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Braintrust

braintrust.dev

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Spec score 9.2 #2 of 29 in LLM Evaluation Tools

What it is

Braintrust is an observability platform for teams running AI agents in production. It lets teams inspect agent traces and tool calls while tracking latency, cost, and quality in real time. Users can evaluate datasets, compare prompts and models, and score outputs with LLMs, code, or human reviewers. Discovery tools surface patterns in production traces to help investigate agent behavior, and the Loop agent can run evaluations, generate test cases, and iterate on prompts autonomously. Braintrust lists native SDKs for Python, TypeScript, Go, Ruby, C#, and more, and its MCP server lets coding agents query logs, run evaluations, and update prompts from an IDE. Security options listed include SSO, RBAC, and hybrid deployment; Braintrust states that it is SOC 2 Type II certified and GDPR and HIPAA compliant. Starter is free, with 1 GB processed data, 10,000 scores, and 14-day retention. Pro costs $249.00 per month; Enterprise pricing is custom.

Spec sheet

What it does
Braintrust is an observability and evaluation platform for instrumenting, understanding and improving AI agents in production.Read 15 Oct 2026 · braintrust.dev
Product
Braintrust describes itself as an active observability platform for AI agents that helps teams inspect production behavior and improve agent quality.Read 29 Sep 2026 · braintrust.dev
Intended users
Braintrust says its platform is for teams running agents in production, from early-stage shipping through enterprise scale.Read 29 Sep 2026 · braintrust.dev
Deployment
Braintrust offers SaaS, bring-your-own-cloud and self-hosted deployment models.Read 15 Oct 2026 · braintrust.dev
Integrations
Braintrust describes its product as framework agnostic and lists native SDKs for Python, TypeScript, Go, Ruby, C#, and more.Read 29 Sep 2026 · braintrust.dev
Security
Braintrust states that it is SOC 2 Type II certified and GDPR and HIPAA compliant, and offers SSO, RBAC, and hybrid deployment options.Read 29 Sep 2026 · braintrust.dev
Compliance
Braintrust states that it is SOC 2 Type II compliant and supports HIPAA safeguards and GDPR arrangements through DPAs and appropriate deployment choices.Read 15 Oct 2026 · braintrust.dev
Support
The pricing page lists community support, priority support, and shared Slack channel support across its plans.Read 29 Sep 2026 · braintrust.dev
Headquarters
LinkedIn lists San Francisco as Braintrust's headquarters.Read 15 Oct 2026 · linkedin.com
Founded
LinkedIn lists Braintrust's founding year as 2023.Read 15 Oct 2026 · linkedin.com
Access control
The platform provides RBAC with built-in and custom permission groups at organization, project and object levels.Read 15 Oct 2026 · braintrust.dev
API query support
The API supports SQL queries over logs, experiments and datasets through the btql endpoint.Read 15 Oct 2026 · braintrust.dev
API regions
The documented API endpoints include US, EU and custom self-hosted data-plane URLs.Read 15 Oct 2026 · braintrust.dev
Company size
LinkedIn lists Braintrust as a privately held software-development company with 51–200 employees.Read 15 Oct 2026 · linkedin.com
Crunchbase headcount
Crunchbase places Braintrust in the 101–250 employee range.Read 15 Oct 2026 · crunchbase.com
Data controls
The pricing page lists custom retention policies and S3 trace export as Enterprise features.Read 29 Sep 2026 · braintrust.dev
Discovery
Its discovery tools automatically surface recurring behavior, failure patterns and opportunities from production traces.Read 15 Oct 2026 · braintrust.dev
Documentation depth
The documentation is organized into guides, integrations, SDKs, API reference, cookbook, troubleshooting, changelog and administration sections.Read 15 Oct 2026 · braintrust.dev
Evaluations
Teams can run experiments against datasets and score outputs with language models, code or human reviewers.Read 15 Oct 2026 · braintrust.dev
Founder
Crunchbase identifies Ankur Goyal as Braintrust's founder and CEO.Read 15 Oct 2026 · crunchbase.com
Framework support
Braintrust describes itself as framework agnostic and says it works with existing application stacks without framework lock-in.Read 15 Oct 2026 · braintrust.dev
Funding news
Braintrust announced a $36 million Series A led by Andreessen Horowitz on October 8, 2024, bringing announced total funding to $45 million at that time.Read 15 Oct 2026 · braintrust-cgn0uy4su.preview.braintrust.dev
Independent deployment description
GetApp describes managed SaaS, hybrid BYOC and self-hosted configurations as available, with self-hosting listed for Enterprise.Read 15 Oct 2026 · getapp.com
Independent funding report
Forbes reported the 2024 Series A valued the San Francisco startup at about $150 million and included Databricks and Datadog among participants.Read 15 Oct 2026 · forbes.com
Independent review availability
GetApp displayed no user reviews and a 0.00/10 recommendation score for Braintrust when checked.Read 15 Oct 2026 · getapp.com
Limit: learning curve
G2 reviewers repeatedly report that advanced features, evaluation setup and test-case organization take time to learn.Read 15 Oct 2026 · g2.com
Limit: onboarding
Reviewers on G2 say more guided examples and clearer explanations would improve initial onboarding.Read 15 Oct 2026 · g2.com
Limit: usage limits
One G2 reviewer describes token or credit limits as restrictive because small changes can consume free allowance quickly.Read 15 Oct 2026 · g2.com
Loop agent
Loop is an embedded AI agent that can run evaluations, generate test cases and iterate on prompts from natural-language instructions.Read 15 Oct 2026 · braintrust.dev
MCP
Braintrust provides an MCP server that lets coding tools query logs, run evaluations and update prompts.Read 15 Oct 2026 · braintrust.dev
Observability
The platform captures agent traces, prompts, responses and tool calls, with search across logs plus latency, cost and quality tracking.Read 15 Oct 2026 · braintrust.dev
Pattern automations
Patterns identifies recurring issues and opportunities across production traces for investigation.Read 15 Oct 2026 · braintrust.dev
Plan limits
Starter includes one human review score per project, while Pro and Enterprise include unlimited human review scores.Read 29 Sep 2026 · braintrust.dev
Praise: regression testing
G2 reviewers say structured datasets, automated evaluations and experiment tracking help catch regressions before release.Read 15 Oct 2026 · g2.com
Praise: unified workflow
G2 reviewers praise having tracing, logging, evaluation and prompt comparison in one organized dashboard.Read 15 Oct 2026 · g2.com
Public API
The REST API manages projects, experiments, datasets, traces, prompts, tools, scorers, access controls and results; its OpenAPI specification is published on GitHub.Read 15 Oct 2026 · braintrust.dev
Rating on G2
4.3 out of 5 from 58 reviewsRead 15 Oct 2026 · g2.com
SDK languages
Official SDK documentation covers TypeScript, Python, Go, Java, Ruby and C#, with Rust tracing and evaluation support marked alpha.Read 15 Oct 2026 · braintrust.dev
SDK licence
Braintrust's public JavaScript tracing and evaluation SDK repository is licensed under Apache-2.0.Read 15 Oct 2026 · github.com
Security controls
The security documentation states that data is encrypted in transit and at rest, with provider secrets protected using AES-256.Read 15 Oct 2026 · braintrust.dev
Status
The public status page reported all systems fully operational on October 15, 2026.Read 15 Oct 2026 · status.braintrust.dev
Trace to dataset
Production traces can be converted into evaluation datasets to create regression tests from real failures and edge cases.Read 15 Oct 2026 · braintrust.dev
Tracing
The platform lets users inspect agent traces and tool calls and track latency, cost, and quality in real time.Read 29 Sep 2026 · braintrust.dev

