PromptLayer — Version and test your agents

PromptLayer is a platform for managing and monitoring LLM prompts at scale serving as a central repository for prompt templates versioning collaboration and performance tracking across AI applications. It acts as a middleware layer between applications and LLM providers like OpenAI and Anthropic while providing full visibility into prompt variations. PromptLayer supports prompt chaining for multi-step workflows automated prompt testing and A/B testing different prompt versions. Analytics features help teams identify which prompts perform best and track costs and latency across model providers.