Laminar review
A broad observability platform for tracing agents, costs, failures, and evaluations.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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.
Laminar pros and cons
- 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
Laminar fact sheet, pricing and score →
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
Last updated · How we research and update