vioscaleAI
Comparison

Langfuse vs Weights & Biases Weave

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 →Weights & Biases Weave full profile →
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★Langfuse66
Weights & Biases Weave52
Score
vioscaleAI score
Langfuse66 / 100medium · 56%
Weights & Biases Weave52 / 100low · 25%
Pricing
Free tier
Langfuse✓
Weights & Biases Weave✓
Model
Langfusefreemium
Weights & Biases Weavefree
Price level
Langfusefree
Weights & Biases Weavefree
Transparent
Langfuse✗
Weights & Biases Weave✗
Integrations
Count
Langfuse100
Weights & Biases Weave14
Security
Gdpr
Langfuse✓
Weights & Biases Weave–
Hipaa
Langfuse✓
Weights & Biases Weave–
Iso27001
Langfuse✓
Weights & Biases Weave–
Soc2
Langfuse✓
Weights & Biases Weave–
Trust center
Langfusehttps://langfuse.com/docs/security-and-guardrails
Weights & Biases Weave–
Vulnerabilities
Reliability
Status page
Langfuse✓
Weights & Biases Weave–
Adoption
Dependent repos
Langfuse0
Weights & Biases Weave–
Github stars
Langfuse35,781
Weights & Biases Weave–
Package downloads weekly
Langfuse6,493,381
Weights & Biases Weave–
Activity
Commits last 30d
Langfuse100
Weights & Biases Weave–
Release
History
Langfuse20 items
Weights & Biases Weave–
License
Spdx
LangfuseMIT
Weights & Biases Weave–
Language
Primary
LangfuseTypeScript
Weights & Biases Weave–
Market
Availability
LangfuseAvailable worldwide
Weights & Biases Weave–
Content
Faq
Langfuse7 items
Weights & Biases Weave4 items

Capabilities

Feature-by-feature on the axes that matter for llm observability. “-” means undocumented, not absent.

Capabilities
Architecture model
LangfuseOpen source self hosted
Weights & Biases WeaveManaged cloud saas
Token cost and latency waterfall charts
Langfuse✓
Weights & Biases Weave-
Opentelemetry openllmetry native export support
Langfuse✓
Weights & Biases Weave-
Prompt playground and in dashboard replay
Langfuse✓
Weights & Biases Weave✓
Multi step agentic workflow distributed tracing
Langfuse✓
Weights & Biases Weave✓
User feedback score API for thumbs up down tags
Langfuse✓
Weights & Biases Weave-
Pii redaction and prompt content masking
Langfuse-
Weights & Biases Weave✓
Production ab testing of system prompts
Langfuse-
Weights & Biases Weave-
Automated anomaly detection for rate limits
Langfuse-
Weights & Biases Weave-
Native integration with langchain and llamaindex
Langfuse✓
Weights & Biases Weave✓
SOC2 type ii
Langfuse-
Weights & Biases Weave-
Mit or apache permissive oss license
Langfuse-
Weights & Biases Weave-
Pricing model
LangfuseFree open source
Weights & Biases Weave-

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

Weights & Biases Weave

Platform for observability and analysis of production AI agent systems, featuring distributed tracing across multi-agent workflows, built-in evaluation APIs for model and prompt testing, and safety guardrails with pre-built scorers for toxicity, bias, PII detection, and hallucinations.

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 ↗

Weights & Biases Weave

FreeFree tier
as of verify ↗

Platform & deployment

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

Platforms
Web
Langfuse✓
Weights & Biases Weave✓
Deployment
Cloud / SaaS
Langfuse✓
Weights & Biases Weave✓
Self-hosted
Langfuse✓
Weights & Biases Weave✗

Integrations

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

In common (4)
  • LangChain
  • Google ADK
  • LlamaIndex
  • OpenAI

Langfuse

Leader
24 total - 20 not shared
  • Vercel AI SDK
  • LiteLLM
  • Pydantic AI
  • CrewAI
  • LiveKit
  • Haystack
  • Anthropic
  • Amazon Bedrock
  • Azure OpenAI
  • Mistral AI
  • Google Gemini
  • xAI
  • vLLM
  • Groq
  • OpenAI SDK
  • Cohere
  • Elasticsearch
  • OpenSearch
  • Hugging Face
  • OpenTelemetry
Independently observed

Weights & Biases Weave

19 total - 15 not shared
  • Slack
  • CrowdStrike Falcon AIDR
  • OpenPI
  • CoreWeave
  • NVIDIA
  • JAX
  • PyTorch
  • OpenAI GPT-5.6
  • OpenAI GPT-5.5
  • Zhipu GLM-5.2
  • Alibaba Kimi 2.7
  • Anthropic Claude Opus 4.8
  • Webhooks
  • AWS Bedrock
  • Claude Code
Independently observed
Still deciding?

Langfuse or Weights & Biases Weave: 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.