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Braintrust

Evals and observability platform for reliable AI agents

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Collected: 2025/9/30

What is Braintrust? Complete Overview

Braintrust is the leading evals and observability platform designed to help teams build and deploy reliable AI agents. It provides comprehensive tools for testing, monitoring, and improving AI applications through systematic evaluations. The platform addresses key challenges in AI development, such as unpredictable agent failures, quality control, and performance monitoring. Braintrust is trusted by top enterprises and engineering teams to accelerate AI development cycles while ensuring high-quality outputs. Its intuitive framework combines datasets, tasks, and scorers to create a shared understanding for cross-functional teams. With features like real-time monitoring, automated scoring, and AI-assisted workflows, Braintrust enables organizations to ship better AI features faster and with confidence.

Braintrust Interface & Screenshots

Braintrust Braintrust Interface & Screenshots

Braintrust Official screenshot of the tool interface

What Can Braintrust Do? Key Features

End-to-End AI Development

Braintrust provides a complete workflow for AI development, from initial prompt engineering to production monitoring. Its integrated platform allows teams to iterate on prompts, run comprehensive evaluations, and deploy with confidence. The system supports both automated and human scoring to capture nuanced performance metrics.

Production Monitoring

Track live model responses with real-time monitoring that alerts teams when quality drops or incorrect outputs increase. The platform provides visibility into latency, cost, and custom quality metrics as traffic flows through your application.

Side-by-Side Comparisons

Compare different prompt versions and models through intuitive diffs that show exactly why one performs better than another. This feature eliminates guesswork in AI improvement by providing data-driven insights into performance changes.

Brainstore

A specialized database designed specifically for AI application logs and traces. Brainstore offers 80x faster query performance compared to traditional databases, enabling teams to search, filter, and analyze AI interactions at enterprise scale.

Loop AI Agent

Braintrust's built-in AI agent automates time-intensive parts of AI development. Loop can optimize prompts, generate synthetic evaluation datasets, and build custom scorers tailored to your specific quality metrics.

Enterprise Security

Braintrust meets rigorous security requirements with SOC 2 Type II certification, granular role-based access control, and hybrid deployment options. The platform is designed for large organizations with strict compliance needs.

Best Braintrust Use Cases & Applications

Quality Assurance for AI Features

Product teams use Braintrust to systematically test new AI features before release. By running evaluations against real data, they can catch quality issues early and prevent embarrassing failures in production.

Prompt Engineering Optimization

AI developers leverage Braintrust's playground and comparison tools to rapidly iterate on prompts. The platform's quantitative scoring helps identify the most effective prompt variations for specific use cases.

Production Incident Detection

Engineering teams configure Braintrust's monitoring to alert when model quality drops or unsafe outputs increase. This early warning system helps maintain reliability as AI applications scale.

Cross-Team Collaboration

Organizations use Braintrust as a shared platform where engineers, product managers, and domain experts can collaboratively review AI performance and debug issues in real-time.

How to Use Braintrust: Step-by-Step Guide

1

Sign up for a free account and set up your project workspace. The intuitive interface guides you through connecting your AI models and configuring basic evaluation parameters.

2

Use the playground to refine your prompts and evaluation ideas. You can quickly test different prompt variations, swap models, and edit scorers directly in the browser.

3

Create comprehensive evaluations by defining your dataset, task, and scorers. Run batch tests against hundreds or thousands of examples to understand performance across different scenarios.

4

Analyze evaluation results using side-by-side comparisons. Review automated scores and layer human feedback where needed to capture nuanced aspects of performance.

5

Set up production monitoring to track your AI application in real-time. Configure alerts for quality thresholds and safety rails to prevent regressions from reaching users.

6

Use Brainstore to query and analyze production logs at scale. The specialized database enables fast searches across all your AI interactions for continuous improvement.

Braintrust Pros and Cons: Honest Review

Pros

Comprehensive evaluation framework that combines automated and human scoring
Exceptional performance with Brainstore's specialized AI database (80x faster queries)
Intuitive interface that supports both technical and non-technical team members
Powerful automation through the Loop AI agent that accelerates development
Enterprise-grade security with SOC 2 Type II certification and RBAC
Proven results with customers reporting 5x more AI features in production

Considerations

Steeper learning curve for teams new to systematic AI evaluation
Pro plan's included data allowances may be limiting for high-volume applications
Limited self-service options for Enterprise features that require custom contracts

Is Braintrust Worth It? FAQ & Reviews

The Free plan is ideal for individuals and small teams getting started with AI evaluations. Pro suits growing teams with more extensive testing needs. Enterprise is designed for large organizations with high-volume requirements or strict compliance needs.

Processed data refers to the volume of input/output pairs and logs that Braintrust handles for your evaluations and monitoring. This includes the text, metadata, and analysis results from your AI interactions.

Scores are quantitative measurements of your AI's performance on specific tasks. Braintrust allows you to define custom scoring metrics that matter for your application, such as accuracy, relevance, or safety.

Braintrust specializes in AI evaluation, observability, and prompt engineering capabilities, positioning it across AI Development Tools and Machine Learning Operations categories. This combination makes it particularly effective for users seeking comprehensive ai development tools solutions.

Braintrust is designed for users working in ai development tools with additional applications in machine learning operations and quality assurance. It's particularly valuable for professionals and teams who need reliable AI evaluation and observability capabilities.

Trace spans represent individual units of work in your AI application's execution. Each API call, model invocation, or processing step generates trace spans that help you understand performance and debug issues.

Pro plan includes base allowances with pay-as-you-go pricing for additional usage. Enterprise offers custom pricing based on your specific requirements. All plans are billed monthly, with annual options available for Enterprise customers.

How Much Does Braintrust Cost? Pricing & Plans

Free

$0/month
1 million trace spans
1 GB processed data
10,000 scores and custom metrics
14 days data retention
Unlimited users

Pro

$249/month
Unlimited trace spans
5 GB processed data ($3/GB thereafter)
50,000 scores and custom metrics ($1.50/1,000 thereafter)
1 month data retention ($3/GB retained thereafter)
Unlimited users

Enterprise

Custom
Premium support
On-prem or hosted deployment options
High volume capacity
Privacy-sensitive data handling
Custom security requirements

Braintrust Support & Contact Information

Last Updated: 9/30/2025
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