tool:PromptLayer
PromptLayer is a prompt management, observability, and evaluation platform that lets teams version, test, deploy, and monitor LLM prompts without shipping new application code each time. It started as a logging wrapper and has grown into a prompt-registry workflow with Tables, evaluations, tool registry, and team governance features for product managers, domain experts, and engineers working on prompts together.
Raşit Akyol · May 13, 2026
overall78Best for small-to-mid teams that want prompt versioning, request observability, and built-in evaluation workflows without building internal tooling. The current free tier is $0/month with 5 users, 2.5K requests, 250 eval cell executions, and one workspace; Pro is $49/month and Team is $500/month with higher team-scale quotas. Teams needing self-hosted control, very high-volume agent tracing, or eval governance as deep as Braintrust, Humanloop, Langfuse, or LangSmith should still compare alternatives before committing long term.