head to head · open source
promptfoo vs AutoPrompt
promptfoo has 26,852 GitHub stars, 2,652 forks, 651 open issues and last shipped today. AutoPrompt has 3,022 stars, 265 forks, 23 open issues and last shipped 11 months ago. promptfoo leads on adoption by 789% (26,852 vs 3,022 stars). promptfoo is written in TypeScript under MIT; AutoPrompt is written in Python under Apache-2.0. promptfoo has attracted 10% as many forks as stars, AutoPrompt 9%. 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.
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Side by side
| promptfoo | AutoPrompt | |
|---|---|---|
| GitHub stars | ★ 27K | ★ 3.0K |
| License | MIT | Apache-2.0 |
| Written in | TypeScript | Python |
| Last push | 2026-11-05 | 2025-12-02 |
| Forks | ⑂ 2.7K | ⑂ 265 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick promptfoo if
- You weight community size — 27K stars and counting
- You want the MIT license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick AutoPrompt if
- You want the AutoPrompt feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Python
- You evaluated both and AutoPrompt 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 AutoPrompt
📝 AutoPrompt Auto Prompt is a prompt optimization framework designed to enhance and perfect your prompts for real world use cases. The framework automatically generates high quality, detailed prompts tailored to user intentions. It employs a refinement (calibration) process, where it iteratively builds a dataset of challenging edge cases and optimizes the prompt accordingly. This approach not only reduces manual effort in prompt engineering but also effectively addresses common issues such as prompt sensitivity and inherent prompt ambiguity issues. Our mission: Empower users to produce high quality robust…
read the full AutoPrompt overview →
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Frequently asked questions
Is promptfoo or AutoPrompt more popular?
promptfoo has 26,852 GitHub stars and AutoPrompt has 3,022. promptfoo has the larger community by that measure.
Are promptfoo and AutoPrompt free?
Both are open source. promptfoo is licensed under MIT and AutoPrompt under Apache-2.0. Neither carries a licence fee.
What is the difference between promptfoo and AutoPrompt?
promptfoo is written in TypeScript and AutoPrompt in Python. 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 AutoPrompt?
Choose promptfoo if you want the larger community (26,852 stars) or its MIT licence terms. Choose AutoPrompt if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.