Comparison
langchain vs langchainjs
Verdict
Pick langchain if langChain is a Python framework for building agents and LLM-powered applications, offering interoperable components and third-party integrations to simplify AI application development; pick langchainjs if langChain.js is a TypeScript-based tool designed for building AI agents. It simplifies the development process with its specific focus and ease of installation via popular package managers.
Markdown twin · langchain alternatives · langchainjs alternatives
GraphCanon updated Sep 30, 2026
12views this month
vs
Trust & integrity
| Signal | langchain | langchainjs |
|---|---|---|
| Maintenance | Very active (0d since push) As of Sep 18, 2026 · github_public_v1 | Very active (1d since push) As of Sep 7, 2026 · github_public_v1 |
| Provenance | Not a fork · Organization account As of Sep 18, 2026 · github_public_v1 | Not a fork · Organization account As of Sep 7, 2026 · github_public_v1 |
| OSV dependency advisories | No lockfile (source not queried) As of Sep 18, 2026 · osv@v1 | No lockfile (source not queried) As of Jul 11, 2026 · osv@v1 |
| deps.dev advisories | Not queried deps.dev@v1 | Not queried deps.dev@v1 |
| OpenSSF Scorecard | Not queried openssf-scorecard@v1 | Not queried openssf-scorecard@v1 |
Tagline
- langchain
- The agent engineering platform.
- langchainjs
- The agent engineering platform
Stars
- langchain
- 147k
- langchainjs
- 18k
Forks
- langchain
- 25k
- langchainjs
- 3.4k
Open issues
- langchain
- 541
- langchainjs
- 558
Language
- langchain
- Python
- langchainjs
- TypeScript
Adopt for
- langchain
- LangChain is a Python framework for building agents and LLM-powered applications, offering interoperable components and third-party integrations to simplify AI application development.
- langchainjs
- LangChain.js is a TypeScript-based tool designed for building AI agents. It simplifies the development process with its specific focus and ease of installation via popular package managers.
Persona
- langchain
- -
- langchainjs
- -
Runtime
- langchain
- -
- langchainjs
- -
License
- langchain
- MIT
- langchainjs
- MIT
Last pushed
- langchain
- Sep 18, 2026
- langchainjs
- Sep 6, 2026
Categories
- langchain
- AI Agents, LLM Frameworks
- langchainjs
- AI Agents, Developer Tools
Trust and health
Days since push
- langchain
- 0d
- langchainjs
- 1d
Open issues (now)
- langchain
- 541
- langchainjs
- 558
Stars delta
- langchain
- +3.0k (30d)
- langchainjs
- +144 (30d)
Open issues delta
- langchain
- +78 (30d)
- langchainjs
- +83 (30d)
Full report
- langchain
- Trust report
- langchainjs
- Trust report
Typed relationship
langchain alternative langchainjsThese appear to be the same project under different guises, given both are described as 'The agent engineering platform', likely differing by language implementations.
Shared compatibility
- LangChain · langchain: LangChain integration · langchainjs: LangChain integration
Choose langchain if…
- langchain is primarily Python; langchainjs is TypeScript.
- These appear to be the same project under different guises, given both are described as 'The agent engineering platform', likely differing by language implementations.
- Tags unique to langchain: agents, ai-agents, framework, langchain.
- Also covers LLM Frameworks.
- When you need a framework that simplifies chaining together interoperable components and third-party integrations for AI application development.
When NOT to use langchain
- If you prefer a framework that does not offer built-in capabilities for common usage patterns such as planning and subagents, as LangChain's Deep Agents provide these features.
- When you need a higher-level abstraction that does not require detailed agent orchestration, as LangChain's LangGraph is designed for low-level control over agent workflows.
Choose langchainjs if…
- langchainjs is primarily TypeScript; langchain is Python.
- These appear to be the same project under different guises, given both are described as 'The agent engineering platform', likely differing by language implementations.
- Also covers Developer Tools.
- - You are working specifically with TypeScript projects, as LangChain.js leverages TypeScript's strong typing to enhance agent-building quality.