Plans and prices

Starter Free billed monthly 1 GB processed data · 10,000 scores · 14-day retention · Unlimited users · Unlimited projects · Unlimited datasets Read 20 Sep 2026 · braintrust.dev
Starter Free $0 / month $10 model credits · 1 GB processed data · 10k scores · 14-day retention · unlimited users, projects, datasets, playgrounds and experiments Read 15 Oct 2026 · braintrust.dev
Pro $249 a month $249 / month $100 model credits · 5 GB processed data · 50k scores · 30-day retention · custom charts · environments · priority support · RBAC Read 15 Oct 2026 · braintrust.dev
Enterprise Priced on request Custom pricing Custom retention and export · RBAC · premium support · on-premises or hosted deployment Read 15 Oct 2026 · braintrust.dev

Every Braintrust plan and price →

Strong points and limits

Strong points

  • Tracks latency, cost, and quality in real time
  • Compares prompts and models against datasets
  • Loop agent can run evaluations autonomously
  • Native SDKs cover several programming languages
  • Offers SSO, RBAC, and hybrid deployment

Limits

  • Starter has 14-day retention
  • Starter allows one human review score per project
  • Pro costs $249.00 per month
  • Enterprise pricing is custom

Who it suits

Braintrust is aimed at teams operating AI agents in production, from early-stage teams to enterprises. It suits teams that need to inspect traces, evaluate outputs, and manage prompts.

Verdict

Braintrust combines production tracing with evaluation and prompt iteration. Its free Starter plan has defined data, score, and retention limits, while Pro starts at $249.00 per month.

Where Specifiction places it

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