Braintrust vs Confident AI (DeepEval)
Both are eval frameworks tools. Here is how they actually differ on price, billing model and deployment.
Braintrust
The most complete eval-first platform - evals, experiments, CI/CD quality gates and observability in one system. The catch is a processed-data-GB billing meter that's uncapped and punishes verbose agents.
Confident AI (DeepEval)
The pytest for LLM apps - write test cases, run "deepeval test run" in CI. The OSS framework is Apache-2.0 and free; the Confident AI cloud has a steep pricing cliff from $200/mo to $2,000/mo.
| Braintrust | Confident AI (DeepEval) | |
|---|---|---|
| Category | Eval Frameworks | Eval Frameworks |
| Our rating | 4/5 | 4/5 |
| Starting price | $249/mo | $200/mo |
| Billing meter | span | No usage metering |
| Free plan | Yes | Yes |
| Free self-hosting | No or paid tier only | Yes, free |
| Best for | Teams that want turnkey regression testing and CI/CD quality gates without assembling the eval orchestration themselves | Python teams who want pytest-style LLM evals in CI/CD and can either live in the OSS framework or absorb the cloud's pricing steps |
Our verdict on Braintrust
The best turnkey eval platform of the four - if regression testing and blocking bad merges is your priority, nothing else is this complete out of the box. The gotcha is the billing model - processed data is metered by the byte with no spending cap, so the verbose agents and large RAG contexts that most need observability are exactly what blows up the bill. Watch the meter, or the $249 plan won't stay $249.
Full Braintrust review →Our verdict on Confident AI (DeepEval)
If your team writes Python and thinks in tests, DeepEval is the most natural eval framework there is - it really does feel like pytest for LLM apps, and the OSS core is free under Apache-2.0. The friction is the cloud. The Free tier is stingy at 5 test runs a week, and the jump from $200/mo Starter to $2,000/mo Team is a real 10x cliff. Watch the API bills too - almost every metric is LLM-as-judge.
Full Confident AI (DeepEval) review →Frequently Asked Questions
What is the main difference between Braintrust and Confident AI (DeepEval)?
Braintrust: Teams that want turnkey regression testing and CI/CD quality gates without assembling the eval orchestration themselves Confident AI (DeepEval): Python teams who want pytest-style LLM evals in CI/CD and can either live in the OSS framework or absorb the cloud's pricing steps Both sit in Eval Frameworks, so the decision usually comes down to billing model and deployment rather than raw capability.
Which is cheaper, Braintrust or Confident AI (DeepEval)?
It depends entirely on your workload shape, because they meter differently - Braintrust bills on span and Confident AI (DeepEval) bills on no usage metering. Published starting prices are $249/mo and $200/mo respectively, but those numbers are not comparable until you apply them to the same traffic. Use our cost calculator to model both against your own request volume and span count.
Can I self-host Braintrust or Confident AI (DeepEval)?
Braintrust: No or paid tier only. Confident AI (DeepEval): Yes, free. Free self-hosting means no licence fee, not no cost - you still own the infrastructure, upgrades and on-call.