Comparison
langchain vs langchainjs
Verdict
Pick langchain if langChain is an open-source platform designed specifically for building agents and applications that leverage large language models (LLMs). It provides a standard framework to develop interoperable components and connect; 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.
Markdown twin · langchain alternatives · langchainjs alternatives
GraphCanon updated today
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Trust & integrity
| Signal | langchain | langchainjs |
|---|---|---|
| Maintenance | Very active (0d since push) As of 3d · github_public_v1 | Very active (0d since push) As of 2d · github_public_v1 |
| Provenance | Not a fork · Organization account As of 3d · github_public_v1 | Not a fork · Organization account As of 2d · github_public_v1 |
| OSV dependency advisories | No lockfile (source not queried) As of 6d · osv@v1 | No lockfile (source not queried) As of 6d · 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
- 142k
- langchainjs
- 18k
Forks
- langchain
- 24k
- langchainjs
- 3.3k
Open issues
- langchain
- 419
- langchainjs
- 412
Language
- langchain
- Python
- langchainjs
- TypeScript
Adopt for
- langchain
- LangChain is an open-source platform designed specifically for building agents and applications that leverage large language models (LLMs). It provides a standard framework to develop interoperable components and connect
- 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 License, allowing free use for both personal and commercial purposes under its stipulated terms.
- langchainjs
- MIT
Last pushed
- langchain
- Jul 14, 2026
- langchainjs
- Jul 14, 2026
Categories
- langchain
- AI Agents, LLM Frameworks
- langchainjs
- AI Agents, Developer Tools
Trust and health
Open issues (now)
- langchain
- 419
- langchainjs
- 412
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.
- Pricing: LangChain itself is open-source and free to use. However, it might rely on paid services or premium models from external platforms like OpenAI..
- 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, anthropic, chatgpt.
- Also covers LLM Frameworks.
- * When aiming to build complex AI-powered agents or applications requiring high-level capabilities like planning, subagent interaction, and file system operations.
When NOT to use langchain
- * When working on smaller, less complex projects where full-scale integration with sophisticated components is not necessary as LangChain's extensive features might introduce unnecessary complexity.
- * If you are primarily focused on JavaScript or TypeScript development as the primary focus of LangChain is Python. Although there is a JS/TS equivalent (LangChain.js), it may not offer the same depth
- * For projects requiring heavy customization at lower levels, where a more granular control over individual components is required rather than working with an integrated framework.
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.
- Tags unique to langchainjs: typescript.
- 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 Jul 14, 2026
- GitHub forks (langchain-ai/langchain) · observed Jul 14, 2026
- Last push (langchain-ai/langchain) · observed Jul 14, 2026
- License file (MIT) · observed Jul 14, 2026
- Decision facts (enrichment) · observed Jul 11, 2026
- Trust scan (lockfile / OSV) · observed Jul 11, 2026
- GitHub stars (langchain-ai/langchainjs) · observed Jul 15, 2026
- GitHub forks (langchain-ai/langchainjs) · observed Jul 15, 2026
- Last push (langchain-ai/langchainjs) · observed Jul 14, 2026
- License file (MIT) · observed Jul 15, 2026
- Decision facts (enrichment) · observed Jul 11, 2026
- Trust scan (lockfile / OSV) · observed Jul 11, 2026
GitHub stars on cards: langchain 142k · langchainjs 18k (synced Jul 14, 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; Pricing: LangChain itself is open-source and free to use. However, it might rely on paid services or premium models from external platforms like OpenAI.; 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, anthropic, chatgpt; Also covers LLM Frameworks; * When aiming to build complex AI-powered agents or applications requiring high-level capabilities like planning, subagent interaction, and file system operations.
- 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; Tags unique to langchainjs: typescript; 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?
- * When working on smaller, less complex projects where full-scale integration with sophisticated components is not necessary as LangChain's extensive features might introduce unnecessary complexity. * If you are primarily focused on JavaScript or TypeScript development as the primary focus of LangChain is Python. Although there is a JS/TS equivalent (LangChain.js), it may not offer the same depth * For projects requiring heavy customization at lower levels, where a more granular control over individual components is required rather than working with an integrated framework.
- 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 (141,713 vs 17,944). 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.