Promptfoo vs Humanloop
Detailed side-by-side comparison to help you choose the right tool
Promptfoo
🔴DeveloperAI Evaluation
Open-source CLI and library for testing, evaluating, and red-teaming LLM prompts, models, and RAG pipelines — runs locally on your machine or in CI.
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FreeHumanloop
🔴DeveloperLLM evaluation and governance
an LLM development platform for prompt management, evaluations, logging, and trustworthy AI product iteration; the homepage announces the team joining Anthropic.
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DiscontinuedFeature Comparison
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Promptfoo - Pros & Cons
Pros
- ✓Truly local — prompts and datasets never leave your machine
- ✓MIT licensed core means no vendor lock-in or runtime cost
- ✓Red-team mode generates real OWASP-aligned attack suites automatically
- ✓Excellent provider coverage including Bedrock, Vertex, and self-hosted models
- ✓Config-as-code fits cleanly into existing CI/CD pipelines
Cons
- ✗YAML configs get unwieldy for very large eval suites without discipline
- ✗LLM-as-judge assertions can be flaky without careful grader prompts
- ✗Cloud tier pricing is not transparent on the public site
- ✗Web UI is meant for local inspection, not multi-user dashboards
Humanloop - Pros & Cons
Pros
- ✓Pricing page lists a free starting point: 2 members, 50 eval runs, and 10K logs per month.
- ✓Enterprise features include SSO/SAML, role-based access controls, SLA support, and VPC deployment add-on.
- ✓Strong fit for teams that need prompt engineering, evaluations, logs, and trustworthy LLM app iteration.
Cons
- ✗Homepage announces the Humanloop team is joining Anthropic and says the platform is being sunset, so new buyers must verify availability.
- ✗Enterprise pricing is custom and likely requires sales engagement.
- ✗No MCP support was visible in fetched pages.
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