173.4k
AutoGPT
AutoGPT is the vision of accessible AI for everyone, providing tools to focus on what matters in building and utilizing AI.
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AI👨💻
Development🛠️
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21 Open Source Alternatives to LangChain
Looking for an open-source alternative to LangChain? Below are 21 community-built tools that offer similar functionality — all free, open source, and ready to use or self-host. Ranked by GitHub stars.
137.3k
Dify
A production-ready platform facilitating the development of agentic workflows with robust features and integration capabilities.
👨💻
Development🤖
AI⚡
Productivity🛠️
Tools
77.8k
RAGFlow
RAGFlow is a leading open-source Retrieval-Augmented Generation (RAG) engine that combines advanced RAG methods with Agent capabilities, delivering a superior, context-rich experience for Large Language Models (LLMs). It enables efficient information retrieval and contextual augmentation, optimizing generative AI pipelines.
🤖
AI🔁
API🧰
Framework🛠️
Tools
60.5k
Deer-flow
DeerFlow is a community-driven Deep Research framework, combining language models with tools like web search, crawling, and Python execution, while contributing back to the open-source community. It enables enhanced research capabilities through integration with various technologies.
🤖
AI👨💻
Development🌐
Web🐍
Python
41.0k
Anything-llm
The all-in-one Desktop & Docker AI application with built-in Retrieval-Augmented Generation (RAG), AI agents, No-code agent builder, and more.
🤖
AI👨💻
Development⚙️
DevOps💻
Desktop
37.5k
Quivr
An opinionated RAG framework for integrating Generative AI into your applications, enabling easy customization and focus on product development with support for various LLMs and vector stores.
🤖
AI👨💻
Development🛠️
Tools
33.3k
AgentGPT
AgentGPT enables users to assemble, configure, and deploy autonomous AI agents directly within their browser, simplifying the development and deployment of AI solutions.
🤖
AI👨💻
Development🌐
Web
27.7k
Sim
Sim Studio is an open-source AI agent workflow builder. Sim Studio's interface is a lightweight, intuitive way to quickly build and deploy LLMs that connect with your favorite tools.
👨💻
Development🤖
AI🛠️
Tools🌐
Web
25.9k
LightRAG
LightRAG is a simple and fast Retrieval-Augmented Generation (RAG) framework, designed to enhance large language models with efficient retrieval mechanisms. Developed as part of EMNLP 2025, it focuses on streamlined performance and ease of integration for natural language processing tasks.
🤖
AI👨💻
Development🛠️
Tools
23.2k
LibreChat
LibreChat is an enhanced ChatGPT clone offering features like agents, DeepSeek, Anthropic, AWS, OpenAI integration, and more. It allows secure multi-user authentication, AI model switching, message search, and supports various AI models and tools for a comprehensive chat experience. It is open-source and self-hostable.
🤖
AI⚙️
DevOps🔁
API
22.9k
Mastra
mastra is a powerful TypeScript AI agent framework designed for building intelligent assistants, retrieval-augmented generation (RAG) systems, and advanced observability features. It supports integration with any large language model (LLM), including GPT-4, Claude, Gemini, and Llama.
🤖
AI👨💻
Development🔷
TypeScript🧰
Framework
22.0k
Letta
Letta is an open AI platform for building stateful agents with advanced memory, learning, and self-improvement capabilities. It enables the creation of intelligent agents that remember, adapt, and evolve over time.
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AI🧰
Framework🛠️
Tools
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19.6k
Suna
Suna is an open source generalist AI agent designed to handle a wide range of tasks autonomously.
🤖
AI👨💻
Development🔨
Utils
16.0k
SuperAGI
SuperAGI is a developer-friendly open source autonomous AI agent framework, enabling developers to build, manage, and run useful autonomous agents quickly and reliably.
🤖
AI👨💻
Development🧰
Framework
13.4k
Unstructured
Unstructured is an open-source ETL solution that converts complex documents into structured data for language models, featuring enterprise-grade capabilities like workflow orchestration, document partitioning, enrichment, chunking, and embedding.
🤖
AI🔬
Data Science👨💻
Development🛠️
Tools
12.1k
Rowboat
Rowboat is an AI-powered multi-agent builder that enables the creation of sophisticated AI systems with ease.
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AI👨💻
Development🛠️
Tools
4.4k
Ragapp
Ragapp provides the easiest way to implement Agentic Retrieval-Augmented Generation (RAG) capabilities in enterprise environments, enhancing AI-driven search and knowledge management with minimal setup.
🤖
AI🛠️
Tools⚡
Productivity
2.6k
Voltagent
Open Source TypeScript AI Agent Framework for building smart applications.
🤖
AI🧰
Framework🔷
TypeScript
2.2k
Openai-apps-sdk-examples
A collection of example applications demonstrating the usage and features of the OpenAI Apps SDK, providing practical reference implementations for developers integrating with the SDK.
👨💻
Development🤖
AI🛠️
Tools
1.4k
Evalite
Evaluate your LLM-powered applications effectively with TypeScript. Evalite provides tools and interfaces to test and improve the performance of your language model based applications.
👨💻
Development🤖
AI🔷
TypeScript🧪
Testing
106
Open-agents-builder
AI Agents are missing the UI! We're here to change it. Build Business AI Agents for your company: business workflows, APIs, bookings, e-commerce, social commerce, B2B, CPQ, intake forms, NPS tests, and made-to-order use cases.
🤖
AI🌐
Web👨💻
Development
Frequently asked questions
What are the best open-source alternatives to LangChain?
The top picks from this list are AutoGPT, Dify, RAGFlow — all maintained, free to use, and self-hostable.
Are these alternatives to LangChain free?
Yes. Every tool listed here is open source and free to use. Many can be self-hosted on your own infrastructure, which means no subscription fees and full control over your data.
Can I self-host an alternative to LangChain?
Most of the alternatives listed are self-hostable. Check each tool's page for hosting details, system requirements, and licensing terms.
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