--- title: "langchain-chat-websockets vs llm-chain" type: "comparison" canonical_url: "https://www.graphcanon.com/compare/pors-langchain-chat-websockets-vs-sobelio-llm-chain" tools: ["pors-langchain-chat-websockets", "sobelio-llm-chain"] --- # langchain-chat-websockets vs llm-chain *GraphCanon updated Aug 15, 2026* ## Verdict Pick langchain-chat-websockets if async live chat with streaming responses over websockets using FastAPI and OpenAI API; pick llm-chain if `llm-chain` is a Rust crate for creating chains in large language models to summarize text and perform complex tasks. [langchain-chat-websockets](https://github.com/pors/langchain-chat-websockets) reports 96 GitHub stars, 8 forks, and 3 open issues, last pushed Nov 30, 2023. [llm-chain](https://llm-chain.xyz) has 1.6k stars, 141 forks, and 41 open issues, last pushed Oct 31, 2024. Figures are from public GitHub metadata via [langchain-chat-websockets's repository](https://github.com/pors/langchain-chat-websockets) and [llm-chain's repository](https://github.com/sobelio/llm-chain). | | [langchain-chat-websockets](/tools/pors-langchain-chat-websockets.md) | [llm-chain](/tools/sobelio-llm-chain.md) | | --- | --- | --- | | Tagline | LangChain LLM chat with streaming response over websockets | `llm-chain` is a Rust crate for building chains in large language models | | Stars | 96 | 1,605 | | Forks | 8 | 141 | | Open issues | 3 | 41 | | Language | HTML | Rust | | Adopt for | Async live chat with streaming responses over websockets using FastAPI and OpenAI API. | `llm-chain` is a Rust crate for creating chains in large language models to summarize text and perform complex tasks. | | Persona | - | - | | Runtime | - | - | | License | Apache-2.0 | The MIT License provides permissive use for open-source projects, commercial products, and other uses. | | Categories | Inference & Serving, LLM Frameworks | Inference & Serving, LLM Frameworks | ## Trust and health _Sourced signals - not a safety guarantee. No winner column._ | | [langchain-chat-websockets](/tools/pors-langchain-chat-websockets.md) | [llm-chain](/tools/sobelio-llm-chain.md) | | --- | --- | --- | | Days since push | 988d | 653d | | Open issues (now) | 3 | 41 | | Stars delta | -1 (30d) | +3 (30d) | | Owner type | User | Organization | | Full report | [trust report](/tools/pors-langchain-chat-websockets/trust.md) | [trust report](/tools/sobelio-llm-chain/trust.md) | ## Decision facts: langchain-chat-websockets - **Adopt for:** Async live chat with streaming responses over websockets using FastAPI and OpenAI API. ## Decision facts: llm-chain - **Pricing:** freemium - Free to use under the MIT license. - **Requirements:** Min 1 GB RAM; Requires Rust 1.65.0 or newer and OpenAI API key for some functionality. - **Adopt for:** `llm-chain` is a Rust crate for creating chains in large language models to summarize text and perform complex tasks. - **License detail:** The MIT License provides permissive use for open-source projects, commercial products, and other uses. ## Choose when ### Choose langchain-chat-websockets if… - langchain-chat-websockets is primarily HTML; llm-chain is Rust. - License: langchain-chat-websockets is Apache-2.0, llm-chain is MIT. - Tags unique to langchain-chat-websockets: async, fastapi, openai-api, websockets. - langchain-chat-websockets ships Docker support for self-hosted deployment. - Need async, real-time chat response functionality integrated via websocket connections. ### Choose llm-chain if… - llm-chain is primarily Rust; langchain-chat-websockets is HTML. - License: llm-chain is MIT, langchain-chat-websockets is Apache-2.0. - Pricing: Free to use under the MIT license.. - Requirements: Min 1 GB RAM; Requires Rust 1.65.0 or newer and OpenAI API key for some functionality.. - Tags unique to llm-chain: chatgpt, llama, openai, rust. - - When you are working specifically with Rust and want to leverage its performance benefits. ## When NOT to use langchain-chat-websockets - Project doesn't require asynchronous interaction or streaming responses over websockets. - Prefer alternatives that allow customization beyond FastAPI and OpenAI integration. ## When NOT to use llm-chain - - If your development stack is predominantly in languages that cannot easily integrate Rust libraries, such as Python-dominant environments. - - For teams lacking Rust proficiency since setting up and using `llm-chain` requires proficiency with Rust's package management and compilation process. ## Common questions ### What is the difference between langchain-chat-websockets and llm-chain? langchain-chat-websockets: LangChain LLM chat with streaming response over websockets. llm-chain: `llm-chain` is a Rust crate for building chains in large language models. See the comparison table for live GitHub stats and shared categories. ### When should I choose langchain-chat-websockets over llm-chain? Choose langchain-chat-websockets over llm-chain when langchain-chat-websockets is primarily HTML; llm-chain is Rust; License: langchain-chat-websockets is Apache-2.0, llm-chain is MIT; Tags unique to langchain-chat-websockets: async, fastapi, openai-api, websockets; langchain-chat-websockets ships Docker support for self-hosted deployment; Need async, real-time chat response functionality integrated via websocket connections. ### When should I choose llm-chain over langchain-chat-websockets? Choose llm-chain over langchain-chat-websockets when llm-chain is primarily Rust; langchain-chat-websockets is HTML; License: llm-chain is MIT, langchain-chat-websockets is Apache-2.0; Pricing: Free to use under the MIT license.; Requirements: Min 1 GB RAM; Requires Rust 1.65.0 or newer and OpenAI API key for some functionality.; Tags unique to llm-chain: chatgpt, llama, openai, rust; - When you are working specifically with Rust and want to leverage its performance benefits. ### When should I avoid langchain-chat-websockets? Project doesn't require asynchronous interaction or streaming responses over websockets. Prefer alternatives that allow customization beyond FastAPI and OpenAI integration. ### When should I avoid llm-chain? - If your development stack is predominantly in languages that cannot easily integrate Rust libraries, such as Python-dominant environments. - For teams lacking Rust proficiency since setting up and using `llm-chain` requires proficiency with Rust's package management and compilation process. ### Is langchain-chat-websockets or llm-chain more popular on GitHub? llm-chain has more GitHub stars (1,605 vs 96). Stars measure visibility, not whether either tool fits your constraints. ### Are langchain-chat-websockets and llm-chain open source? Yes - both are open-source projects on GitHub (langchain-chat-websockets: Apache-2.0, llm-chain: MIT). ### Where can I find alternatives to langchain-chat-websockets or llm-chain? GraphCanon lists graph-backed alternatives at [langchain-chat-websockets alternatives](/tools/pors-langchain-chat-websockets/alternatives) and [llm-chain alternatives](/tools/sobelio-llm-chain/alternatives) ([langchain-chat-websockets markdown twin](/tools/pors-langchain-chat-websockets/alternatives.md), [llm-chain markdown twin](/tools/sobelio-llm-chain/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/pors-langchain-chat-websockets-vs-sobelio-llm-chain.md) mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers. ### Which is better maintained, langchain-chat-websockets or llm-chain? langchain-chat-websockets: Dormant. llm-chain: Dormant. 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-chat-websockets and llm-chain? GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: [langchain-chat-websockets trust report](/tools/pors-langchain-chat-websockets/trust); [llm-chain trust report](/tools/sobelio-llm-chain/trust). --- **Machine-readable endpoints** - JSON: [`/api/graphcanon/graph?tool=pors-langchain-chat-websockets`](/api/graphcanon/graph?tool=pors-langchain-chat-websockets) - 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/_