PromptLens
Stop guessing which prompt works best
- Launched September 11, 2026
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Stop guessing which prompt works best
Top upvoted of the last 30 days
Top upvoted of the last 30 days
PromptLens empowers prompt engineers and AI devs to optimize LLM prompts with data-driven precision. Compare prompts across OpenAI, Anthropic, and Google Gemini via side-by-side A/B tests on custom datasets, with real-time visualizations of wins, losses, and ties. Features include multi-provider API integration (no lock-in), JSON dataset uploads or in-app creation with expected outputs for regression testing, live result streaming with charts, and strong privacy: encrypted keys, no logging, full data ownership.
