Laminar

Free plan APISelf-hostedWeb

What Laminar is

Laminar is an open-source observability and debugging platform for AI agents, built on OpenTelemetry. It records LLM calls, tool use, custom functions, and sub-agents, then shows activity as readable transcripts. Signals can identify outcomes and failures described in plain language and turn them into structured events across traces. Its debugger replays a run from cached results up to the point being investigated. Teams can run evaluations on datasets locally or in CI to catch regressions.

The platform includes realtime traces, full-text search, raw SQL access through the UI, CLI, or MCP, and custom dashboards. Documented integrations include OpenAI, Anthropic, Gemini, Cohere, LiteLLM, Vercel AI SDK, LangChain, Pydantic AI, Claude Code, Codex, Browser Use, Stagehand, and Playwright. Laminar is offered as managed cloud software or for self-hosting, including on AWS or GCP with Helm charts. It states that it is HIPAA and SOC 2 Type II compliant, and offers server-side PII redaction on eligible plans. Plans start with Free; paid plans start at $30/mo.

Who it suits

Laminar suits teams building AI agents that need to inspect model calls, tools, functions, and sub-agents. It also fits teams that want to evaluate datasets locally or in CI, search traces, or host the platform themselves.

What it does well

Traces LLM calls, tools, custom functions, and sub-agents.
Readable transcripts help inspect agent runs.
Cached replay supports debugging up to a point under investigation.
Evaluations can run locally or in CI.
Offers managed cloud and self-hosting.
Raw SQL access is available through the UI, CLI, or MCP.

What to know first

Free includes 1 GB of data and 7-day retention.
Free is limited to 1 project and 1 seat.
Free and Starter default Privacy Mode to off.
PII redaction is best-effort and applies to model input and output.

Limits

The Free plan includes 1 GB of data with no overage, 7-day retention, one project, and one seat. Starter costs $30 a month and includes 3 GB of data, then $2 / GB, 30-day retention, unlimited projects, and unlimited seats.

Plans

Plan	Billed and limits	Price
Free	$0/ month · 1 GB data · no overage · $5 one-time Signals credit · 7 day retention · 1 project · 1 seat · Community support	Free
Pro	$150/ month · 10 GB data included · then $1.50 / GB · $5 one-time Signals credit · 6 month retention · Unlimited projects · Unlimited seats · Slack support	$150 a month
Starter	$30/ month · 3 GB data included · then $2 / GB · $5 one-time Signals credit · 30 day retention · Unlimited projects · Unlimited seats · Email support	$30 a month
Enterprise	Custom · Custom limits · On-premise · Unlimited projects · Unlimited seats · Dedicated support	On request

As laminar.sh lists them, read 3 Oct 2026. The maker's own page has the final word.

Getting started

Open https://laminar.sh/.
Choose managed cloud or self-hosted deployment.
For self-hosting, use the AWS or GCP Helm chart option.
Choose a plan: Free, Starter, Pro, or Enterprise.
Connect a documented integration such as OpenAI, Anthropic, LangChain, or Pydantic AI.

Verdict

Choose Laminar if you need OpenTelemetry-native tracing and debugging for AI agents, with evaluations and cloud or self-hosted deployment options. The Free plan has one project, one seat, 1 GB of data, and 7-day retention; teams needing more data or longer retention can consider the paid plans, starting at $30/mo.

Questions

Is Laminar open source?

Yes. Laminar is described as an open-source platform.

Is there a free plan?

Yes. Free costs nothing and includes 1 GB of data, 7-day retention, one project, and one seat.

What do the paid plans cost?

Starter is $30 a month and Pro is $150 a month. Enterprise is billed at a custom price.

Which platforms does Laminar support?

The listed platforms are API, self-hosted, and web.

Can Laminar be self-hosted?

Yes. Laminar offers self-hosting, including deployments on AWS or GCP with Helm charts.

Which integrations are documented?

They include OpenAI, Anthropic, Gemini, Cohere, LiteLLM, Vercel AI SDK, LangChain, Pydantic AI, Claude Code, Codex, Browser Use, Stagehand, and Playwright.

Facts from Laminar's own pages

Company: Y Combinator lists Laminar as founded in 2024 and located in London, United Kingdom. · ycombinator.com, 3 Oct 2026
Data tools: The platform offers realtime traces, full-text search, raw SQL access through the UI, CLI or MCP, and custom dashboards. · laminar.sh, 3 Oct 2026
Debugger: The debugger can replay a run from cache up to the point being tested, with prior calls served from cache. · laminar.sh, 3 Oct 2026
Deployment: Laminar offers managed cloud and self-hosting; its site says self-hosted deployments can run on AWS or GCP with Helm charts. · laminar.sh, 3 Oct 2026
Evaluations: Users can run evaluations against datasets locally or in CI to catch regressions. · laminar.sh, 3 Oct 2026
Integrations: Documented integrations include OpenAI, Anthropic, Gemini, Cohere, LiteLLM, Vercel AI SDK, LangChain, Pydantic AI, Claude Code, Codex, Browser Use, Stagehand, Playwright, and others. · laminar.sh, 3 Oct 2026
Privacy: Privacy Mode defaults to off on Free and Starter, on for Pro and higher, and on and unchangeable for accounts covered by a signed DPA; when enabled, Customer Data is not used to train or improve its machine-learning models. · laminar.sh, 3 Oct 2026
Privacy limits: The privacy notice says PII redaction is best-effort and applies to model input/output content, so customers should not rely on it as their only safeguard. · laminar.sh, 3 Oct 2026
Product: Laminar is an open-source, OpenTelemetry-native observability and debugging platform built for AI agents. · laminar.sh, 3 Oct 2026
Security: Laminar states it is HIPAA and SOC 2 Type II compliant and offers server-side PII redaction on eligible plans. · laminar.sh, 3 Oct 2026
Signals: Signals let users describe outcomes and failures in plain language and extract structured events across traces. · laminar.sh, 3 Oct 2026
Support: The listed support options are community support on Free, email on Starter, Slack on Pro, and dedicated support for Enterprise. · laminar.sh, 3 Oct 2026
Tracing: It traces LLM calls, tool use, custom functions, and sub-agents, and presents traces as readable transcripts. · laminar.sh, 3 Oct 2026