PromptLayer
Prompt management, evaluation and observability for LLM applications
About PromptLayer
PromptLayer is a New York-based platform with a prompt registry, evaluations, observability and agent tracing for LLM applications. A no-code editor lets domain experts change prompts without changing application code.
Common use cases
- Prompt management
- Regression testing prompts
- Monitoring LLM cost and latency
- Domain expert collaboration
Products and services
Prompt Registry
Visual prompt CMS with versioning and rollback.
Evaluations
Regression and historical evals with A/B testing.
Observability
Cost, latency monitoring and agent tracing.
Key features
- Prompt versioning
- No-code prompt editor
- A/B testing
- Evals
- Agent tracing
- Cost monitoring
Integrations
- OpenAI
- Anthropic
- LangChain
- Python
- JavaScript
PromptLayer alternatives
FAQs
Where is it based?
New York City.
Who can edit prompts?
Domain experts via a no-code editor.
Is there a free plan?
Free sign-up is offered; see the pricing page for tiers.

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