The first platform built for prompt engineering — versioning, logging, and A/B testing for LLM calls.
PromptLayer records every LLM call your app makes, lets you version prompts, and test variants side by side — the fastest way to stop guessing about what works.
Who it's for: Indie hackers and engineering teams who ship LLM features and need to see what's actually happening in production.
Every prompt and completion, searchable and replayable.
Tag and compare prompt versions over time.
Split traffic between prompt variants and measure quality.
Share logs and prompts with your whole team.
PromptLayer is the lowest-friction way to get visibility into your LLM app. If you're flying blind on what your prompts actually return, install it today — the free tier is plenty to start.