
Free / Open-sourceBuild, deploy, and govern production-ready agentic AI workflows

Openlayer records 48,415 monthly visits with -6.4% month-over-month growth and Freemium, Contact for Pricing pricing. PromptLayer records 85,899 monthly visits with -4.6% growth and Free Trial, Contact for Pricing pricing.
AI governance, testing, and observability for regulated enterprises
| Dimension / Metric | ![]() | |
|---|---|---|
| Official Domain | openlayer.com | promptlayer.com |
| Pricing Model | Freemium, Contact for Pricing | Free Trial, Contact for Pricing |
| Monthly Visits | 48.42K (48,415) | 85.9K (85,899) |
| MoM Traffic Delta |
| -3.3K (-6.4%) |
| -4.18K (-4.6%) |
| Primary Market & Share | 🇺🇸 United States (44.1%) | 🇺🇸 United States (10.9%) |
|---|
| Direct Visits / mo | 25.94K | 14.09K |
|---|
| User Rating | 4.4 | 4.5 |
|---|
| Supported Platforms | Website | Website |
|---|
AI governance, testing, and observability for regulated enterprises
Dozens of pre-built evaluations cover quality, safety, security, and performance, with LLM-as-a-judge scorers, session-level metrics, and support for writing your own custom tests against your own data.
Import a repository and run evaluation suites automatically on every change, benchmark each iteration, and block releases when a metric regresses beyond the threshold you define.
Trace every request through multi-step agent workflows, including tool calls and retriever steps, with token counts, latency, cost per request, alerting integrations, and subpopulation analysis.
Register each AI system with an owner, purpose, data sensitivity, and risk tier, score inherent risk across multiple dimensions, and move systems through staged approval gates before they reach production.

The collaboration layer for AI engineering teams
Edit, version, diff and roll back prompts from a visual dashboard with no coding, so product, marketing and content teams can iterate on prompts while engineers keep control of the deploy.
Run dataset-backed tests with human and AI graders, trigger regression evals whenever a prompt changes, backtest new versions against historical data and compare prompts across models.
Connect production traces to the exact prompt version that produced them and inspect failures, cost, latency and token usage by feature, model or user.
Build, trace and improve agent workflows with prompts, tool calls, evaluations and logs in one place, so multi-step runs can be tested before they ship.

Free / Open-sourceBuild, deploy, and govern production-ready agentic AI workflows


Track, evaluate, and ship AI models and agents in one connected environment.


Free / Open-sourceAgent observability, evaluation, and continuous improvement for production AI
#3
SpecialistAttack-led AI security testing and red teaming

Free / Open-sourceBuild, simulate, evaluate and monitor self-improving AI agents

Free / Open-sourceEvaluate, monitor, and govern your AI applications in production

Standardize LLM evaluation, observability, and red teaming across your whole org
A multiplayer control plane for AI coding agents

Free / Open-sourceOpen-source workspace for building, evaluating and shipping AI agents

SpecialistThe control plane for trusted enterprise agents and models
Full-stack observability with an AI SRE agent that fixes issues

Enterprise AI governance platform for agents, models, and vendors
Free / Open-sourceBuild, deploy, and govern production-ready agentic AI workflows
Track, evaluate, and ship AI models and agents in one connected environment.
Free / Open-sourceAgent observability, evaluation, and continuous improvement for production AI
SpecialistAttack-led AI security testing and red teaming
Free / Open-sourceBuild, simulate, evaluate and monitor self-improving AI agents
Free / Open-sourceEvaluate, monitor, and govern your AI applications in production
Standardize LLM evaluation, observability, and red teaming across your whole org
A multiplayer control plane for AI coding agents
Free / Open-sourceOpen-source workspace for building, evaluating and shipping AI agents
SpecialistThe control plane for trusted enterprise agents and models
Full-stack observability with an AI SRE agent that fixes issues