Is Ragas free for LLM observability & evals?

Yes, Self-hosted (open source) costs nothing.

How much does Ragas cost for LLM observability & evals?

A free open-source Python library with no hosted product or pricing. At list prices: : $0/month (Self-hosted (open source)); : $0/month (Self-hosted (open source)); : $0/month (Self-hosted (open source)).

Ragas pricing

How Ragas charges, what to know before you commit, and what you'd pay at your usage — next to what the alternatives would cost for the same thing.

How it charges

Checked 2026-10-03 on www.ragas.io ↗ · USD, list prices

In short

A free open-source Python library with no hosted product or pricing.

Free plan: Yes
Side project: $0/mo Self-hosted (open source)
Growing: $0/mo Self-hosted (open source)
Scaling: $0/mo Self-hosted (open source)

What the model leaves out

A free open-source Python library with no hosted product; compute and the LLM tokens its judged metrics use are yours.

Plan	Monthly fee
Self-hosted (open source)	Free

What you'd pay

Usage only some alternatives charge for

Traces per month100k traces

Self-hosted (open source)Within the free allowance$0/mo

The same usage elsewhere

LangfuseCore$29+$29

Arize Phoenixover limits—

HeliconePro$116+$116

LangSmithDeveloper$475+$475

Cost as you grow

Ragas LangSmith Helicone Arize Phoenix Langfusex: traces per month (trace) · cheapest usable plan at each point, list prices

All LLM observability & evals pricing, compared →Which one fits your situation →