# PromptLens

> LLM prompt testing and evaluation platform for AI teams

PromptLens helps AI teams catch prompt regressions before they reach production. Compare a candidate prompt or model change against a known-good baseline, inspect the failures, and share the release decision.

## Features
- Run prompts against multiple LLM models simultaneously (OpenAI, Anthropic, Google Gemini, Azure OpenAI)
- Compare model outputs with automated quality scoring
- Track prompt versions and catch regressions with baseline comparisons
- Test with custom datasets and evaluate results at scale
- Share evaluation reports with stakeholders via public links

## Pricing
- Free: 3 projects, 50 evaluations/month
- Pro ($99/month): Unlimited projects and evaluations, priority support

## Key Pages
- https://www.promptlens.io/ — Homepage
- https://www.promptlens.io/compare — Compare PromptLens with alternatives
- https://www.promptlens.io/compare/promptlens-vs-promptfoo — PromptLens vs PromptFoo
- https://www.promptlens.io/compare/promptlens-vs-humanloop — PromptLens vs Humanloop
- https://www.promptlens.io/compare/promptlens-vs-braintrust — PromptLens vs Braintrust
- https://www.promptlens.io/compare/promptlens-vs-langsmith — PromptLens vs LangSmith
- https://www.promptlens.io/llm-regression-testing — Practical guide to LLM regression testing
- https://www.promptlens.io/guides — LLM evaluation guides
- https://www.promptlens.io/templates — LLM evaluation templates
- https://www.promptlens.io/integrations/openrouter — OpenRouter integration for model testing
- https://www.promptlens.io/benchmarks/support-triage-prompt-regression-july-2026 — Worked support triage regression benchmark
- https://www.promptlens.io/privacy — Privacy Policy
- https://www.promptlens.io/terms — Terms of Service

## Contact
- Website: https://www.promptlens.io
- GitHub: https://github.com/promptlens-io
- X/Twitter: https://x.com/promptlensio
- LinkedIn: https://linkedin.com/company/promptlens