End-to-end AI development

Iterate, eval, ship

Braintrust is the evals and observability platform for building reliable AI agents

Trusted by the best
Iterate Preview 1Iterate Preview 2Iterate Preview 3
Eval Preview 1Eval Preview 2Eval Preview 3
Ship Preview 1Ship Preview 2Ship Preview 3
Why run evals?

Agents fail in unpredictable ways

How do you know your AI feature works?

Evals test your AI with real data and score the results. You can determine whether changes improve or hurt performance.

Are bad responses reaching users?

Production monitoring tracks live model responses and alerts you when quality drops or incorrect outputs increase.

Can your team improve quality without guesswork?

Side-by-side diffs allow you to compare the scores of different prompts and models, and see exactly why one version performs better than another.

Intuitive mental model

All evals are composed of a dataset, task, and scorers. This framework gives teams a shared understanding for testing and improving AI applications systematically.

Cross-functional collaboration

Engineers write code-based tests. Product managers prototype in the UI. Everyone can review results and debug issues together in real time.

Built for scale

Reliable, fast infrastructure handles high-volume production traffic and complex testing workflows.

“I've never seen a workflow transformation like the one that incorporates evals into ‘mainstream engineering’ processes before. It's astonishing.”
Malte Ubl, CTO at Vercel
Iterate
Refine prompt and eval ideas fast with playgrounds

Fast prompt engineering

Tune prompts, swap models, edit scorers, and run evaluations directly in the browser. Compare traces side-by-side to see exactly what changed.

Batch testing

Run your prompts against hundreds or thousands of real or synthetic examples to understand performance across scenarios.

AI-assisted workflows

Automate writing and optimizing prompts, scorers, and datasets with Loop, our built-in agent.

Eval
Run comprehensive tests on every prompt change to measure accuracy, consistency, and safety

Quantifiable progress

Measure changes against your own benchmarks to make data-driven decisions.

Quality and safety gates

Prevent quality regressions and unsafe outputs from reaching users.

Automated and human scoring

Run automated tests on every change, then layer human feedback to capture the nuance machines miss.

Ship
Track production AI applications with real-time monitoring and online scoring

Live performance monitoring

Track latency, cost, and custom quality metrics as real traffic flows through your application.

Automations and alerts

Configure alerts that trigger when quality thresholds are crossed or safety rails trip.

Scalable log ingestion

Ingest and store all application logs with Brainstore, purpose-built for searching and analyzing AI interactions at enterprise scale.

AI-powered workflows

Loop

Loop is an agent that builds your evals and automates the most time-intensive parts of AI development so you can focus on building compelling AI applications.

Prompt optimization

Loop analyzes your prompts and generates better-performing versions so you can hit your quality targets faster.

Loop prompt optimization

Synthetic data generation

Loop creates evaluation datasets tailored to your use case with the volume and variety needed for thorough testing.

Loop synthetic data generation

Scorer building

Loop builds and refines scorers to measure the specific quality metrics that matter for your application.

Loop scorer building
Unprecedented scale

Brainstore is built for AI data

Traditional databases can't handle the complexity of modern AI workflows. Brainstore is designed specifically for AI application logs and traces. Query, filter, analyze, and review logs 80x faster with Brainstore.
View benchmarks
“Brainstore has completely changed how our team interacts with logs. We've been able to discover insights by running searches in seconds that would previously take hours.”
Sarah Sachs, Engineering Lead at Notion

86.6x faster full text search
Brainstore
240 ms
Competition
20,789 ms

2.4x faster write latency
Brainstore
1,780 ms
Competition
4,176 ms

2.1x faster span load time
Brainstore
549 ms
Competition
1,160 ms

Built for enterprise

Security and compliance at scale

Braintrust meets the demanding security, performance, and collaboration requirements of large organizations building AI applications at scale

Granular permissions

Role-based access control with org-level permissions and project isolation to meet your security and compliance requirements.

SOC 2 Type II

Third-party security certification with comprehensive security controls.

Hybrid deployment

Self-hosting options to maintain full control over your AI data and meet strict compliance requirements.

Driving results

Outsized impact for the biggest brands in AI

5x
More AI features in production
20x
Increase in team productivity
24h
Max time to switch models
3x
Faster eval time
“Every new AI project starts with evals in Braintrust—it's a game changer.”
Lee Weisberger, Engineering Manager at Airtable

Bring structure to your AI agent development