Is Promptfoo free for LLM observability & evals?

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

How much does Promptfoo cost for LLM observability & evals?

The open-source Community version is free; Enterprise and on-premise plans are custom-priced. At list prices: : $0/month (Self-hosted (open source)); : $0/month (Self-hosted (open source)); : $0/month (Self-hosted (open source)).

Promptfoo pricing

How Promptfoo 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.promptfoo.dev ↗ · USD, list prices

In short

The open-source Community version is free; Enterprise and on-premise plans are custom-priced.

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

The open-source CLI is free; hosting and model tokens for eval runs are yours. Red teaming in the free Community plan is capped at 10k probes/month; Enterprise and on-premise plans are contact sales.

Before you commit