LangChain

LangChain is the most popular framework for building LLM-powered applications, with 700+ integrations for vector stores, tools, APIs, and memory. It handles prompt chaining, RAG pipelines, and agent workflows out of the box. Best for developers building complex AI applications that combine multiple models and data sources.

AI ToolFree Tier: MITCompany: LangChain Inc.Category: Open-Source ModelsOpen Source: YesQuick Start: Install with 'pip install langchain' → Set your LLM API key and build a simple chain → Add retrieval (RAG) or tool use for more complex workflows

LangChain

LLM orchestration — 700+ integrations

Visit LangChain →

LangChain is the most popular framework for building LLM-powered applications, with 700+ integrations for vector stores, tools, APIs, and memory. It handles prompt chaining, RAG pipelines, and agent workflows out of the box. Best for developers building complex AI applications that combine multiple models and data sources.

FREE TIER
MIT
COMPANY
LangChain Inc.
CATEGORY
Open-Source Models › ML Frameworks
OPEN SOURCE
Yes
PRIVACY
Self-hosted
TAGS
orchestrationrag

QUICK START

Install with 'pip install langchain' → Set your LLM API key and build a simple chain → Add retrieval (RAG) or tool use for more complex workflows

BEST FOR

  • ▸Developers building complex LLM apps needing 700+ integrations and custom logic.
  • ▸Engineers architecting robust RAG, agent, and multi-step prompt chaining workflows.
  • ▸Teams requiring an open-source, self-hosted framework for LLM orchestration.

NOT FOR

  • ✕Non-technical users or those seeking no-code solutions for simple LLM tasks.
  • ✕Beginners who prefer UI-driven tools over code-heavy AI development frameworks.

◈ TYPICALLY PAIRED WITH

Tools that appear alongside LangChain in AIArsenal's curated stacks.

Google Colab
Free T4/K80 GPU — 12-hour sessions, 15GB Drive
Infrastructure
Kaggle Notebooks
30 hrs/week P100 + free TPU v3-8 — no credit card
Infrastructure
Lightning AI
~35 hrs/month T4 + 24/7 CPU studio + 100GB storage
Infrastructure
HF ZeroGPU
Free H200 (70GB VRAM) dynamic allocation — $10M commitment
Infrastructure
Finding similar tools…
← Back to all tools