Laminar
Laminar: A broad observability platform for tracing agents, costs, failures, and evaluations. Ranked #8 of 26 in LLM Observability Tools by our editors (8.7/10); pricing: Free plan; best for developers focused on deep trace investigation.
At a glance
- Editor score8.7 / 10
- PricingFree plan
- Best forDevelopers focused on deep trace investigation
- Free planYes
- Paid from$30/mo
- LLM tracingYes
- Facts checked20 Sep 2026
Where it wins
- Traces LLM calls, tool calls, and sub-agent activity
- Combines failure signals, evaluations, prompt experiments, and SQL access
- Offers cloud and self-hosted deployment, including on-premise for Enterprise
Where it doesn't
- Free retention is limited to 7 days
- Starter and Pro require monthly subscriptions
- Enterprise pricing and limits are custom
Our verdict on Laminar
Laminar is an open-source observability platform for AI agents and LLM applications. It captures LLM calls, tool calls, sub-agent activity, token usage, costs, and application traces in a transcript-style interface. Developers investigating complex agent behavior get a broad set of tools for tracing, search, failure analysis, evaluations, prompt management, and browser-session recording. It is available through the web, API, or self-hosted deployment.
Its standout strength is the depth of investigation available around a trace. Signals can detect and cluster failure patterns, while full-text search covers trace inputs, outputs, and attributes. SQL access extends analysis to traces and signal events. Dataset-based evaluations with custom evaluators support change assessment, and the prompt playground provides experimentation with saved versions. Integrations include Claude Agent SDK, OpenAI Agents SDK, Mastra, Pydantic AI, AI SDK, LangChain, OpenHands SDK, Browser Use, Stagehand, Playwright, Anthropic, OpenAI, and LiteLLM. This breadth suits teams working across multiple agent frameworks and model providers.
The pricing structure gives smaller teams a way to start at no monthly cost, with the Free plan providing 1 GB of data, 7-day retention, 1 project, 1 seat, and community support. Starter costs $30 per month and adds 3 GB of included data, 30-day retention, unlimited projects and seats, and email support. Pro costs $150 per month and includes 10 GB of data, 6-month retention, unlimited projects and seats, and Slack support. Enterprise has custom limits, unlimited projects and seats, dedicated support, and on-premise deployment. Laminar is a strong fit for developers who need detailed trace investigation; teams wanting only lightweight monitoring may prefer a narrower tool.
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Laminar pricing
All 4 Laminar plans and prices →
Laminar fact sheet
| Free plan | Yes |
|---|---|
| Paid from | $30/mo |
| LLM tracing | Yes |
| LLM evaluations | Yes |
| Prompt management | Yes |
| Agent tracing | Yes |
| Retrieval tracing | Yes |
| Token cost tracking | Yes |
| Deployment options | Both |
| Deployment | Cloud, Self-hosted |
| Platforms | Web |
| Compliance & security | SOC 2, HIPAA |
| Support | Email, Community, Docs |
| Built for | Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 13 integrations: Claude Agent SDK, OpenAI Agents SDK, Mastra, Pydantic AI, AI SDK, LangChain … |
| Pricing | Free plan (source) |
| Website | laminar.sh |
| Facts checked | 20 Sep 2026 |
Laminar integrations
Laminar lists 13 integrations on its own site.
- Claude Agent SDK
- OpenAI Agents SDK
- Mastra
- Pydantic AI
- AI SDK
- LangChain
- OpenHands SDK
- Browser Use
- Stagehand
- Playwright
- Anthropic
- OpenAI
- LiteLLM
Alternatives to Laminar
- Arize AXBroad LLM observability with tracing, evaluations, prompts, agents, RAG, and cost tracking.9.4
- LangfuseA broad observability platform with open-source deployment and accessible paid tiers.9.3
- Arize PhoenixA free platform for tracing, evaluating, and improving LLM applications.9.2
See all Laminar alternatives →
Laminar vs the competition
- Laminar vs Arize AX
- Laminar vs Langfuse
- Laminar vs Arize Phoenix
- Laminar vs Opik
- Laminar vs W&B Weave
- Laminar vs LangSmith
Compare Laminar with any tool side by side →
Also Ranked In
Laminar is ranked in 5 of our directories.
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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