Respan
Free plan with the full LLM observability and evals platform: 100k logs, 1k scores, 5 datasets, 2 evaluators and 5 prompts.
Dev Tools
What you get
Full-platform LLM tracing, logging and evals with 100k logs, 1k scores, 5 datasets, 2 evaluators and 5 prompts.
How to get it
Sign up for free on the Respan pricing page.
What it requires
No credit card required.
The catch
Logs are kept for 7 days and ingestion is capped at 412 logs a minute; the page does not say whether the log and score allowances reset monthly.
From the official page · checked Oct 24, 2026