When NOT to use langchainjs
- - When the project or team lacks experience with TypeScript. Since LangChain.js is built on TypeScript, leveraging its full potential might be challenging without proficiency in this language.
- - In scenarios requiring minimal dependencies where a lightweight setup is necessary. LangChain.js relies on specific installation methods and may not fit environments that restrict the use of package
- managers like npm or yarn
Explore
Sources
Every stat on this page traces to a dated GitHub sync, license file, enrichment field, or trust scan.
- GitHub stars (langchain-ai/langchain) · observed Sep 20, 2026
- GitHub forks (langchain-ai/langchain) · observed Sep 20, 2026
- Last push (langchain-ai/langchain) · observed Sep 18, 2026
- License file (MIT) · observed Sep 20, 2026
- Decision facts (enrichment) · observed Sep 18, 2026
- Trust scan (lockfile / OSV) · observed Sep 18, 2026
- GitHub stars (langchain-ai/langchainjs) · observed Sep 20, 2026
- GitHub forks (langchain-ai/langchainjs) · observed Sep 20, 2026
- Last push (langchain-ai/langchainjs) · observed Sep 6, 2026
- License file (MIT) · observed Sep 20, 2026
- Decision facts (enrichment) · observed Jul 11, 2026
- Trust scan (lockfile / OSV) · observed Jul 11, 2026
GitHub stars on cards: langchain 147k · langchainjs 18k (synced Sep 20, 2026).
Common questions
- What is the difference between langchain and langchainjs?
- langchain: The agent engineering platform.. langchainjs: The agent engineering platform. See the comparison table for live GitHub stats and shared categories.
- When should I choose langchain over langchainjs?
- Choose langchain over langchainjs when langchain is primarily Python; langchainjs is TypeScript; These appear to be the same project under different guises, given both are described as 'The agent engineering platform', likely differing by language implementations; Tags unique to langchain: agents, ai-agents, framework, langchain; Also covers LLM Frameworks; When you need a framework that simplifies chaining together interoperable components and third-party integrations for AI application development.
- When should I choose langchainjs over langchain?
- Choose langchainjs over langchain when langchainjs is primarily TypeScript; langchain is Python; These appear to be the same project under different guises, given both are described as 'The agent engineering platform', likely differing by language implementations; Also covers Developer Tools; - You are working specifically with TypeScript projects, as LangChain.js leverages TypeScript's strong typing to enhance agent-building quality.
- When should I avoid langchain?
- If you prefer a framework that does not offer built-in capabilities for common usage patterns such as planning and subagents, as LangChain's Deep Agents provide these features. When you need a higher-level abstraction that does not require detailed agent orchestration, as LangChain's LangGraph is designed for low-level control over agent workflows.
- When should I avoid langchainjs?
- - When the project or team lacks experience with TypeScript. Since LangChain.js is built on TypeScript, leveraging its full potential might be challenging without proficiency in this language. - In scenarios requiring minimal dependencies where a lightweight setup is necessary. LangChain.js relies on specific installation methods and may not fit environments that restrict the use of package managers like npm or yarn
- Is langchain or langchainjs more popular on GitHub?
- langchain has more GitHub stars (146,576 vs 18,164). Stars measure visibility, not whether either tool fits your constraints.
- Are langchain and langchainjs open source?
- Yes - both are open-source projects on GitHub (langchain: MIT, langchainjs: MIT).
- Where can I find alternatives to langchain or langchainjs?
- GraphCanon lists graph-backed alternatives at langchain alternatives and langchainjs alternatives (langchain markdown twin, langchainjs markdown twin), ranked by typed relationship edges rather than popularity votes.
- Is there a machine-readable version of this comparison?
- Yes. The markdown twin at this comparison mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers.
- Which is better maintained, langchain or langchainjs?
- langchain: Very active. langchainjs: Very active. Compare maintenance labels, days since push, and release cadence in the trust section below - stars alone do not measure maintenance.
- Where are the full trust reports for langchain and langchainjs?
- GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: langchain trust report; langchainjs trust report.