Builder infrastructure
Braintrust
The active observability platform for agents.
Braintrust positions itself as an agent-observability platform for tracing, evaluation, and turning production patterns into improvements.
Vendor's own claim
What Braintrust is
Vendor's own claimA developer-facing system for instrumenting AI applications, observing their production behavior, curating evaluation data, and measuring changes.
What it can do
Vendor's own claim- Agent trace inspection
- Evals with datasets and scorers
- Production pattern discovery
- Online scoring and quality gates
- Annotation and custom trace views
- Prompt and model comparison
Who it is for
Our readTeams building AI agents that need repeatable evaluation and production observability rather than ad-hoc prompt testing.
When to choose something else
Our readThis is not a lightweight scheduling or outbound tool: its value appears only once a team can instrument an AI application and define what quality means. Teams that cannot send production traces or maintain datasets/scorers will pay for observability surface they cannot use; the Starter plan also retains data for 14 days.
Implementation considerations
Our readSetup assessment: 2h
Getting value requires an account, trace instrumentation, and an initial evaluation or quality rubric; that is more than a simple SaaS connection.
Prerequisites
- An AI application or agent to instrument
- A defined quality criterion or evaluator
- Braintrust account
Published pricing
From official docs| Plan | Price | Included |
|---|---|---|
| Starter | $0/month | $10 model credits, 1 GB processed data, 10k scores, 14-day retention |
| Pro | $249/month | $249 model credits, 5 GB processed data, 50k scores, 30-day retention |
| Enterprise | Custom pricing | See official pricing |