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vsFaultmap vs Braintrust
Braintrust compares versions you built. Faultmap finds the failure modes before version one exists.
Side by side
Faultmapbefore the buildBraintrustafter the build
When it runs
Before the build, in the design phase
After the build, on prompts and outputs
What it needs
Your goal, personas, data, and tools
Prompts, outputs, and eval datasets
What it produces
A map of where it breaks, plus the first test suite
Eval comparisons across versions
The question it answers
Where will this agent break, before I build it?
Which version of my built agent is better?
We do not replace Braintrust. Faultmap runs one step earlier. Keep using Braintrust after the build.
What Braintrust is
Braintrust in one sentence. Where Faultmap fits with it.
A workflow for writing, running, and comparing evals on your agent.
Eval workflowWhere Faultmap fits before it
- Run Faultmap in design to catch the breaks before you build.
- Build the agent against the test suite Faultmap hands you.
- Use Braintrust after launch for eval workflow.
Map the breaks before Braintrust sees them.
Run a free Faultmap on your goal and your data. No card, no code.