PromptLayer
Maintain a log of your prompts and OpenAI API requests.
At a glance
Free + paid · Source review 2026-11-01- Price & billing
Verified on the official pricing page reviewed on 2026-11-01: the Free plan costs $0 per month with 2.5k requests per month, and Pro costs $49 per month. Recheck official pricing before purchase.
- Free allowance
Verified on the official pricing page reviewed on 2026-11-01: the Free plan costs $0 per month with 2.5k requests per month, and Pro costs $49 per month.
- Best suited to
AI engineering teams managing prompts, evals, and observability
Fit is editorial guidance, not a measured result.- Platforms
Access: not separately verified. Operating systems not separately verified.
Published-source facts and editorial guidance. No product test is implied. Confirm current conditions before purchase.
No product screenshot is claimed for this listing. Use the official website ↗ to inspect the current interface.
What to know before choosing
Good fit
AI engineering teams managing prompts, evals, and observability
Limits and trade-offs
The reviewed pricing page lists Team and Enterprise tiers beyond the Free and Pro facts; only Free and Pro were adopted.
Plans and free allowances
Verified on the official pricing page reviewed on 2026-11-01: the Free plan costs $0 per month with 2.5k requests per month, and Pro costs $49 per month. Recheck official pricing before purchase.
Evidence
Official pricing page ↗ (reviewed 2026-11-01)
Official published page review; no authenticated product test
Dates: Last reviewed 2026-11-02 · Sources checked 2026-11-01. Last reviewed is the latest source or editorial review date; it is not a content-change date.
A closer look at PromptLayer
PromptLayer is the collaboration layer for AI engineering teams: a prompt CMS, eval harness, and observability stack to visually edit, version, test, and deploy prompts without waiting for an application redeploy, with domain experts collaborating without touching the codebase.
Editorial guidance based on published documentation. The workflow below is a suggested starting point, not a measured product result.
When to choose PromptLayer
- AI engineering teams versioning and testing prompts
- Teams where domain experts must collaborate without touching code
When to choose something else
- Solo users who only need a simple prompt library
- Teams that need more than 2.5k requests per month on the Free plan, since Free costs $0 per month with 2.5k requests per month
A practical starting workflow
- Create and visually edit prompts in the registry
- Test them with the eval harness
- Deploy without an application redeploy and observe usage
Check before committing
- Vendor claims on the official page are not guarantees; actual results, quality and availability must be tested in the product.
- Prices and features may change after this review; recheck the official site before purchase or signup.
Common questions
What is PromptLayer?
It is the collaboration layer for AI engineering teams: a prompt CMS, eval harness, and observability stack.
What can I do without a redeploy?
Visually edit, version, test, and deploy prompts without waiting for an application redeploy.
What does Free include?
Free costs $0 per month with 5 users, 2.5k requests per month, 1 workspace, and 250 eval cell executions per month.
What does Pro cost?
Pro costs $49 per month for small teams, with unlimited playgrounds and workspaces.
Compare approaches for this task
- 0Cody — Developers who want a second pair of eyes while working through unfamiliar code in real time.
- Abliteration — People whose work matches the core job in the description: Unrestricted LLM API with policy-as-code governance for enterprises.
Sources and checks
Last source review is not a date of product testing. No rating or test result is implied by inclusion. Check the current plan and terms before buying.