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PromptLayer

promptlayer.com

From $49/mo Free plan WebAPISelf-hosted
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Spec score 7.8 #6 of 25 in Prompting Tool

What it is

PromptLayer combines a prompt registry and visual prompt CMS with evaluations, observability, and agent tracing for teams building AI products. Teams can visually edit, version, test, and deploy prompts without waiting for an application redeploy, allowing domain experts and non-technical stakeholders to work alongside engineers. Evaluations can run when prompt versions change, through the API, or on demand in the UI. They include historical backtests and side-by-side model comparisons. Tracking covers requests, traces, cost, latency, token usage, scores, and custom metadata, with OpenTelemetry span support. The OpenAI integration includes versioned prompts, release labels, request observability, evaluations, and model comparisons. Free, Pro, and Team are cloud-hosted in the US; Enterprise offers self-hosting on GCP, AWS, or Azure, EU cloud hosting, or single-tenant cloud hosting. PromptLayer states that it maintains SOC 2 Type 2, HIPAA, GDPR, and CCPA compliance. Free costs nothing, Pro costs $49 a month, and Team costs $500 a month. Enterprise pricing is custom.

Spec sheet

Product
PromptLayer combines a prompt registry and visual prompt CMS with LLM evaluations, observability, and agent tracing.Read 30 Sep 2026 · promptlayer.com
Intended users
PromptLayer describes its platform as serving engineers and domain experts who build and improve AI products together.Read 30 Sep 2026 · promptlayer.com
Integrations
The LangChain integration exports traces through OpenTelemetry and supports cost and latency analytics, searchable metadata, and turning traces into evaluation datasets.Read 30 Sep 2026 · promptlayer.com
Support
The pricing comparison lists basic support for Free, Pro, and Team, and dedicated support for Enterprise.Read 30 Sep 2026 · promptlayer.com
Headquarters
PromptLayer says it is located in New York City.Read 30 Sep 2026 · promptlayer.com
Collaboration
The visual workflow is designed to let domain experts and non-technical stakeholders edit prompts alongside engineers.Read 30 Sep 2026 · promptlayer.com
Evaluation
Evaluations can be triggered on new prompt versions, through the API, or ad hoc in the UI, and include historical backtests and side-by-side model comparisons.Read 30 Sep 2026 · promptlayer.com
Hosting
Free, Pro, and Team are cloud-hosted in the US; Enterprise offers self-hosting on GCP, AWS, or Azure, EU cloud hosting, or cloud-hosted single tenancy.Read 30 Sep 2026 · promptlayer.com
Notable limits
Free includes 10 prompts and 10 playground runs per day, while webhooks are available on Team and Enterprise plans.Read 30 Sep 2026 · promptlayer.com
Observability
PromptLayer tracks requests, traces, cost, latency, token usage, scores, and custom metadata, with OpenTelemetry span support.Read 30 Sep 2026 · promptlayer.com
Prompt management
Teams can visually edit, version, test, and deploy prompts without waiting for an application redeploy.Read 30 Sep 2026 · promptlayer.com
Security and compliance
PromptLayer states that it maintains SOC 2 Type 2, HIPAA, and GDPR compliance; its pricing FAQ also lists CCPA certification.Read 30 Sep 2026 · promptlayer.com

Plans and prices

Free Free per month 5 users · 2.5k requests/month · 1 workspace · 250 eval cell executions/month · 10MB max per dataset Read 30 Sep 2026 · promptlayer.com
Pro $49 a month per month 5 users · 2.5k+/month requests · unlimited workspaces and playgrounds · 150MB max per dataset · $0.003 per txn overage Read 30 Sep 2026 · promptlayer.com
Team $500 a month per month 25 users · 100k+/month requests · 7.5k+/month eval cell executions · unlimited workspaces and playgrounds · 1GB max per dataset · $0.002 per txn overage Read 30 Sep 2026 · promptlayer.com
Enterprise Priced on request Custom Custom limits · RBAC · deployment approvals · HIPAA with BAA · flexible hosting · dedicated support · data retention control Read 30 Sep 2026 · promptlayer.com

Every PromptLayer plan and price →

Strong points and limits

Strong points

  • Prompts can be deployed without an application redeploy.
  • Evaluations include historical backtests and model comparisons.
  • Observability tracks cost, latency, tokens, and custom metadata.
  • Enterprise offers self-hosting and EU cloud hosting.

Limits

  • Free plan includes only 10 prompts.
  • Free plan limits playground runs to 10 per day.
  • Webhooks are available only on Team and Enterprise.
  • Enterprise pricing is custom.

Who it suits

PromptLayer is for engineers and domain experts who build or improve AI products together. Its visual editing and evaluation tools can suit teams that want non-engineers to contribute to prompt work.

Verdict

PromptLayer combines prompt lifecycle management with evaluations and request tracing, with cloud hosting for Free, Pro, and Team and flexible Enterprise hosting. Pro is $49 a month, while Team is $500 a month; Enterprise pricing is custom.

Where Specifiction places it

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