Laminar
Open-source agent observability platform that captures LLM calls, tool calls, sub-agents, costs and tokens. Its Signals feature clusters agent failures automatically, and it also runs evals.
Active · Verified 2026-10-29 · fresh as of 2026-10-29 · 17 cited facts, 0 with a third-party source · 1 recorded change · Suggest a correction
At a glance
- Tier
- T3
- Created
- 2024-08-29 repo fix
- Latest release
- last commit 2026-10-16 repo fix
- License
- Apache-2.0 vendor fix
- GitHub
- https://github.com/lmnr-ai/lmnr (3460★) repo fix
- Pricing
- searched not found fix
- Funding
- searched not found fix
- Freshness
- 2026-10-29 fix
- Layer
- agent-infra repo fix
- Licensing
- open-source vendor fix
- SDK languages
- python, typescript registry fix
- Protocols
- mcp-server, opentelemetry repo fix
- Compliance
- hipaa, soc2-type2 vendor fix
When to use
Optimised for: searched not found
Anti-fit: searched not found
Pros & cons
Pros
searched not found
Cons
searched not found
Claims & capabilities
Introducing flow-1 Introducing flow-1 , frontier trace intelligence at 1/20th of the cost
Technical surface
- API surface
- searched not found
- Backend storage
- searched not found
- Deployment
- searched not found
- Embedding model
- searched not found
- Multi-tenancy
- searched not found
- MCP
- searched not found
- A2A
- searched not found
- OpenTelemetry
- yes
Similar systems
Other evaluation & observability platforms in the catalog, ranked by inbound references.
- Arize Phoenix T1
Arize AI's open-source LLM observability tool — OpenTelemetry-native LLM tracing, evals, datasets. Arize commercial offers Phoenix + Surveyor.
- Arize AI T1
Production ML monitoring + LLM observability (Arize AX) — drift, eval, root-cause. Pre-LLM observability leader; now LLM-pivoted.
- Braintrust T1
Eval-first LLM platform — datasets, eval runs, prompt playground, tracing. Founded by ex-Impira (acquired by Dropbox) team. Used by Notion, Brex, AirOps.
- Confident AI / DeepEval T2
Open-source DeepEval framework + Confident AI cloud — pytest-style eval runs, hallucination/relevance/bias metrics, datasets.
- OpenLLMetry (Traceloop) T2
Traceloop's open-source OpenTelemetry auto-instrumentation for LLM workflows — works with any OTel-compatible backend (Datadog, New Relic, Grafana, etc.).
- Helicone T2
Open-source LLM observability and AI gateway — one-line proxy integration captures every LLM call; sessions, custom properties, evals. Acquired by Mintlify in Mar 2026 and placed in maintenance mode; helicone.ai now states it is no longer part of Mintlify.
Sources (16 cited facts, 0 third-party)
Each fact links to the page it came from; the badge says who published it (how to read sources).
- What it is Product vendor
- What it does & what's distinct Open-source agent observability platform that captures LLM calls, tool calls, sub-agents… vendor
- Claims / benefits Introducing flow-1 Introducing flow-1 , frontier trace intelligence at 1/20th of the cost vendor
- Created 2024-08-29 repo
- Latest release last commit 2026-10-16 repo
- License Apache-2.0 vendor
- GitHub https://github.com/lmnr-ai/lmnr (3460★) repo
- Mindshare 3460 GitHub stars repo
- OTel yes repo
- Project & sources https://laminar.sh/ ; https://github.com/lmnr-ai/lmnr vendor
- obs-opentelemetry yes repo
- licensing-bucket open-source vendor
- taxonomy-three-layer-rollup agent-infra repo
- compliance-certifications hipaa,soc2-type2 vendor
- sdk-languages python,typescript registry
- protocol-support mcp-server,opentelemetry repo
What changed
Changes to this record's lifecycle, licence, release, pricing and hosting facts, from the catalog's git history. Subscribe (Atom)
- 2026-10-30 Added to the catalog #347
Related systems
References (24)
- Anthropic Claude (foundation models) integrates with — Laminar integrations docs have a Anthropic observability page. (verified 2026-10-29)
- Browser Use integrates with — Laminar integrations docs have a Browser Use observability page. (verified 2026-10-29)
- Claude Agent SDK integrates with — Laminar integrations docs have a Claude Agent SDK observability page. (verified 2026-10-29)
- Claude Code (Anthropic) integrates with — Laminar integrations docs have a Claude Code observability page. (verified 2026-10-29)
- Cohere Command R+ / Command A integrates with — Laminar integrations docs have a Cohere observability page. (verified 2026-10-29)
- Google Agent Development Kit (ADK) integrates with — Laminar integrations docs have a Google ADK observability page. (verified 2026-10-29)
- Google Gemini 3 family integrates with — Laminar integrations docs have a Gemini observability page. (verified 2026-10-29)
- LangChain (framework) integrates with — Laminar integrations docs have a LangChain and LangGraph observability page. (verified 2026-10-29)
- Langfuse integrates with — Laminar integrations docs have a Langfuse observability page. (verified 2026-10-29)
- LangGraph (orchestration) integrates with — Laminar integrations docs have a LangChain and LangGraph observability page. (verified 2026-10-29)
- LiteLLM integrates with — Laminar integrations docs have a LiteLLM observability page. (verified 2026-10-29)
- Mastra integrates with — Laminar integrations docs have a Mastra observability page. (verified 2026-10-29)
- Microsoft Agent Framework integrates with — Laminar integrations docs have a Microsoft Agent Framework observability page. (verified 2026-10-29)
- OpenAI Agents SDK integrates with — Laminar integrations docs have a OpenAI Agents SDK observability page. (verified 2026-10-29)
- OpenAI Codex CLI integrates with — Laminar integrations docs have a Codex observability page. (verified 2026-10-29)
- OpenAI GPT family (GPT-5 / GPT-4o / o3 / o4) integrates with — Laminar integrations docs have a OpenAI observability page. (verified 2026-10-29)
- Opencode (SST) integrates with — Laminar integrations docs have a OpenCode observability page. (verified 2026-10-29)
- OpenHands integrates with — Laminar integrations docs have a OpenHands SDK observability page. (verified 2026-10-29)
- OpenRouter integrates with — Laminar integrations docs have a OpenRouter observability page. (verified 2026-10-29)
- Pydantic-AI integrates with — Laminar integrations docs have a Pydantic AI observability page. (verified 2026-10-29)
- Skyvern integrates with — Laminar integrations docs have a Skyvern observability page. (verified 2026-10-29)
- Stagehand integrates with — Laminar integrations docs have a Stagehand observability page. (verified 2026-10-29)
- Temporal integrates with — Laminar integrations docs have a Temporal observability page. (verified 2026-10-29)
- Vercel AI SDK integrates with — Laminar integrations docs have a Vercel AI SDK observability page. (verified 2026-10-29)
Referenced by (2)
- OpenAI Agents SDK integrates with — OpenAI Agents SDK tracing docs list Laminar among external tracing processors. (verified 2026-10-29)
- TrueFoundry AI Gateway integrates with — TrueFoundry AI Gateway ecosystem lists a Laminar integration page. (verified 2026-10-29)