A agentindex
Comparison

Patronus AI vs promptfoo

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

Patronus AI

Automated evaluation and guardrails for LLMs.

  • + Research-backed evaluation benchmarks
  • + Strong for enterprise compliance
  • − Proprietary and enterprise-priced
  • − Not a general observability tool

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 Patronus AI promptfoo
Role Evaluation Evaluation
Tags evaluation, guardrails, 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 paid free
Price Custom Free
Usage cost No model cost No model cost
Models multi multi
Languages python typescript
GitHub stars — 22.9k
Last activity — 2026-07-04