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Braintrust

Platform for agent observability and evals: trace agents, score outputs and find patterns in production

Observability tool by Braintrust

IndexedApache-2.0★ 29
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npm install braintrust

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About

Braintrust traces agent runs, including prompts, responses and tool calls, with searchable logs and latency, cost and quality tracking. Its evals score outputs with LLMs, code or humans and run experiments against versioned datasets. A discovery feature surfaces recurring problems in production traces and suggests fixes.

Use cases: llm-evaluation, monitoring-observability

Reviews

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Fact sheet

Category
Evals
Self-host
Yesbraintrust.dev
Open source
Yesgithub.com
Compliance (vendor says)
SOC 2, HIPAAbraintrust.dev
SLA
Uptime SLA listed as a contractual feature (percentage not stated)braintrust.dev
Works with
langchain, openai-agents-sdkraw.githubusercontent.com
Protocols
opentelemetry, mcpraw.githubusercontent.com

Plans

Starter$0$10 model credits; 1 GB processed data then $4/GB; 10k scores then $2.50 per 1k; 14-day retention; unlimited users
Pro$249/month$100 model credits; 5 GB processed data then $3/GB; 50k scores; 30-day retention; custom charts, priority support, RBAC
EnterpriseContact salescustom pricing; custom data retention and export; RBAC; premium support; on-prem or hosted deployment

From the vendor's pricing page, read Oct 24, 2026.

Facts read from the vendor's own pages by claude-haiku-5-5 on Oct 24, 2026; a fact is shown only with the page it came from.

Signals

Stars
29
Forks
21
Open issues
52
Last commit
Oct 23, 2026 (5 days ago)
Last release
Oct 21, 2026 (7 days ago)

Details

Packages
npm braintrustpypi braintrust
License
Apache-2.0
Repository
github.com/braintrustdata/braintrust-sdk-javascript
Website
www.braintrust.dev
Docs
www.braintrust.dev/docs
First seen
Oct 24, 2026
Last checked
Oct 24, 2026
Source
WebsiteDocsPricing pageREADME
Cite this page

Braintrust. Agent Mart. https://agentmart.dev/observability/braintrust (last updated 2026-10-24)