--- title: "lagent vs langchain" type: "comparison" canonical_url: "https://www.graphcanon.com/compare/internlm-lagent-vs-langchain-ai-langchain" tools: ["internlm-lagent", "langchain-ai-langchain"] --- # lagent vs langchain *GraphCanon updated Jul 11, 2026* ## Verdict Pick lagent when license: lagent is Apache-2.0, langchain is MIT; pick langchain when license: langchain is MIT, lagent is Apache-2.0. [lagent](https://github.com/InternLM/lagent) reports 2.3k GitHub stars, 236 forks, and 23 open issues, last pushed Jul 6, 2026. [langchain](https://docs.langchain.com/langchain/) has 142k stars, 24k forks, and 419 open issues, last pushed Jul 11, 2026. Figures are from public GitHub metadata via [lagent's repository](https://github.com/InternLM/lagent) and [langchain's repository](https://github.com/langchain-ai/langchain). | | [lagent](/tools/internlm-lagent.md) | [langchain](/tools/langchain-ai-langchain.md) | | --- | --- | --- | | Tagline | A lightweight framework for building LLM-based agents | The agent engineering platform. | | Stars | 2,268 | 141,504 | | Forks | 236 | 23,516 | | Open issues | 23 | 419 | | Language | Python | Python | | Adopt for | - | 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 | | Persona | - | - | | Runtime | - | - | | License | Apache-2.0 | MIT License, allowing free use for both personal and commercial purposes under its stipulated terms. | | Categories | Model Training, LLM Frameworks, AI Agents | LLM Frameworks, AI Agents | ## Trust and health _Sourced signals - not a safety guarantee. No winner column._ | | [lagent](/tools/internlm-lagent.md) | [langchain](/tools/langchain-ai-langchain.md) | | --- | --- | --- | | Days since push | 5d | 0d | | Open issues (now) | 23 | 419 | | Full report | [trust report](/tools/internlm-lagent/trust.md) | [trust report](/tools/langchain-ai-langchain/trust.md) | ## Decision facts: langchain - **Pricing:** freemium - LangChain itself is open-source and free to use. However, it might rely on paid services or premium models from external platforms like OpenAI. - **Adopt for:** 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 - **License detail:** MIT License, allowing free use for both personal and commercial purposes under its stipulated terms. ## Choose when ### Choose lagent if… - License: lagent is Apache-2.0, langchain is MIT. - Tags unique to lagent: llm, python, gpt, transformers. - Also covers Model Training. ### Choose langchain if… - License: langchain is MIT, lagent is Apache-2.0. - 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.. - Tags unique to langchain: agents, gemini, deepagents, generative-ai. - * 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 lagent - Model Training: Try prompting and RAG first; fine-tuning is the answer to style/format, not missing knowledge. - LLM Frameworks: Avoid a framework for a single prompt-and-retrieve call; the abstraction can cost more than it saves. - AI Agents: Don't use an agent loop when a deterministic workflow would do; agents add latency, cost, and non-determinism. ## 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. ## Common questions ### What is the difference between lagent and langchain? lagent: A lightweight framework for building LLM-based agents. langchain: The agent engineering platform.. See the comparison table for live GitHub stats and shared categories. ### When should I choose lagent over langchain? Choose lagent over langchain when License: lagent is Apache-2.0, langchain is MIT; Tags unique to lagent: llm, python, gpt, transformers; Also covers Model Training. ### When should I choose langchain over lagent? Choose langchain over lagent when License: langchain is MIT, lagent is Apache-2.0; 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.; Tags unique to langchain: agents, gemini, deepagents, generative-ai; * 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 avoid lagent? Model Training: Try prompting and RAG first; fine-tuning is the answer to style/format, not missing knowledge. LLM Frameworks: Avoid a framework for a single prompt-and-retrieve call; the abstraction can cost more than it saves. AI Agents: Don't use an agent loop when a deterministic workflow would do; agents add latency, cost, and non-determinism. ### 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. ### Is lagent or langchain more popular on GitHub? langchain has more GitHub stars (141,504 vs 2,268). Stars measure visibility, not whether either tool fits your constraints. ### Are lagent and langchain open source? Yes - both are open-source projects on GitHub (lagent: Apache-2.0, langchain: MIT). ### Where can I find alternatives to lagent or langchain? GraphCanon lists graph-backed alternatives at [lagent alternatives](/tools/internlm-lagent/alternatives) and [langchain alternatives](/tools/langchain-ai-langchain/alternatives) ([lagent markdown twin](/tools/internlm-lagent/alternatives.md), [langchain markdown twin](/tools/langchain-ai-langchain/alternatives.md)), 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](/compare/internlm-lagent-vs-langchain-ai-langchain.md) mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers. ### Which is better maintained, lagent or langchain? lagent: Very active. langchain: 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 lagent and langchain? GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: [lagent trust report](/tools/internlm-lagent/trust); [langchain trust report](/tools/langchain-ai-langchain/trust). --- **Machine-readable endpoints** - JSON: [`/api/graphcanon/graph?tool=internlm-lagent`](/api/graphcanon/graph?tool=internlm-lagent) - LLM index: [/llms.txt](/llms.txt) - Full corpus: [/llms-full.txt](/llms-full.txt) _GraphCanon - The knowledge graph for AI development. https://www.graphcanon.com/_