PromptLayer

Free plan APISelf-hostedWeb

What PromptLayer is

PromptLayer is a platform for managing prompts and improving AI products, combining a visual prompt CMS and registry with evaluations, observability, and agent tracing. Teams can edit, version, test, and deploy prompts without waiting for an application redeploy, so domain experts and non-technical stakeholders can work with engineers. Evaluations can run when a prompt version changes, via API, or on demand in the UI; they include historical backtests and side-by-side model comparisons. PromptLayer tracks requests, traces, costs, latency, token usage, scores, and custom metadata, and supports OpenTelemetry spans. Its OpenAI integration includes versioned prompts, release labels, request monitoring, evaluations, and model comparisons. Free, Pro, and Team plans are hosted in the US; Enterprise offers self-hosting on GCP, AWS, or Azure, EU cloud hosting, or single-tenant cloud hosting. The Free plan costs nothing; Pro is $49 a month and Team is $500 a month. Enterprise pricing is custom.

Who it suits

PromptLayer suits engineers and domain experts building and improving AI products together. Its visual editing and collaboration workflow is also relevant to non-technical stakeholders who contribute to prompts.

What it does well

Edit and deploy prompts without an application redeploy.
Evaluations include historical backtests and model comparisons.
Tracks cost, latency, token use, scores, and traces.
Enterprise supports flexible hosting options.
Free plan includes 5 users and 2.5k monthly requests.

What to know first

Free includes only 10 prompts and 10 daily playground runs.
Webhooks are limited to Team and Enterprise.
Pro costs $49 a month.
Team costs $500 a month.

Limits

The Free plan costs nothing and includes 5 users, 2.5k requests per month, 1 workspace, 250 evaluation cell executions per month, and a 10MB maximum dataset. It also limits users to 10 prompts and 10 playground runs per day. Webhooks are available on Team and Enterprise.

Plans

Plan	Billed and limits	Price
Free	per month · 5 users · 2.5k requests/month · 1 workspace · 250 eval cell executions/month · 10MB max per dataset	Free
Pro	per month · 5 users · 2.5k+/month requests · unlimited workspaces and playgrounds · 150MB max per dataset · $0.003 per txn overage	$49 a month
Team	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	$500 a month
Enterprise	Custom · Custom limits · RBAC · deployment approvals · HIPAA with BAA · flexible hosting · dedicated support · data retention control	On request

As promptlayer.com lists them, read 30 Sept 2026. The maker's own page has the final word.

Getting started

Visit https://www.promptlayer.com/.
Choose a plan: Free costs nothing, Pro is $49 a month, Team is $500 a month, or contact PromptLayer about Enterprise.
Use the web platform or API; Enterprise also offers self-hosting or its listed hosting choices.

Verdict

PromptLayer brings prompt editing, evaluation, and operational monitoring into one workflow, with collaboration features for technical and non-technical contributors. The Free plan has defined prompt and playground limits, while larger teams can consider paid plans or Enterprise hosting options.

Questions

Is there a free plan?

Yes. Free costs nothing and includes 5 users, 2.5k requests per month, 1 workspace, 250 evaluation cell executions per month, and a 10MB maximum dataset.

What do the paid plans cost?

Pro costs $49 a month and Team costs $500 a month. Enterprise pricing is custom.

Which platforms does PromptLayer support?

The listed platforms are API, self-hosted, and web. Free, Pro, and Team are cloud-hosted in the US; Enterprise has additional hosting choices.

Does PromptLayer support integrations?

Its OpenAI integration supports versioned prompts, release labels, request observability, evaluations, and model comparisons.

Can I self-host PromptLayer?

Enterprise offers self-hosting on GCP, AWS, or Azure. It also offers EU cloud hosting or cloud-hosted single tenancy.

Who makes PromptLayer, and where is it based?

PromptLayer is headquartered in New York City. The company states that it maintains SOC 2 Type 2, HIPAA, and GDPR compliance; its pricing FAQ also lists CCPA certification.

Facts from PromptLayer's own pages

Collaboration: The visual workflow is designed to let domain experts and non-technical stakeholders edit prompts alongside engineers. · promptlayer.com, 30 Sept 2026
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. · promptlayer.com, 30 Sept 2026
Headquarters: PromptLayer says it is located in New York City. · promptlayer.com, 30 Sept 2026
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. · promptlayer.com, 30 Sept 2026
Integrations: The LangChain integration exports traces through OpenTelemetry and supports cost and latency analytics, searchable metadata, and turning traces into evaluation datasets. · promptlayer.com, 30 Sept 2026
Intended users: PromptLayer describes its platform as serving engineers and domain experts who build and improve AI products together. · promptlayer.com, 30 Sept 2026
Notable limits: Free includes 10 prompts and 10 playground runs per day, while webhooks are available on Team and Enterprise plans. · promptlayer.com, 30 Sept 2026
Observability: PromptLayer tracks requests, traces, cost, latency, token usage, scores, and custom metadata, with OpenTelemetry span support. · promptlayer.com, 30 Sept 2026
Product: PromptLayer combines a prompt registry and visual prompt CMS with LLM evaluations, observability, and agent tracing. · promptlayer.com, 30 Sept 2026
Prompt management: Teams can visually edit, version, test, and deploy prompts without waiting for an application redeploy. · promptlayer.com, 30 Sept 2026
Security and compliance: PromptLayer states that it maintains SOC 2 Type 2, HIPAA, and GDPR compliance; its pricing FAQ also lists CCPA certification. · promptlayer.com, 30 Sept 2026
Support: The pricing comparison lists basic support for Free, Pro, and Team, and dedicated support for Enterprise. · promptlayer.com, 30 Sept 2026