Pick Braintrust if
aI teams who will write a scorer and pay when processed data or scores blow past Starter.
Read the Braintrust pageBraintrust vs Langfuse
Our take
Pick Braintrust if aI teams who will write a scorer and pay when processed data or scores blow past Starter. Pick Langfuse if teams shipping LLM apps who need traces and a cost tile, not another chat UI. Skip Braintrust if developers who only want a $0 request table (Helicone). Skip Langfuse if people who only want a gateway (LiteLLM) or a framework (LangChain) without an observability SKU.
Best for
Braintrust Measure the agent before you ship
Langfuse Debug and cost-track generations
Free plan
Braintrust $0 · /month. $10 model credits + token rates. 1 GB processed data, then $4/GB. 10k scores, then $2.50/1k. 14-day retention. Unlimited users, projects, datasets, playgrounds, experiments. No credit card
Langfuse $0 · for the MIT core. ee/ is not the community license
Lowest paid
Braintrust Pro $249/mo
Langfuse Enterprise $2/mo
Next step up
Braintrust
Langfuse Core $29/mo
Coding agent
Braintrust Loop agent
Langfuse
Runs where
Braintrust
Langfuse Local or hosted
Watch out
Braintrust $0 is the platform fee
Langfuse Hobby is two users and 30-day retention
Last checked
Braintrust 2026-10-22 · braintrust.dev/pricing
Langfuse 2026-10-19 · langfuse.com/pricing
Which one, then?
Pick Langfuse if
teams shipping LLM apps who need traces and a cost tile, not another chat UI.
Read the Langfuse page