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235 tools · 33 stacks

AI tools are all over the place. This is the full landscape — 247 tools across 21 categories, mapped and connected. Ready to narrow it down? Build your stack →

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What are you building and how is it defined?
How do you write and ship code?
How does your AI think and act?
Which models and infrastructure power it?
How do you build, observe, and extend it?
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These tools integrates with
LangChain
vs
OpenAI API

Choose LangChain when…

  • •You want a broad, flexible LLM orchestration toolkit
  • •You need integrations with many tools and data sources
  • •You're prototyping or exploring LLM app patterns

Choose OpenAI API when…

  • •You need the broadest ecosystem and most integrations
  • •GPT-4 or o-series reasoning models are required
  • •Assistants API, fine-tuning, or batch API are needed
Field
LangChain
OpenAI API
Category
Pipelines & RAG
LLM Infrastructure
Type
OSS
SaaS
Free Tier
✓ Yes
✗ No
Plans
—
API: Per token
Stars
⭐ 93,000
—
Health
●100 — Active
—
Trajectory
— not enough data
— not enough data
Synced
today
—

LangChain

Most widely used framework for building LLM applications. Chains, agents, RAG pipelines, and deep integrations with 300+ tools.

OpenAI API

API access to GPT-5, GPT-5.5, o3/o4 reasoning models, and the Responses API; plus embeddings, image, audio, and Realtime endpoints. The most widely deployed LLM API in production.

LangChain Website ↗GitHub ↗
OpenAI API Website ↗

Shared Connections (12)

CrewAIAutoGenLlamaIndexLiteLLMLangfuseAnthropic APIPortKeyVercel AI SDKGalileoFal.aiZepRAGFlow

Only LangChain (21)

OpenHandsLangGraphSemantic KernelLangSmithQdrantChromaPineconeWeaviate

Only OpenAI API (26)

LangChainMastraPydanticAIsmolagentsAgnoHeliconeMistral APICohere API
See full comparison in Explore →