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.
Structured control layer for customer-facing AI agents
Stars
18,284Last commit
2 months agoLicense
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:
Create powerful chatbots without coding
Stars
10,315Last commit
15 hours agoLicense
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
5,618Last commit
21 hours agoLicense
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:
Markdown that mounts real applications
Stars
67Last commit
1 month agoLicense
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
14Last commit
2 days agoLicense
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:
Sent – Messaging Infrastructure for Developers. One API for SMS, WhatsApp, and RCS across 190+ countries.
Sent