding record · 2025 / 07
Promptfoo raises $18.4M Series A for AI security
Acquired by OpenAI
Announced 29 July 2025 · Recorded 8 September 2026 · Last verified 8 September 2026
Promptfoo, an AI security company based in San Francisco, United States, raised $18.4M in a Series A announced on 29 July 2025, led by Insight Partners and Andreessen Horowitz. Its disclosed equity funding is now $23.4M across 2 rounds.
- Amount
- $18.4M
- Round
- Series A
- Announced
- 29 July 2025
- Lead investors
- Insight Partners, Andreessen Horowitz
- Sources on record
- 1finance.yahoo.com
From the source
Promptfoo Raises $18.4 Million Series A to Build Definitive AI Security Stack
Promptfoo announced an $18.4 million Series A financing round led by Insight Partners with participation from existing investor Andreessen Horowitz. The funding will support the company's expansion into enterprise AI security, scaling its team and accelerating platform development to meet demand from Global 2000 companies.
finance.yahoo.com · 28 July 2025 ↗The Mandos read
What the record says about Promptfoo
- Momentum 51 / 100 · Steadylocked →
pillars in the platform
- 6 employeeslocked →
history and breakdowns in the platform
- Exit Readiness: Lowlocked →
Tested against 751 past exits in the Mandos record: 43% sat in Watch or Elevated 2 years before. Companies in Elevated exited at 3.1× the record's rate.
- Buyers most often compare Promptfoo with Realm Labs, Adversa AI and Ntur AI and 18 morelocked →
the full set in the platform
Funding history
Promptfoo funding on record
Promptfoo has raised $23.4M in priced equity. Its most recent round was a Series A in July 2025.
Latest round on record: Series A, Jul 2025.
Promptfoo funding on the profile →Related rounds
Other verified cybersecurity rounds
Also in Jul 2025
Most recent five, same month
In the platform
The round is the fact. The read is the product.
Every round, investor and correction for Promptfoo, the competitors buyers weigh it against, hiring by department, and an alert when the next thing happens.
The same record answers in Claude, ChatGPT and Cursor through the Mandos MCP server.
The Mandos Brief
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FAQ
Questions people ask
- How much did Promptfoo raise in its Series A?
- Promptfoo raised $18.4M in a Series A announced on 29 July 2025.
- Who invested in Promptfoo's Series A?
- The round was led by Insight Partners, Andreessen Horowitz.
- What does Promptfoo do?
- Promptfoo is a cybersecurity company specializing in AI Security, founded in 2024 and headquartered in San Francisco, United States.
