8 Best AstrBot Alternatives in 2026 (Open Source)
AstrBot — Open-source agent chatbot platform for building AI applications in instant messaging workflows. Open-source framework specifically designed for building and deploying AI agents within mainstream instant messaging platforms.
Short answer
- Closest match to AstrBot: LangBot.
- Most actively developed: nanobot (1,380 commits in the last 90 days).
- Fastest growing: nanobot (+690 GitHub stars in the last 30 days).
- No commit in 6+ months: Open Assistant API.
These 8 open-source tools do the same job. They are ordered by how closely they match AstrBot, with live GitHub data so you can see which projects are actively maintained.
| Tool | GitHub stars | Stars / 30d | Last commit |
|---|---|---|---|
| AstrBot(original) | 41.3k | +570 | 2026-10-02 |
| LangBot | 18.0k | +195 | 2026-10-02 |
| NanoClaw | 30.9k | +60 | 2026-10-01 |
| QwenPaw | 35.4k | +390 | 2026-09-30 |
| nanobot | 48.7k | +690 | 2026-10-02 |
| Open Assistant API | 367 | +1 | 2024-12-14 |
| coze-studio | 21.7k | +60 | 2026-07-29 |
| Agent Development Kit (ADK) | 21.7k | +30 | 2026-10-02 |
| UI-TARS-desktop | 39.2k | +195 | 2026-09-24 |
1. LangBot
Open-source platform for building AI-powered IM bots with LLMs, tool calling, and RAG knowledge bases
What sets it apart: Production-ready platform supporting multiple instant messaging platforms with built-in enterprise features like access control, rate limiting, and monitoring.
Best for: Building AI bots for multiple instant messaging platforms; Enterprises needing production-ready bot infrastructure; Developers wanting to connect LLMs to chat applications
2. NanoClaw
AI assistant running agents in Linux containers with messaging, memory, and scheduled jobs
What sets it apart: Provides OS-level container isolation for security instead of just application-level permission checks.
Best for: Teams needing secure, isolated AI agents; Users wanting a lightweight, understandable agent framework; Deploying agents across multiple messaging platforms
3. QwenPaw
Your Personal AI Assistant; easy to install, deploy on your own machine or on the cloud; supports multiple chat apps with easily extensible capabilities.
What sets it apart: A Python framework focused on building extensible personal AI assistants deployable across multiple chat interfaces.
Best for: Developers building personal AI assistants; Creating extensible agent systems; Deploying agents across chat platforms
4. nanobot
Open-source Python framework for self-hosted AI agents with WebUI, tools, memory, MCP, and automation
What sets it apart: Combines a small, readable core with persistent workflows, memory, and broad chat-native reach for personal, self-hosted agent development.
Best for: Developers seeking a lightweight, self-hosted agent framework; Personal AI automation projects; Integrating agents with multiple chat platforms
5. Open Assistant API
Open-source, self-hosted AI assistant API compatible with OpenAI and supporting LLMs, RAG, and tools
What sets it apart: Open-source OpenAI Assistant API compatible service supporting multiple LLMs via One API, with RAG, web search, and local deployment
Best for: self-hosted-openai-assistant-alternative; multi-llm-assistant-apps; enterprise-local-deployment
6. coze-studio
Open-source visual platform for creating, debugging, and deploying AI agents with no-code or low-code tools
What sets it apart: Fully open-source core engine derived from an enterprise platform serving millions of developers.
Best for: developers building AI agents visually; low-code AI product development; enterprises customizing agent business logic
7. Agent Development Kit (ADK)
An open-source, code-first Python toolkit for building, evaluating, and deploying sophisticated AI agents with flexibility and control.
What sets it apart: Applies software development principles and a graph-based runtime to AI agent creation for deterministic execution flows.
Best for: Developers seeking a code-first Python framework; Building complex, orchestrated agent workflows; Teams needing modular and testable agent systems
8. UI-TARS-desktop
The Open-Source Multimodal AI Agent Stack: Connecting Cutting-Edge AI Models and Agent Infra
What sets it apart: Open-source stack combining multimodal GUI agents with vision and extensive MCP tool integration for human-like task completion.
Best for: multimodal agent development; GUI automation tasks; browser/computer control automation
FAQ
- What are the best alternatives to AstrBot?
- The closest open-source alternatives to AstrBot are LangBot, NanoClaw and QwenPaw, followed by nanobot, Open Assistant API and coze-studio. They are ranked by how closely they match what AstrBot does.
- Which AstrBot alternative is the most popular?
- nanobot has the most GitHub stars among AstrBot alternatives, with 48,747 stars.
- Which AstrBot alternative is the most actively maintained?
- By recent activity, nanobot (1,380 commits in the last 90 days) is the most actively developed alternative.