PromptLayer

PromptLayer gives teams a central place to write, version and track the prompts behind their AI features. Product managers and domain experts can edit a prompt in a visual editor while engineers keep the code unchanged. It logs every request, so you can see what was sent, what came back, how much it cost and how long it took. Evaluation tools let you run a new prompt version against past examples before you ship it. PromptLayer has a free plan and paid team tiers. It is useful when non-engineers need a say in prompts and you want a record of every change.