LangChain
Python framework of interoperable components and integrations for building agents and LLM apps, with LangGraph and Deep Agents layered above it.
Harness by LangChain
Chalk Labs
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Install
From the package registry. Read the repository before you give any tool access to your data.
pip install langchain
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About
Use cases: agent-orchestration, knowledge-base
Reviews
Write a reviewNo reviews yet. Installed it? Reviews come from verified installers only. How reviews work
Fact sheet
- Languages
- PythonREADME
- Packages
- langchain (pypi)README
- Observability
- LangSmithREADME
- Deploys to
- langsmith-deploymentREADME
- Maturity
- Stablegithub.com
Facts extracted by Claude Sonnet 5.5 from the linked sources on Oct 24, 2026; reviewed Oct 24, 2026. Wrong fact? Tell us.
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Featured in
Signals
- Stars
- 148,371
- Forks
- 24,904
- Open issues
- 551
- Weekly downloads
- 37,334,710
- Last commit
- Oct 24, 2026 (7 days ago)
- Last release
- Oct 22, 2026 (8 days ago)
- Last package publish
- Oct 21, 2026 (9 days ago)
From GitHub (fetched Oct 24, 2026) and the package registry.
Details
- Packages
- pypi
langchain - License
- MIT
- Repository
- github.com/langchain-ai/langchain
- Website
- www.langchain.com/
- First seen
- Oct 24, 2026
- Last checked
- Oct 24, 2026
More from LangChain
- 0.748score
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Low-level Python orchestration framework for long-running stateful agents, with durable execution, human review points and short- and long-term memory.
HarnessAFreshness: A★ 43.8K↓ 13.1M/wk - 0.740score
Deep Agents
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Opinionated agent harness on LangGraph with sub-agents, filesystem access, context management, persistent memory and approval of tool calls.
HarnessAFreshness: A★ 30.6K↓ 1.9M/wk - 0.717score
LangGraph.js
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Open-source agent harness from LangChain for building agents with code, with LangSmith for testing and monitoring.
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LangMem
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Library that lets LangGraph agents extract, consolidate and search their own long-term memory.
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JavaScript and TypeScript framework of interoperable components for building LLM apps and agents, with LangGraph.js and Deep Agents above it.
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Deep Agents (JavaScript)
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The batteries included agent harness.
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Done for you
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Chalk Labs is a two-founder AI and growth studio. We build AI agents, CRMs and MVPs for Web3 and AI companies, and have shipped 50+ product and token launches.
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Rahil Jain, Co-founder, Chalk Labs. Ex-Goldman Sachs engineer. You talk to the person who builds it.
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Cite this page
LangChain. Agent Mart. https://agentmart.dev/harnesses/langchain (last updated 2026-10-24)