PromptLens

Input—per 1M tokens

Output—per 1M tokens

Context—tokens

WeightsClosed

About

PromptLens is ranked #11 of 25 in prompt management software on Inferse. It runs on Web. There is a free plan. Paid plans start at $99/mo.

Compared on prompt management software

Free plan: Yespromptlens.io
Prompt testing: Yespromptlens.io
Access controls: Yespromptlens.io

Facts

What it does: PromptLens provides prompt management, evaluations, and observability for teams shipping production LLM workflows.promptlens.io · 2 Oct 2026
Evaluation workflow: Teams can compare a candidate prompt version with the production version on the same dataset, then review score changes, outputs, and failures.promptlens.io · 2 Oct 2026
Scoring: An LLM judge compares each output to an expected answer and returns pass or fail with a short explanation.promptlens.io · 2 Oct 2026
Prompt management: PromptLens lets users version prompts and publish the version their application needs through a retrieval API.promptlens.io · 2 Oct 2026
Observability: The site says its observability product traces production model calls, tools, and retrieval, including timing, errors, usage, and cost.promptlens.io · 2 Oct 2026
Model providers: The homepage lists OpenAI, Anthropic, Google, xAI, Meta, DeepSeek, Mistral, Cohere, and Amazon among the model providers teams can test across.promptlens.io · 2 Oct 2026
Model access: Organizations can connect a provider API key or use purchased credits to run models through OpenRouter without adding a key.promptlens.io · 2 Oct 2026
Shared reports: Anyone with a shared report link can open it without an account or paid seat, and shared report links are unlimited on every plan.promptlens.io · 2 Oct 2026
Release control: Evaluations provide evidence and warnings for release decisions, but they are not an automatic CI release gate.promptlens.io · 2 Oct 2026
Security: The privacy policy says sensitive data is encrypted at rest, data is transmitted over HTTPS, and access to user data is restricted to authorized personnel.promptlens.io · 2 Oct 2026
Data retention: Users can delete datasets, prompts, and experiments at any time; after account deletion, PromptLens says it will delete the user's data within 30 days.promptlens.io · 2 Oct 2026
Cookies: The privacy policy says PromptLens uses essential cookies for sessions and preferences and does not use tracking or advertising cookies.promptlens.io · 2 Oct 2026
Support: The Free plan includes email support, Pro includes priority email support, and Teams includes dedicated support.promptlens.io · 2 Oct 2026
Availability: The evaluations page says product access is subject to early-access approval.promptlens.io · 2 Oct 2026