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Promptfoo

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Testing, evaluating, and securing AI applications and prompts through automated red-teaming and vulnerability scanning

San Francisco, United StatesFounded 2024Cybersecurity
Valuation $50–100M Last recorded · 2025
Headcount <100 Current team size
Total funding $10–50M Disclosed equity funding
Unlock exact values This page shows ranges. Dealroom has the exact numbers for Promptfoo and the history behind them.

About Promptfoo

Promptfoo is a pioneering cybersecurity company that leverages advanced language models to simulate attacks on applications, helping businesses identify and mitigate vulnerabilities. By employing adaptive red teaming techniques, Promptfoo creates customized attacks tailored to each client's specific risks and guardrails. This approach allows companies to proactively strengthen their defenses against potential threats, including direct and indirect prompt injections, jailbreaks, data leaks, and more. Promptfoo's solutions are particularly appealing to enterprises, as they have been battle-tested at scale and are trusted by numerous Fortune 500 companies. The company's tools are designed to be developer-friendly, offering a command-line interface and live reloads without requiring SDKs or cloud dependencies. This flexibility enables businesses to deploy Promptfoo's solutions quickly, whether through a managed cloud service or on-premises enterprise solutions. By focusing on security-first principles, Promptfoo empowers businesses to move swiftly while ensuring robust protection against evolving cyber threats. The company's commitment to innovation and customer needs has also garnered support from a large open-source developer community, further solidifying its position as a leader in AI-driven cybersecurity solutions.

Source: Dealroom company data

At a glance

Status
Acquired
Founded
2024
Headquarters
San Francisco, United States
Employees
5
Open positions
None listed
Dealroom signal
60.4/100
Industry
Security
Sub-industry
Data protection, Device security & Antivirus
Sector
Cloud Security, Security, Network Security, Developer Tools, Coding, Security Technology, Core AI, Cybersecurity
Technology
Artificial Intelligence
Business model
SaaS
Client focus
b2b

Funding history

3 recorded events

Company financing events and reported valuations.

Deal typeDateAmountValuationInvestorsSource
ACQUISITION✓Exit Mar 2026 $0 — OpenAI ↗
SERIES A✓Equity / VC Jul 2025 $18M $74M Andreessen Horowitz · Insight Partners ↗
Showing the latest 2 of 3 recorded eventsBook a demo for the full funding history →

Growth signals

Promptfoo website traffic

Latest recorded traffic for Promptfoo is 180K monthly website visits, down 5.3% over the last three months. Promptfoo's team declined 77.3% over the past year.

Latest monthly visits180K 3-month web change-5.3% 1-year team growth-77.3%
Summary metrics are public; monthly history is available with a demoCompare with peers →

Similar companies

Closest operating peers by Dealroom taxonomy

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Showing 8 of the closest matchesCompare every metric →

Investments and acquisitions

Capital deployed

Recent portfolio relationships for companies that also act as investors or acquirers.

Investors

7 investors on the cap table

From Dealroom's funding and investor records, grouped by the round each investor first entered.

Seed4 investors entered at this stage

Series A1 investor entered at this stage

Other known investors2 additional known investors

  • OpenAI
  • 515 Ventures
Team profiled 5 named & role-tagged
Founders Hidden — book a demo/100 quality score
Key operators 2 quality Hidden — book a demo/100
Potential founders Hidden — book a demo likely future founders
Startup mafia Hidden — book a demo alumni-founded startups
Talent movements Hidden — book a demo in · Hidden — book a demo out past 12 months

Source: Dealroom Talent Intelligence.

Global footprint

Workforce and web traffic by country
Workforce by country
1 countries with
team presence
🇺🇸 United States100%
1 country shown

Market sentiment

Posts on X, past 7 days

An AI-synthesised read of the highest-engagement posts about Promptfoo on X, ranked by likes and reposts, corporate channels excluded.

Reading the room on X — pulling top posts and synthesizing themes…

Source: X recent search ranked by engagement (likes + retweets) · Synthesis by Claude · Cached for 1 hour

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