A agentindex
Comparison

Braintrust vs promptfoo

A like-for-like, spec-level comparison. Both entries are verified against their docs and repo.

Braintrust

Evals and prompt playground for serious teams.

  • + Excellent eval and scoring UX
  • + Strong for prompt-engineering-heavy teams
  • − Proprietary platform
  • − Self-host story limited

promptfoo

Test and red-team LLM apps, prompts, and agents.

  • + Red-team scanning for prompt injection and jailbreaks
  • + Compares prompts and models side by side with assertion-based testing
  • − Test authoring requires upfront investment
  • − CLI-first; no hosted dashboard
Spec Braintrust promptfoo
Role Evaluation Evaluation
Tags evaluation, persona-data-scientist, persona-platform-engineer evaluation, guardrails, persona-data-scientist, persona-platform-engineer
License Proprietary MIT
Open source No Yes
Self-hostable No Yes
MCP support No No
Pricing freemium free
Price Free tier Free
Usage cost Included No model cost
Models multi multi
Languages python, typescript typescript
GitHub stars — 22.9k
Last activity — 2026-07-04