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Braintrust vs Arize Phoenix
Side-by-side comparison of features, pricing, and ratings
Pricing
Freemium
Freemium
Plans
$0/month
$249/month
Custom pricing
Free
Contact for pricing
Popularity
2.7k views
7.3k views
Skill Level
Intermediate
Intermediate
API Available
Platforms
WebAPICLI
WebAPICLI
Categories
💻 Code & Development📊 Data & Analytics🤖 Automation & Agents
💻 Code & Development📊 Data & Analytics
Features
Real-time trace inspection of prompts and responses
Automated pattern discovery with Topics
Evaluation scoring via LLMs, code, or humans
Online scoring and quality gates for releases
Custom facets for trace clustering
Trace-to-dataset conversion for evals
Loop Agent for automatic prompt/scorer optimization
Brainstore custom database for fast trace querying
Native SDKs for Python, TypeScript, Go, Ruby, C#
Custom annotation interfaces per workflow
Scalable trace ingestion for production
Live performance monitoring of latency and cost
Versioned datasets for experiment reproducibility
SSO/SAML and RBAC support
HIPAA and GDPR compliance
Agent tracing with prompts, retrievals, tool calls, outputs
LLM-as-judge evaluation and human annotation
Dataset creation from traces for experiments
Prompt IDE for iterative prompt optimization
Hypothesis testing with benchmarked experiments
Cost, latency, and performance scoring
Self-hosted deployment (local, Docker, Kubernetes)
Cloud-based free instances with no infrastructure setup
OpenTelemetry native support
Vendor-agnostic: works with any model/framework/language
Open-source (ELv2) with community contributions
9k+ GitHub stars and 2.5M+ monthly downloads
Integrations
LlamaIndex
OpenTelemetry