vioscaleAI
Comparison

Haystack vs Langfuse

No clear leader: Langfuse (66.4) and Haystack (65.8) are within the 5-point margin; treat as a tie. The attribute-by-attribute breakdown below, with a source and date on every value, is the honest way to compare them.

Haystack full profile →Langfuse full profile →
Machine formatsMarkdownJSONGraphQLMarkdown is open. JSON and GraphQL need a free key.
Haystack66
Langfuse66
Score
vioscaleAI score
Haystack66 / 100medium · 68%
Langfuse66 / 100medium · 56%
Pricing
Free tier
Haystack✓
Langfuse✓
Model
Haystackfreemium
Langfusefreemium
Price level
Haystacklow
Langfusefree
Transparent
Haystack✗
Langfuse✗
Integrations
Count
Haystack9
Langfuse100
Security
Gdpr
Haystack–
Langfuse✓
Hipaa
Haystack–
Langfuse✓
Iso27001
Haystack–
Langfuse✓
Scorecard
Haystack9.4
Langfuse–
Soc2
Haystack–
Langfuse✓
Trust center
Vulnerabilities
Reliability
Status page
Haystack–
Langfuse✓
Adoption
Dependent repos
Haystack237
Langfuse0
Github stars
Haystack26,738
Langfuse35,781
Package downloads weekly
Haystack121,930
Langfuse6,493,381
Activity
Commits last 30d
Haystack100
Langfuse100
Release
Cadence days
Haystack2
Langfuse–
History
Haystack20 items
Langfuse20 items
License
Spdx
HaystackApache-2.0
LangfuseMIT
Language
Primary
HaystackPython
LangfuseTypeScript
Market
Availability
Content
Faq
Haystack6 items
Langfuse7 items

Capabilities

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

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

What each one is

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

Haystack

A Python-based orchestration framework for building production-ready AI applications with modular pipelines, agent workflows, and retrieval-augmented generation (RAG). Provides explicit control over retrieval, reasoning, memory, tools, and generation components, supporting everything from simple semantic search to complex multi-step agent systems.

Independently observed

Langfuse

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

Pricing

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

Haystack

HybridFree tier

Free open-source core with paid enterprise support available

  • Open SourceFree
  • EnterpriseContact sales
as of verify ↗

Langfuse

SubscriptionFree tier

Multiple tiers available; specific pricing not shown in provided text

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

Platform & deployment

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

Platforms
Web
Haystack✓
Langfuse✓
CLI
Haystack✓
Langfuse✗
Deployment
Cloud / SaaS
Haystack✓
Langfuse✓
Self-hosted
Haystack✓
Langfuse✓
On-premise
Haystack✓
Langfuse✗

Integrations

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

In common (9)
  • OpenAI
  • Anthropic
  • Hugging Face
  • Elasticsearch
  • Azure OpenAI
  • OpenTelemetry
  • Cohere
  • OpenSearch
  • Amazon Bedrock

Haystack

28 total - 19 not shared
  • Mistral
  • Weaviate
  • Pinecone
  • AstraDB
  • Apify
  • ReadMe
  • Datadog
  • SerperDev
  • SearchApi
  • AWS Bedrock
  • FAISS
  • AWS SageMaker
  • Google Colab
  • MCP servers
  • Claude
  • Amazon S3
  • Meta
  • Stability AI
  • AI21 Labs
Independently observed

Langfuse

24 total - 15 not shared
  • LangChain
  • Vercel AI SDK
  • LiteLLM
  • Pydantic AI
  • Google ADK
  • CrewAI
  • LiveKit
  • Haystack
  • LlamaIndex
  • Mistral AI
  • Google Gemini
  • xAI
  • vLLM
  • Groq
  • OpenAI SDK
Independently observed
Still deciding?

Haystack or Langfuse: 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.