Softwr

Software · head to head

Braintrust vs Langfuse

B

Braintrust

Software

The active observability platform for agents

From
On request
Rated
-
Full reviewWebsite
L

Langfuse

Software

Simple pricing for projects of all sizes

From
On request
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Braintrust the free Starter tier includes only $10 of monthly model credits, 1 GB of processed data, and 10,000 scores before overage charges of $4 per GB and $2.50 per 1,000 scores apply, as of August 2026.; Langfuse billing is metered per unit, where a unit is any trace, observation, or score sent to the platform; the free Hobby tier includes only 50,000 units per month before graduated per-unit charges apply, as of August 2026.

Where they differ

Only the attributes on which Braintrust and Langfuse actually diverge.

Attributes where Braintrust and Langfuse differ
AttributeBraintrustLangfuse

Identical on both: starting price (On request), pricing model (usage-based), free tier (No), platforms (Web), user rating (Not yet rated), category (Unknown).

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Braintrust

  • The free Starter tier includes only $10 of monthly model credits, 1 GB of processed data, and 10,000 scores before overage charges of $4 per GB and $2.50 per 1,000 scores apply, as of August 2026.

Langfuse

  • Billing is metered per unit, where a unit is any trace, observation, or score sent to the platform; the free Hobby tier includes only 50,000 units per month before graduated per-unit charges apply, as of August 2026.

Pricing, plan by plan

Braintrust

On request

No published plan breakdown. See the Braintrust review.

Langfuse

On request

No published plan breakdown. See the Langfuse review.

Which should you pick?

Choose Braintrust if

Nothing in the data separates Braintrust from Langfuse on the points above - pick on price and on how each one feels to use.

Braintrust review

Choose Langfuse if

Nothing in the data separates Langfuse from Braintrust on the points above - pick on price and on how each one feels to use.

Langfuse review

Questions people ask

Is Braintrust or Langfuse better?
Neither clearly leads. Braintrust starts at On request and Langfuse at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Braintrust or Langfuse?
Braintrust starts at On request and Langfuse at On request.
Does Braintrust or Langfuse run on more platforms?
Both run on Web, so platform support will not decide this one for you.
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Related pages

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