Braintrust vs Vellum
A side-by-side comparison of Braintrust and Vellum, two Eval tools, drawn from Ignaite's continuously-verified listings.
Compared from listings verified as of
At a glance
The honest brief
Braintrust
Eval-first: prompts are versioned objects and CI scorers block a merge when quality regresses.
- Eval workflow as the primary interface
- CI scorers block merges on regression
- Dataset versioning + OTel tracing
- Generous free tier
- Closed-source SaaS
- Self-hosting needs Enterprise contract
- Overkill for tiny single-file eval needs
Vellum
Passes model token costs straight through at cost, so the platform fee is unbundled from usage — unlike marked-up LLMOps tools.
- Visual builder plus Python SDK
- Prompt, RAG, eval, monitoring in one
- Eval and test suites before/after deploy
- Non-technical collaborators supported
- Free tier available
- Cloud-only platform
- Breadth over best-in-class depth
- Seat costs at Pro/Enterprise
- Lock-in to its workflow model