
AI observability platform for building quality AI products
By Tanmay Verma, Founder · Last verified 07 Jun 2026
In short
Braintrust — AI observability platform for building quality AI products. Best for Engineering teams monitoring production AI at scale, Product managers validating AI quality and regression, Teams needing automated eval-driven quality gates. Free to start; paid plans from $249/mo.
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Braintrust delivers end-to-end AI observability with automatic pattern discovery and eval-driven quality gates. Built for teams serious about production AI, it combines real-time tracing with automated improvement loops. A must-try for engineering teams that need to monitor, evaluate, and iteratively improve AI at scale.
Compare with: Braintrust vs Dash0, Braintrust vs OpenAgents, Braintrust vs Arize Phoenix
Last verified: June 2026
Braintrust stands out as a dedicated AI observability platform that goes beyond simple logging. For teams running AI in production, it offers real-time trace inspection, automated pattern discovery via Topics, and a robust evaluation framework that lets you define quality with code, LLMs, or human scorers. The Loop Agent is a standout feature, automatically generating improvements based on your objectives. The platform is framework-agnostic and integrates smoothly with any stack using native SDKs for Python, TypeScript, Go, and more. When to pick this: You need deep observability for production AI, want to catch regressions before they affect users, and value automatic pattern detection over manual analysis. It's ideal for teams that already have a CI/CD pipeline and want to add quality gates. When to pass: You only need basic logging or are building a simple chatbot. Braintrust may be overkill for experimentation stages. Compared to alternatives like LangSmith or Weights & Biases, Braintrust's Topics feature for automatic pattern discovery and its purpose-built Brainstore database give it an edge in production search and scalability. However, its pricing may be higher for smaller teams. A real-world caveat: while Brainstore promises fast queries, the free tier might limit trace volume for heavy users. Overall, a strong choice if observability and quality are critical for your AI product.
Skip Braintrust if Skip Braintrust if you need a free no-code AI app builder or a lightweight logging-only tool without evaluation capabilities.
Across the latest 10 updates: 7 feature updates, 1 community discussion and 2 news mentions.
Engineering post on architecture enabling real-time trace analysis at scale.
Azure AI Foundry and OpenAI can connect via Microsoft Entra Workload Identity.
Remote evals and sandboxes can now run directly as immutable experiments.
Org owners can create service tokens via API for automation.
Multiple reviewers can score same span independently; scores averaged automatically.
Classifiers return categorical labels instead of numeric scores for sorting and filtering.
Rewind scoring automations to re-process traces from a past timestamp.
Topics feature GA — automatically surfaces patterns in production traces.
Product blog framing observability as proactive monitoring, not passive logging.
Community discussion on challenges deploying agentic apps to production.
How likely is Braintrust to still be operational in 12 months? Based on 6 signals including funding, development activity, and platform risk.
Braintrust is a comprehensive AI observability platform designed to help teams build and maintain quality AI products in production. It provides deep visibility into AI behavior, enabling engineers and product managers to trace, evaluate, and improve AI systems continuously. The platform is trusted by leading AI teams at companies like Coursera, Notion, and Graphite. Key features include real-time trace inspection for prompts, responses, and tool calls; evaluation (evals) frameworks to define quality metrics using LLMs, code, or human scorers; and automated pattern discovery through Topics that surfaces issues, sentiments, and trends automatically. Braintrust also offers Loop Agent, an AI-driven optimization tool that generates better prompts, scorers, and datasets based on user goals. Custom facets allow teams to define dimensions like use case or customer segment for tailored clustering. Braintrust integrates with any AI stack via native SDKs for Python, TypeScript, Go, Ruby, C#, and more, and includes Brainstore, a purpose-built database for fast querying of complex AI traces. The platform is SOC 2 Type II certified, GDPR compliant, and supports SSO, RBAC, HIPAA, and hybrid deployment. Compared to alternatives, Braintrust focuses on production-grade performance with automatic pattern detection and seamless integration, making it a strong choice for teams scaling AI in production.
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Concrete scenarios for the personas Braintrust actually fits — and what changes day-one when you adopt it.
Shipping a new prompt to production but unsure of quality.
Outcome: Inspect production traces, convert a problematic trace into an eval dataset, run automated evals in CI, catch regressions, and deploy with confidence.
Needs to evaluate whether a new model version improves user experience.
Outcome: Run side-by-side experiments in the playground, review scores from LLM-as-a-judge and human annotators, and block rollout if quality drops.
The free tier offers limited processed data (1 GB) and scores (10k), with only 14-day retention. High-volume usage can become costly at $4/GB and $2.50/1k scores. Human review scores are limited to 1 per project on the Starter plan. Custom topics, charts, and environments require the Pro plan. API key/service token creation is restricted to the UI as of May 2026.
Project the real annual outlay, including the implied monthly cost when only an annual tier is published.
Vendor list price only. Add-on usage, seat overages, and contract minimums are surfaced under Hidden costs & gotchas.
For each published Braintrust tier: who it actually fits, and what it adds vs. the previous tier. Cross-reference the cost calculator above for projected annual outlay.
Starter
$0/month
Ideal for
Individual developers or small teams exploring AI observability with low volume (under 1 GB data/month).
What this tier adds
Free entry point with 1 GB data, 10k scores, and 14-day retention; no custom topics, charts, or SAML SSO.
Pro
$249/month
Ideal for
Growing teams needing more data capacity, custom dashboards, and priority support.
What this tier adds
$249/month includes 5 GB data, 50k scores, 30-day retention, custom topics, charts, environments, and SAML SSO.
Enterprise
Custom pricing
Ideal for
Large organizations with high volume, compliance needs (HIPAA), and custom retention requirements.
What this tier adds
The company stage and team size where Braintrust's pricing actually pencils out — and where peers do it cheaper.
Braintrust's Starter plan ($0) works for small experiments, but production use on Pro ($249/mo) includes 5 GB data and 50k scores. Overage at $3/GB and $1.50/1k is competitive versus similar platforms like LangSmith, though teams with very high volumes should negotiate Enterprise pricing.
How long it actually takes to get something useful out of Braintrust — broken out by persona, not the marketing-page minute.
AI engineers can log their first trace within minutes using the Python or TypeScript SDK. Setting up automated evals in CI takes a few hours. Custom annotation interfaces and hybrid deployments may take days to configure.
How to bring data in from common predecessors and how to get it back out — written for the switcher, not the buyer.
Pricing, brand, ownership, or deprecation changes worth knowing before you commit. Most-recent first.
Common stack mates teams adopt alongside Braintrust, with the specific reason each pairing earns its keep.
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Last calculated: June 2026
Custom pricing with full RBAC, S3 data export, uptime SLA, dedicated support, and hybrid deployment options.
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