head to head · open source
promptfoo vs REA-Prompts
promptfoo has 26,429 GitHub stars, 2,580 forks, 651 open issues and last shipped yesterday. REA-Prompts has 2,507 stars, 453 forks, 0 open issues and last shipped yesterday. promptfoo leads on adoption by 954% (26,429 vs 2,507 stars). promptfoo is written in TypeScript under MIT; REA-Prompts is written in Batchfile under MIT. promptfoo has attracted 10% as many forks as stars, REA-Prompts 18%. promptfoo was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (prompt-engineering), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
← all 20902 open source comparisons
Side by side
| promptfoo | REA-Prompts | |
|---|---|---|
| GitHub stars | ★ 26K | ★ 2.5K |
| License | MIT | MIT |
| Written in | TypeScript | Batchfile |
| Last push | 2026-10-26 | 2026-10-26 |
| Forks | ⑂ 2.6K | ⑂ 453 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick promptfoo if
- You weight community size — 26K stars and counting
- You want the MIT license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick REA-Prompts if
- You want the REA-Prompts feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Batchfile
- You evaluated both and REA-Prompts fits your workflow better
About promptfoo
Promptfoo: LLM evals & red teaming promptfoo is a CLI and library for evaluating and red teaming LLM apps. Stop the trial and error approach start shipping secure, reliable AI apps. Website · Getting Started · Red Teaming · Documentation · Discord Promptfoo is now part of OpenAI. Promptfoo remains open source and MIT licensed. Read the company update. Quick Start Requires Node.js =22.22.0 for npm and npx usage. Node.js 24 LTS is recommended; see the runtime support guide. Also available via brew install promptfoo and pip install promptfoo . You can also use npx promptfoo@latest to run any command without…
read the full promptfoo overview →
About REA-Prompts
REA Investigation Prompts (REAP) — Reverse Engineering with your Coding Agent A curated collection of prompts for REA (Reverse Engineer Anything) — the toolset that lets your AI coding agent inspect how software works, from native binaries, firmware and kernels to games, Electron apps, APKs and websites. Prompts are ready to paste into your agent. Replace everything in and keep each request focused on one feature — narrow questions get evidence backed answers. Star History Install as agent skills (recommended) setup.sh (macOS/Linux) or setup.bat (Windows) copies every prompt section into your coding agent's…
read the full REA-Prompts overview →
More in AI & Machine Learning
Related comparisons
More AI Development Platforms projects
Compare either of these against the rest of the AI Development Platforms field.
Frequently asked questions
Is promptfoo or REA-Prompts more popular?
promptfoo has 26,429 GitHub stars and REA-Prompts has 2,507. promptfoo has the larger community by that measure.
Are promptfoo and REA-Prompts free?
Both are open source. promptfoo is licensed under MIT and REA-Prompts under MIT. Neither carries a licence fee.
What is the difference between promptfoo and REA-Prompts?
promptfoo is written in TypeScript and REA-Prompts in Batchfile. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, promptfoo or REA-Prompts?
Choose promptfoo if you want the larger community (26,429 stars) or its MIT licence terms. Choose REA-Prompts if its feature set, stack or MIT licence fits better. Both are self-hostable.