Braintrust vs Weights & Biases
A side-by-side look at pricing, capabilities, pros, cons, and our editorial scores.
Braintrust Evaluation | Weights & Biases Evaluation | |
|---|---|---|
| Tagline | Eval, monitor, and improve AI products end-to-end. | The ML experiment tracker, now with LLM eval features. |
| Category | Evaluation | Evaluation |
| Pricing | Freemium· Free up to 1k events/day; team from $249/mo | Freemium· Free personal; team from $50/mo |
| Model | — | — |
| Editorial score | 8.9 / 10 | 8.4 / 10 |
| Use cases | evalsmonitoringprompt management | ML experimentsLLM evalWeave |
| Pros |
|
|
| Cons |
|
|
| Website | www.braintrust.dev | wandb.ai |
Pick Braintrust if
- ✅ Full eval + observability in one tool
- ✅ Excellent UX
- ✅ Strong dataset/experiment tracking
Pick Weights & Biases if
- ✅ Industry-standard for ML tracking
- ✅ Weave adds LLM-native eval
- ✅ Mature, reliable