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LabelStudio vs Arize Phoenix
Side-by-side comparison of features, pricing, and ratings
Pricing
Freemium
Freemium
Plans
$0
Custom
Free
Contact for pricing
Popularity
5.3k views
7.3k views
Skill Level
Intermediate
Intermediate
API Available
Platforms
WebAPICLI
WebAPICLI
Categories
📊 Data & Analytics🔬 Research & Education
💻 Code & Development📊 Data & Analytics
Features
Data labeling for image, text, audio, video, time series
Object detection with bounding boxes, polygons, keypoints
Named entity recognition (NER)
Audio transcription and speaker diarization
Time series classification and segmentation
Multi-modal labeling (image+text, audio+transcript)
LLM evaluation with custom rubrics and side-by-side comparison
Agentic trace evaluation and human-in-the-loop review
AI-assisted labeling with model pre-labeling
Programmable interfaces via API, Python SDK, webhooks
Customizable labeling templates and layouts
Data sync from any storage (S3, GCS, Azure)
Active learning workflow triggers
Self-hosted (Docker, pip, brew, git)
Community edition with 1M+ practitioners
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