PromptLayer

PromptLayer is a prompt management and LLMOps observability platform designed to help engineering teams build and manage production AI applications.

Acting as an intelligent middleware proxy between software applications and LLM APIs, PromptLayer logs every model request, capturing prompt inputs, model responses, latency, and monetary token costs.

Developers can visually collaborate on prompt templates in a dedicated CMS, conduct A/B testing across model versions, run backtesting suites on historical datasets, and deploy prompt updates without code deployments.