Haystack vs LangChain
On the evidence we track, LangChain leads this comparison with a composite score of 79/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.
Capabilities
Feature-by-feature on the axes that matter for mlops & llmops tools. “-” means undocumented, not absent.
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.
LangChain
LeaderA unified developer platform consisting of open-source frameworks and commercial tools for building, testing, monitoring, and deploying AI agents and LLM-powered applications.
Pricing
List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.
Haystack
Free open-source core with paid enterprise support available
- Open SourceFree
- EnterpriseContact sales
LangChain
LeaderFree Developer plan. Plus plan from $39/user/mo with unlimited seats. Enterprise custom pricing billed annually.
- DeveloperFree
- 1 free seat
- 5000 base traces per month
- Full LangSmith access
- Plus$39/seat/month, unlimited seats, 10k traces/month included
- Unlimited seats
- 10000 base traces per month
- 1 free small serverless deployment
- Team collaboration
- LangSmith Deployment service access
- EnterpriseContact sales
- Advanced administration options
- Enhanced security controls
- Priority support
- Custom deployment options
Platform & deployment
Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.
Integrations
What each product connects to. Counts come from the vendor's own integration directory where one exists.
- OpenAI
- Anthropic
- Azure OpenAI
- Cohere
Haystack
- Mistral
- Hugging Face
- Weaviate
- Pinecone
- Elasticsearch
- AstraDB
- Apify
- ReadMe
- Datadog
- OpenTelemetry
- SerperDev
- SearchApi
- AWS Bedrock
- FAISS
- AWS SageMaker
- OpenSearch
- Google Colab
- MCP servers
- Amazon Bedrock
- Claude
- Amazon S3
- Meta
- Stability AI
- AI21 Labs
LangChain
Leader- Azure AI Search
- Microsoft Fabric
- Azure Kubernetes Service
- OpaquePrompts
- AWS
- MCP (Model Context Protocol)
Haystack or LangChain: 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.