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Langfuse vs Comet
Side-by-side comparison of features, pricing, and ratings
Open-source LLM observability platform — traces, evals, prompts, and datasets for production agents.
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Freemium
Freemium
Plans
Free (MIT)
Free
$59/mo
$499/mo
$0
$179/mo
Custom
Rating
—
—
Popularity
6.4k views
6.0k views
Skill Level
Intermediate
Advanced
API Available
Platforms
WebAPI
WebAPICLI
Categories
💻 Code & Development📊 Data & Analytics
📊 Data & Analytics
Features
Hierarchical LLM call tracing
Session and user views
Prompt management with versioning and one-click deployments
LLM-as-judge evaluations (boolean, categorical, free-form text)
User feedback capture
Dataset management with versioning and JSON schema enforcement
Cost and latency dashboards with automated alerts
Experiments (first-class feature with CI/CD integration)
Human annotation workflows with annotation queues
Playground for testing prompts on real production data
OpenTelemetry-based instrumentation (Python, JS/TS, Go, Java, .NET)
Self-hosting via Docker Compose, Kubernetes, AWS, GCP, Azure
80+ integrations with model providers, frameworks, and tools
SOC2, ISO27001, HIPAA compliance on paid tiers
MCP server and CLI for coding agent integration
LLM trace logging and visualization
Test suites with LLM-as-a-judge evaluation
Automated code fix agent (Ollie)
Agent sandbox playground
Version control for agent deployments
Production monitoring and governance
Open-source core
Self-hosted or cloud deployment
Python decorator integration
LlamaIndex integration
LangChain integration
OpenAI integration
Custom dashboards
OpenClaw observability
Integrations
OpenAI
Anthropic
Google Gemini
Amazon Bedrock
Mistral AI
xAI Grok
vLLM
LangChain
LlamaIndex
Vercel AI SDK
LiteLLM
LangGraph
OpenAI Agents SDK
CrewAI
AutoGen
Pydantic AI
Dify
n8n
Zapier
PostHog
Mixpanel
Coval
Helicone
OpenRouter
Claude Code
Hugging Face
Python