Laminar

Open-source observability platform for AI agents (YC S24). It captures LLM calls, tool calls, sub-agents, costs and tokens in a readable trace view, and its Signals feature uses Laminar's own flow-1 model to find and cluster agent failures you didn't define in advance. Integrations include the Claude Agent SDK, OpenAI Agents SDK, Mastra, Pydantic AI, AI SDK and LangChain.

Use case

Agent frameworks

Pricing tier

Freemium

Pricing note

Free plan at $0/month (1 GB data, 7-day data access, 1 project, no Signals); Starter $30/month and Pro $150/month; Enterprise custom.

Skill level*

Intermediate

License

Apache-2.0

Added

2026-10-20

Sources checked

• laminar.sh
• laminar.sh/pricing
• github.com/lmnr-ai/lmnr
• news.ycombinator.com/item?id=50154029

* Skill level and vibe badges are our own editorial labels. Pricing and plans change often; always confirm on the official site. Last checked 2026-10-20.