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Open Source Chatbot Platforms

A curated collection of the best open source tools to build, deploy, and manage AI-powered conversational agents across various channels, automating customer interactions and support services..

Structured control layer for customer-facing AI agents
  • Stars

    18,306
  • Last commit

    10 hours ago
  • License

    Apache-2.0
A conversational AI server that manages agent behavior through context-aware guidelines, keeping responses consistent, auditable, and aligned at scale.

Open Source Alternative to:

Full-stack platform for voice, video, and physical AI agents
  • Stars

    Stars growing over the last 30 days21,743
  • Last commit

    11 hours ago
  • License

    Apache-2.0
Build, test, deploy, and scale voice and video AI agents with an open source framework, inference gateway, telephony integrations, and full observability.

Open Source Alternative to:

Build powerful AI agents with cutting-edge LLM technology
  • Stars

    14,964
  • Last commit

    3 hours ago
  • License

    MIT
A comprehensive platform for creating AI agents with intuitive tools, extensive integrations, and enterprise-grade features powered by the latest language models.

Open Source Alternative to:

Create powerful chatbots without coding
  • Stars

    10,575
  • Last commit

    1 day ago
  • License

    Unknown
Design, build, and deploy interactive chatbots with a visual editor. Integrate easily and collect data effortlessly.

Open Source Alternative to:

Self-hostable voice agent platform with full model control
  • Stars

    Stars growing over the last 30 days5,933
  • Last commit

    3 hours ago
  • License

    BSD-2-Clause
Open-source voice agent platform that lets you plug in your own STT, LLM, and TTS models, deploy on-prem or in your VPC, and build agents via MCP or a visual workflow builder.

Open Source Alternative to:

Self-hostable omnichannel chatbot platform for agencies
  • Stars

    Stars growing quickly over the last 30 days989
  • Last commit

    6 hours ago
  • License

    MIT
Open source agentic chat marketing platform you can self-host, white-label, and resell. Automate omnichannel conversations across WhatsApp, Messenger, Instagram, Telegram, Zalo, TikTok, Email, and Webchat with a flow builder, shared inbox, AI agents, CRM, and broadcasts.

Open Source Alternative to:

Messaging SDK with AI agents for web, iOS, and Android
  • Stars

    551
  • Last commit

    5 hours ago
  • License

    Apache-2.0
Build branded chat apps with AI agents, group messaging, document exchange, and digital wallets using React and React Native components.

Open Source Alternative to:

Markdown that mounts real applications
  • Stars

    71
  • Last commit

    9 days ago
  • License

    MIT
Markdown Document with Mounted Applications, the open-source format that turns AI responses into interactive documents. Forms, tables, approval gates and charts render straight from the chat, no custom UI per use case.

Open Source Alternative to:

No-code platform to build AI agents and automate support
  • Stars

    15
  • Last commit

    5 hours ago
  • License

    MIT
Build AI chatbots, automate customer support workflows, and connect live agents across web, WhatsApp, email, and voice with a no-code visual designer.

Open Source Alternative to: