# Laminar

Open-source observability and evals platform for AI agents (Apache-2.0). Laminar is free, with no paid plan attached, at github.com.

## Facts

- **Pricing tier:** Free
- **Works on:** Web, Self-hosted, API
- **Works in browser:** Yes

## Capabilities

- Open-source observability and evals platform for AI agents (Apache-2.0)
- Traces, session replay for browser agents and evaluations
- Self-hostable

## FAQ

### What is Laminar?

Laminar is listed under LLM Eval & Observability, in the AI Models & Local Execution category on Flocci AI Tools. Open-source observability and evals platform for AI agents (Apache-2.0). It is free, with no paid plan attached, and it lives at github.com.

### Is Laminar free?

Laminar is listed as fully free — there is no paid tier attached to it in the catalog. That makes it one of the 397 entries on Flocci AI Tools with no upgrade path built in.

### Can I use Laminar in a browser, or is there an app?

Laminar works in a normal browser tab with no install. It is available on the web, self-hosting and an API.

### What can Laminar do?

Laminar does 3 things the catalog singles out: Open-source observability and evals platform for ai agents (apache-2.0); traces, session replay for browser agents and evaluations; self-hostable.

### What is the best free alternative to Laminar?

Arize Phoenix is the closest free alternative: it sits in the same LLM Eval & Observability sub-category and is free. Google Stax, DeepEval and EleutherAI LM Evaluation Harness also start free. The full list is on the alternatives page.

## Related

- [Laminar alternatives](https://aitools.flocci.in/alternatives/laminar)
- [LLM Eval & Observability](https://aitools.flocci.in/category/ai-models-local-execution/llm-eval-observability)
- [Best free LLM evaluation and observability tools](https://aitools.flocci.in/best/best-llm-eval-observability)
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Source: Flocci AI Tools — https://aitools.flocci.in/tool/laminar

Facts last verified: October 2026