vioscaleAI
Comparison

Langfuse vs LangSmith

On the evidence we track, Langfuse leads this comparison with a composite score of 66/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

Langfuse full profile →LangSmith full profile →
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★Langfuse66
LangSmith52
Score
vioscaleAI score
Langfuse66 / 100medium · 56%
LangSmith52 / 100low · 12%
Pricing
Free tier
Langfuse✓
LangSmith–
Model
Langfusefreemium
LangSmith–
Price level
Langfusefree
LangSmith–
Transparent
Langfuse✗
LangSmith–
Integrations
Count
Langfuse100
LangSmith–
Security
Gdpr
Langfuse✓
LangSmith–
Hipaa
Langfuse✓
LangSmith–
Iso27001
Langfuse✓
LangSmith–
Soc2
Langfuse✓
LangSmith–
Trust center
Vulnerabilities
Reliability
Status page
Langfuse✓
LangSmith✓
Adoption
Dependent repos
Langfuse0
LangSmith–
Github stars
Langfuse35,781
LangSmith–
Package downloads weekly
Langfuse6,493,381
LangSmith–
Activity
Commits last 30d
Langfuse100
LangSmith–
Release
History
Langfuse20 items
LangSmith–
License
Spdx
LangfuseMIT
LangSmith–
Language
Primary
LangfuseTypeScript
LangSmith–
Market
Availability
Content
Faq
Langfuse7 items
LangSmith4 items

Capabilities

Feature-by-feature on the axes that matter for mlops & llmops tools. “-” means undocumented, not absent.

Core
Tool role
LangfuseLLM observability / eval
LangSmithLLM observability / eval
Deployment
Self-hostable / OSS core
Langfuse✓
LangSmith✗
Managed cloud available
Langfuse✓
LangSmith✓
On-prem / VPC deployment
Langfuse✓
LangSmith✗
Observability
LLM tracing / observability
Langfuse✓
LangSmith✓
Evaluation (offline / LLM-judge / human)
Langfuse✓
LangSmith✓
Dev
Prompt management + versioning
Langfuse✓
LangSmith-
Tracking
Experiment tracking / model registry
Langfuse✓
LangSmith-
Serving
Model serving / inference endpoint
Langfuse✗
LangSmith✗
Interop
OpenTelemetry / OpenLLMetry compatible
Langfuse✓
LangSmith-
Framework-agnostic
Langfuse✓
LangSmith✓
Gateway
Multi-provider model support
Langfuse✓
LangSmith-
Data
No-train-on-customer-data guarantee
Langfuse-
LangSmith-

What each one is

The product in its own terms, so the numbers below have context.

Langfuse

Leader

A comprehensive observability and development platform that combines tracing, prompt management, evaluation, and experimentation, enabling teams to understand LLM behavior in production and ship improved applications with confidence

Independently observed

LangSmith

LangSmith enables users to observe, evaluate, and deploy AI agents through a web interface that requires no coding. The platform provides tools for agent engineering and monitoring.

Independently observed

Pricing

List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.

Langfuse

Leader
SubscriptionFree tier

Multiple tiers available; specific pricing not shown in provided text

  • HobbyFree
  • Core-
  • Enterprise-
as of verify ↗

LangSmith

Pricing not documented yet.

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Platforms
Web
Langfuse✓
LangSmith✓
Deployment
Cloud / SaaS
Langfuse✓
LangSmith✓
Self-hosted
Langfuse✓
LangSmith✗

Integrations

What each product connects to. Counts come from the vendor's own integration directory where one exists.

Langfuse

Leader
24 total
  • LangChain
  • Vercel AI SDK
  • LiteLLM
  • Pydantic AI
  • Google ADK
  • CrewAI
  • LiveKit
  • Haystack
  • LlamaIndex
  • OpenAI
  • Anthropic
  • Amazon Bedrock
  • Azure OpenAI
  • Mistral AI
  • Google Gemini
  • xAI
  • vLLM
  • Groq
  • OpenAI SDK
  • Cohere
  • Elasticsearch
  • OpenSearch
  • Hugging Face
  • OpenTelemetry
Independently observed

LangSmith

Not documented yet.

Still deciding?

Langfuse or LangSmith: which one depends on you

A composite score cannot know your constraints. Describe them and both get re-weighted against what you actually need, with the evidence behind every position.

Free to run, no account needed to start. How the evaluation works

Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.