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Open Source Chatbot Platforms using CSS

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. using CSS.

Parlant

AI
Structured control layer for customer-facing AI agents

  • Stars

    18,307

  • Last commit

    6 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:

Voiceflow

Typebot

Create powerful chatbots without coding

  • Stars

    10,561

  • 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:

Manychat

Dograh

AI
Self-hostable voice agent platform with full model control

  • Stars

    Stars growing over the last 30 days5,909

  • Last commit

    8 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:

Voiceflow

ChatbotX

AI
Self-hostable omnichannel chatbot platform for agencies

  • Stars

    Stars growing quickly over the last 30 days980

  • 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:

Manychat

MDMA

Markdown that mounts real applications

  • Stars

    71

  • Last commit

    7 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:

Streamlit

Tiledesk

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

  • Stars

    15

  • Last commit

    22 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:

Intercom
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