promptfoo

What it is

An open-source tool for testing and red-teaming prompts and AI apps — run the same prompts across models, compare answers, and catch regressions. Free and self-hosted.

Why I recommend it

The practical one: if you have built anything on top of a model, this is how you check a prompt change did not quietly make it worse.

Topics

#ai ethics #ai-risk #ai-safety #developer-tools #evaluation #free #open-source #prompts #red-teaming #technology-and-ethics #testing

Added Sep 17, 2026 · 0 opens