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devtools

Test AI with promptfoo

Founders get AI vulnerability scanning with promptfoo, used by OpenAI and Anthropic, with 22k+ GitHub stars
intermediateโฑ 30 minutes๐Ÿ’ต Free (self-hosted)
23,400 stars2,092 forksTypeScriptQuality 9/10Updated 7/19/2026100% free ยท open source
What it is

Scan AI systems for security vulnerabilities

What you can make with it

Red teaming scripts to test AI models like GPT and Claude for weaknesses

How it helps

It helps founders and developers detect potential security holes in their AI systems, preventing data breaches and other security incidents

Real use case example

"A founder, Alex, wants to validate the security of their AI-powered customer service chatbot. Alex imports their chatbot model into promptfoo, creates a simple configuration, and runs a vulnerability scan. The result is a detailed report highlighting potential security issues for Alex to address."

If you're new

Pick this up when you're new to AI development and want to learn how to secure your models

If you're senior

Senior engineers and professionals will reach for this when they need to perform a thorough security audit on their AI systems

Common confusion cleared up

promptfoo is not just for testing AI models, it's also used for comparing the performance of different LLMs and evaluating their strengths and weaknesses

Pairs with
OpenAI LLMAnthropic Claude
Why we list it on WorkflowStacks: This skill is included because it's a best-in-class open-source solution
What it does

Helps developers systematically test and compare AI prompts, models, and AI systems before putting them into production

When to use it
  • โ€ขWhen building an AI product and want to validate prompt reliability
  • โ€ขBefore deploying a RAG (retrieval-augmented generation) system to ensure quality
  • โ€ขWhen comparing performance across different AI models and configurations
Quick start
  1. 1Install via npm: npm install -g promptfoo
  2. 2Create a config file defining test cases and models
  3. 3Run tests with: promptfoo eval
  4. 4Review performance metrics and comparison report
Ready-to-paste prompt
promptfoo eval -c config.yaml
Saves to your device

Topics

ci
ci-cd
cicd
evaluation
evaluation-framework
llm
llm-eval
llm-evaluation
llm-evaluation-framework
llmops
pentesting
prompt-engineering
prompt-testing
prompts
rag
red-teaming
testing
vulnerability-scanners
What's inside โ€” free to inspect
No purchase needed

Read the entire source before you build โ€” unlike paid marketplaces that hide it behind a buy button.

38
top-level files
20
folders
666.9M
repo size
MIT
license
Key files
AGENTS.md
drizzle.config.ts
package.json
README.md
release-please-config.json
tsconfig.json
File tree
.agents/
.claude/
.claude-plugin/
.cursor/
.devcontainer/
.github/
.husky/
.vscode/
architecture/
code-scan-action/
docs/
drizzle/
examples/
helm/
plugins/
scripts/
site/
src/
test/
tools/
.biomeignore
.dockerignore
.git-blame-ignore-revs
.gitignore
Quick Actions
Details
Creator
promptfoo
Language
TypeScript
Category
devtools
Published
4/28/2023

Are you the creator of this tool? Claim your listing โ†’ and earn 85% of every sale.

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