LangChain vs RAGStack
LangChain
langchain.comRAGStack
github.comSide by side
| Figure | LangChain | RAGStack |
|---|---|---|
| Price from | $39/mo | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | — | Yes |
| API | Yes | — |
| Self-hosted | Yes | Yes |
| Plans published | 4 | 1 |
| Spec score · Retrieval-Augmented Generation Tools | 8.2 (#11) | 7.5 (#21) |
| Founded | 2023 | 2010 |
| Headquarters | San Francisco, United States | Santa Clara, California, United States |
| Purpose | LangChain is an open-source framework that provides a pre-built agent architecture and integrations for models and tools. | RAGStack is a curated stack of open-source software for building production-ready retrieval-augmented generation applications. |
| Support | The LangSmith Developer plan includes community support, while the Enterprise plan includes a support SLA. | The documentation describes enterprise support and SLAs for RAGStack when running in Astra DB. |
Plans
LangChain
- Developer (LangSmith)Free
- LangChain frameworkFree
- Plus (LangSmith)$39 a month
- Enterprise (LangSmith)Priced on request
In their own words
LangChain
LangChain is a free, MIT-licensed open-source framework for building agents with models and tools. Its create_agent harness combines a model, tools, prompt and middleware, with templates for common uses and a ReAct pattern. Middleware can add human approval, conversation compression, sensitive-data removal, guardrails, retries, routing and custom tool policies. Agents run on LangGraph’s durable runtime, which supports persistence, rewind, checkpointing and human-in-the-loop workflows. LangChain documents more than 1,000 integrations across chat and embedding models, tools, toolkits, document loaders and vector stores. Standard interfaces for chat models and embeddings support switching providers with minimal code changes. Documentation covers Python and JavaScript/TypeScript. LangSmith adds tracing, debugging and output evaluation. The framework supports API and self-hosted use. LangChain was started in 2023 and is headquartered in San Francisco.