Software · head to head
Langfuse vs Braintrust
Braintrust
Software
The active observability platform for agents
- From
- On request
- Rated
- -
The short version
- Each has a real cost: 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.; 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.
Where they differ
Only the attributes on which Langfuse and Braintrust actually diverge.
| Attribute | Langfuse | Braintrust |
|---|
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.
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.
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.
Pricing, plan by plan
Langfuse
On requestNo published plan breakdown. See the Langfuse review.
Braintrust
On requestNo published plan breakdown. See the Braintrust review.
Which should you pick?
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.
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.
Questions people ask
- Is Langfuse or Braintrust better?
- Neither clearly leads. Langfuse starts at On request and Braintrust at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Langfuse or Braintrust?
- Langfuse starts at On request and Braintrust at On request.
- Does Langfuse or Braintrust run on more platforms?
- Both run on Web, so platform support will not decide this one for you.