LangChain

The model-app framework, batteries in.

Agent frameworks MIT Open source Checked 2026-08-15

The record

Verified by hand

Category: Agent frameworks
License: MIT
Open source: Yes
Self-host: Yes

Entry price: Free
Rank in category: #1 of 12
Website: www.langchain.com
Price check: Confirmed against official page

Our take

In progress

LangChain sits at #1 in Agent frameworks by adoption. The verified facts are above; the full editorial assessment — where it wins, where it doesn't, and what to reach for instead — is being written and will land here.

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Alternatives in Agent frameworks

Ranked

LangGraph#2

Stateful multi-agent orchestration.

FreeMIT

CrewAI#3

Role-based multi-agent crews.

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LlamaIndex#4

RAG-grounded agent workflows.

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OpenAI Agents SDK#5

Lightweight agents + handoffs.

FreeMIT

Sources

Checked 2026-08-15

Official sitewww.langchain.com✓ Price verified