Google Stax is free, with no paid plan attached. Laminar is free, with no paid plan attached. Both are listed under LLM Eval & Observability, so this is a like-for-like comparison. Neither is ranked above the other — Flocci carries no sponsored placement.
Google Stax is free, with no paid plan attached and is listed for build evals with human raters or LLM autoraters on your own data. Laminar is free, with no paid plan attached and is listed for open-source observability and evals platform for AI agents (Apache-2.0). Both sit in LLM Eval & Observability.
Neither — Google Stax and Laminar are both free, so the choice comes down to capability rather than cost. Both entries list what they uniquely do above.
Choose Google Stax if you need build evals with human raters or LLM autoraters on your own data; choose Laminar if you need open-source observability and evals platform for AI agents (Apache-2.0). Flocci AI Tools does not rank one above the other — it shows both feature sets side by side and lets the requirement decide.
| Google Stax | Laminar | |
|---|---|---|
| Pricing tier | Free | Free |
| Free to start | Yes | Yes |
| Category | AI Models & Local Execution | AI Models & Local Execution |
| Type | LLM Eval & Observability | LLM Eval & Observability |
| Listed capabilities |
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| Tags | google stax, llm evaluation tool, free prompt evaluation, llm as judge autoraters, compare llm prompts | laminar lmnr, agent observability, open source agent tracing, browser agent tracing |
| Website | stax.withgoogle.com | github.com |
| Full page | Google Stax details → | Laminar details → |
| Alternatives | Google Stax alternatives → | Laminar alternatives → |