No. 8 of 32 ·AI Agent Observability Tools

Braintrust

Web · Self-hosted · API · paid plans from $249/mo

Freedom report

Two barsScore 6.4

Free tierA free tier is on its own pricing page
Open codeNo open-source code on record
Runs widely1 of 6 device platforms
DocumentedPlans, terms and facts published

Braintrust is ranked #8 of 32 in AI agent observability tools on Freedom251. It runs on API, Self-hosted, Web. There is a free plan. Paid plans start at $249/mo.

Braintrust plans and pricing

All plans

Starter Free billed monthly 1 GB processed data · 10,000 scores · 14-day retention · Unlimited users · Unlimited projects · Unlimited datasets braintrust.dev · 20 Sept 2026

Pro $249/mo $100 credits + tok rates · 5 GB processed data, then +$3/GB · 50k scores, then $1.50/1k · 30-day retention, then $0.50/GB/mo · custom charts, environments, priority support, RBAC braintrust.dev · 29 Sept 2026

Starter Not published $10 credits + tok rates · 1 GB processed data, then +$4/GB · 10k scores, then $2.50/1k · 14-day retention · unlimited users, projects, datasets, playgrounds, experiments braintrust.dev · 29 Sept 2026

Enterprise Not published Custom pricing · custom retention and export · RBAC · premium support · on-prem or hosted deployment braintrust.dev · 29 Sept 2026

Compared on AI agent observability tools

Free plan: Yes
Paid from: $249/mo

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The record

Product: Braintrust describes itself as an active observability platform for AI agents that helps teams inspect production behavior and improve agent quality.
Tracing: The platform lets users inspect agent traces and tool calls and track latency, cost, and quality in real time.
Evaluations: Users can run experiments against datasets, compare prompts and models, and score outputs with LLMs, code, or humans.
Discovery: Braintrust says its discovery tools identify patterns in production traces and help teams investigate agent behavior.
Loop agent: The Loop agent can run evaluations, generate test cases, and iterate on prompts autonomously.
Integrations: Braintrust describes its product as framework agnostic and lists native SDKs for Python, TypeScript, Go, Ruby, C#, and more.
MCP: Braintrust's MCP server connects coding agents to its AI stack so users can query logs, run evals, and update prompts from an IDE.
Security: Braintrust states that it is SOC 2 Type II certified and GDPR and HIPAA compliant, and offers SSO, RBAC, and hybrid deployment options.
Data controls: The pricing page lists custom retention policies and S3 trace export as Enterprise features.
Support: The pricing page lists community support, priority support, and shared Slack channel support across its plans.
Plan limits: Starter includes one human review score per project, while Pro and Enterprise include unlimited human review scores.
Intended users: Braintrust says its platform is for teams running agents in production, from early-stage shipping through enterprise scale.
Price from: $249/mo

Where it ranks on Freedom251

Best AI Agent Observability Tools in 2026#8 of 32
Best AI LLM Evaluation Tools in 2026#9 of 30
Best LLM Evaluation Tools in 2026#4 of 29
Best AI Agent Evaluation Tools in 2026#10 of 29
Best LLM Observability Tools in 2026#8 of 26
Best Prompt Management Software in 2026#13 of 26
Best AI Prompt Management Software in 2026#5 of 25
Best Model Monitoring Software in 2026#9 of 24
Best AI LLM Observability Tools in 2026#6 of 23

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Sources

braintrust.dev· checked 29 Sept 2026
braintrust.dev/pricing· checked 29 Sept 2026