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    3. Promptfoo, Inc.

    Promptfoo, Inc.

    Promptfoo helps developers and enterprises build secure, reliable AI applications by providing automated red-teaming, evaluation, and security testing tools.

    Visit Website

    At a Glance

    1Tool Listed
    3Products
    15Tool Views
    8Capabilities
    Discussions
    San Francisco, CaliforniaHeadquarters
    2024Est.
    24Employees
    $23.6MRaised
    Focus Areas
    Application Security
    LLM Evaluations
    Security Testing
    Connect
    Latest News
    OpenAI acquires Promptfoo to secure its AI agentsMar 9, 2026
    Promptfoo research reveals DeepSeek AI censorship patternsJan 1, 2025
    Markets
    • Fortune 500 enterprises
    • AI model laboratories
    • SaaS and AI application developers

    AI Tools by Promptfoo, Inc.

    (1)
    View promptfoo
    promptfoo tool icon

    promptfoo

    LLM Security Testing Platform

    App SecurityLLM EvaluationsSecurity Testing

    Discussions

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    Latest News

    03/09/2026

    OpenAI acquires Promptfoo to secure its AI agents

    techcrunch.com
    01/01/2025

    Promptfoo research reveals DeepSeek AI censorship patterns

    promptfoo.dev
    07/28/2024

    Promptfoo Raises $18.4M Series A to Build the Definitive AI Security Stack

    promptfoo.dev
    08/02/2024

    Podcast: Securing AI by Democratizing Red Teams with a16z

    promptfoo.dev

    Products & Services

    3
    Promptfoo CLI / Open Source Framework
    2024

    A command-line tool and library for evaluating LLM prompts, models, and RAGs. Includes automated red-teaming and vulnerability scanning.

    Promptfoo Enterprise
    2024

    A collaborative platform for teams that adds centralized security monitoring, compliance reporting, SSO, and CI/CD integration.

    On-Premise Deployment
    2024

    Full-control deployment on customer infrastructure for complete data isolation and security.

    Market Position

    Leading open-source-first framework for AI red-teaming and evaluation, favored for local execution and developer-centric workflow.

    Leadership

    Founders

    IW

    Ian Webster

    CEO & Co-founder. Previously Senior Staff Software Engineer at Discord, where he launched and scaled AI products including Clyde AI to over 200 million users.

    MD

    Michael D'Angelo

    CTO & Co-founder. Previously VP of Engineering at Discord, with extensive experience in scaling massive consumer AI products and engineering teams.

    Executive Team

    IW

    Ian Webster

    CEO & Co-founder

    Former Senior Staff SWE at Discord; background in scaling AI at massive scale.

    MD

    Michael D'Angelo

    CTO & Co-founder

    Former VP of Engineering at Discord; expert in engineering management and AI systems.

    Board of Directors

    GB
    Ganesh Bell
    Managing Director at Insight Partners; Board Member
    ZL
    Zane Lackey
    General Partner at Andreessen Horowitz; Board Member/Advisor
    JD
    Joel de la Garza
    Investment Partner at Andreessen Horowitz; Advisor

    Founding Story

    Founded by former Discord leaders who saw a gap in security tooling as AI systems grew more complex. They aimed to make AI security testing as automated and standard as unit testing.

    Business Model

    Revenue
    Not publicly reported; estimated to be in early-stage growth given Series A status (July 2024).

    Revenue Model

    Open-core model: free open-source tool with paid enterprise and on-premise subscriptions for collaboration, compliance, and monitoring features.

    Pricing Tiers

    Community
    Free Forever

    Open-source LLM evaluation, red-teaming (10k probes/mo), run locally/self-host.

    Enterprise
    Custom

    Team sharing, centralized security dashboard, custom red-team limits, SSO, managed cloud.

    On-Premise
    Custom

    Full enterprise features deployed on user infrastructure with complete data isolation.

    Acquired by OpenAI (announced March 2026)

    Target Markets

    Industries & Segments
    • Fortune 500 enterprises
    • AI model laboratories
    • SaaS and AI application developers
    Use Cases
    • Security red-teaming for enterprise compliance
    • RAG performance and accuracy testing
    • Autonomous agent security assessments
    • Model selection and benchmarking
    • Continuous monitoring of AI applications in production
    Notable Customers
    • Semgrep
    • Discord
    • 30+ Fortune 500 companies

    Quick Facts

    Headquarters
    San Francisco, California
    Founded
    2024
    Entity Type
    Inc.
    Employees
    24
    Total Funding
    $23.6 million
    Investors
    Insight Partners, Andreessen Horowitz
    Office Locations
    San Francisco

    Funding History

    Series A$18,400,000
    July 2024
    Not disclosed valuation
    Insight Partners
    Seed$5,200,000
    June 2024
    Not disclosed valuation
    Andreessen Horowitz

    History & Milestones

    March 9, 2026

    Announced acquisition by OpenAI to strengthen AI agent security and safety.

    January 2025

    Conducted and published high-profile research on DeepSeek AI censorship, gaining international media coverage.

    2024

    Company founded in San Francisco.

    June 2024

    Raised $5.2 million in Seed funding.

    July 2024

    Raised $18.4 million in Series A funding led by Insight Partners.

    Key Capabilities

    8
    Automated red-teaming and adversarial testing
    Vulnerability scanning for LLMs, RAGs, and agents
    Test-driven development (TDD) for AI prompts
    CI/CD integration for automated security checks
    Support for Multi-provider LLMs (OpenAI, Anthropic, etc.)
    Compliance reporting (EU AI Act, OWASP, NIST)

    Integrations & Partnerships

    Platform Integrations

    • GitHub Actions
    • GitLab CI
    • CircleCI
    • Node.js
    • Python
    • MCP Servers

    Key Partnerships

    OpenAI (Acquirer)
    Insight Partners
    Andreessen Horowitz

    Connect

    Website
    promptfoo.dev
    GitHub
    promptfoo
    LinkedIn
    promptfoo
    Discord
    promptfoo

    AI Topics

    3

    Promptfoo, Inc. focuses on these topics:

    Application Security(1)
    LLM Evaluations(1)
    Security Testing(1)
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