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Promptfoo
Open-source LLM testing, evals, and red teaming
Promptfoo is an open-source framework that runs automated red teaming, prompt evals, and vulnerability scanning on LLM applications. For AI engineers and security teams building agents, RAG pipelines, or any LLM-powered product.
One of the best open-source AI testing frameworks just got acquired by OpenAI, and it's still fully open source.
Promptfoo tests, evaluates, and red teams LLM applications from inside your development workflow.
The gap it fills: most teams ship AI features without ever systematically attacking their own prompts.
Promptfoo automates that.
It generates adversarial inputs tailored to your app, catches injections, jailbreaks, PII leaks, and agent misuse before a user does.
Key things it does:
Automated red teaming with 50+ vulnerability types
Prompt evals for regression testing across model versions
CI/CD integration for GitHub, GitLab, Jenkins
Real-time guardrails for production inputs
MCP proxy for securing Model Context Protocol communications
Built for AI engineers, security teams, and anyone running agents or RAG pipelines in production.
20k GitHub stars and used at more than 25% of Fortune 500 companies.
That adoption is the clearest signal of the gap it fills.
The OpenAI acquisition is worth watching, but the open-source commitment is explicit.
Model-agnostic testing stays intact.
About Promptfoo on Product Hunt
“Open-source LLM testing, evals, and red teaming”
Promptfoo was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #47 on the daily leaderboard. Promptfoo is an open-source framework that runs automated red teaming, prompt evals, and vulnerability scanning on LLM applications. For AI engineers and security teams building agents, RAG pipelines, or any LLM-powered product.
On the analytics side, Promptfoo competes within Artificial Intelligence — topics that collectively have 466.2k followers on Product Hunt. The dashboard above tracks how Promptfoo performed against the three products that launched closest to it on the same day.
One of the best open-source AI testing frameworks just got acquired by OpenAI, and it's still fully open source.
Promptfoo tests, evaluates, and red teams LLM applications from inside your development workflow.
The gap it fills: most teams ship AI features without ever systematically attacking their own prompts.
Promptfoo automates that.
It generates adversarial inputs tailored to your app, catches injections, jailbreaks, PII leaks, and agent misuse before a user does.
Key things it does:
Automated red teaming with 50+ vulnerability types
Prompt evals for regression testing across model versions
CI/CD integration for GitHub, GitLab, Jenkins
Real-time guardrails for production inputs
MCP proxy for securing Model Context Protocol communications
Built for AI engineers, security teams, and anyone running agents or RAG pipelines in production.
20k GitHub stars and used at more than 25% of Fortune 500 companies.
That adoption is the clearest signal of the gap it fills.
The OpenAI acquisition is worth watching, but the open-source commitment is explicit.
Model-agnostic testing stays intact.