Best Open Source chatbots Libraries

A curated list of the most popular GitHub repositories tagged with chatbots. Select any project to visualize its architecture and dive into the codebase using RepoMind's AI engine.

#1xtekky/gpt4free

The official gpt4free repository | various collection of powerful language models | opus 4.6 gpt 5.3 kimi 2.5 deepseek v3.2 gemini 3

65,721Python

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#2mem0ai/mem0

Universal memory layer for AI Agents

47,726Python

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#3asgeirtj/system_prompts_leaks

Collection of extracted System Prompts from popular chatbots like ChatGPT, Claude & Gemini

32,374HTML

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#4mastra-ai/mastra

From the team behind Gatsby, Mastra is a framework for building AI-powered applications and agents with a modern TypeScript stack.

21,267TypeScript

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#5RasaHQ/rasa

💬 Open source machine learning framework to automate text- and voice-based conversations: NLU, dialogue management, connect to Slack, Facebook, and more - Create chatbots and voice assistants

21,057Python

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#6tinode/chat

Instant messaging platform. Backend in Go. Clients: Swift iOS, Java Android, JS webapp, scriptable command line; chatbots

13,093Go

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#7Tencent/WeKnora

LLM-powered framework for deep document understanding, semantic retrieval, and context-aware answers using RAG paradigm.

13,064Go

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