Braintrust
Evaluation & observability · Freemium
About
An evaluation and observability platform for scoring prompts and models against datasets and monitoring production.
Key features
- Experiments with scorers
- Prompt playground
- Logging and tracing
- Datasets
Best for
- — Systematic evals before shipping
- — Comparing prompt versions with scores
- Pricing
- Freemium
- Platforms
- Web, API
- Works with
- OpenAI, Anthropic, Vercel
- Last checked
- 2026-10-29
- Status
- Listed, not yet tested
Our take
Fast, well-designed eval loop. Getting value means investing in good datasets and scorers.
Features and pricing change often — confirm on braintrust.dev before you commit.
Alternatives to Braintrust
| Tool | Type | Pricing | Best for |
|---|---|---|---|
| Braintrust (this) | Evaluation & observability | Freemium | Systematic evals before shipping |
| Langfuse | Evaluation & observability | Open source | Tracing LLM apps in production |
| LangSmith | Evaluation & observability | Freemium | LangChain and LangGraph users |
| Arize Phoenix | Evaluation & observability | Open source | Local debugging of LLM traces |
| W&B Weave | Evaluation & observability | Freemium | Teams already on Weights & Biases |
| Helicone | Evaluation & observability | Freemium | Quick cost and usage visibility |
| promptfoo | Evaluation & observability | Open source | Prompt regression tests in CI |