Top Open Source AI Chat Interfaces Tools in 2026
A curated collection of the 40 best free and open-source AI Chat Interfaces tools in 2026. Compare features, GitHub stars, tech stacks, and self-hosted software.
Zola
Open chat interface for all your AI models
Stars1,531Last commit8mo agoLicenseApache-2.0
Synara
Local-first workspace for parallel coding agents
Stars1,608Last commit17d agoLicenseMITParlant
A conversational AI server that manages agent behavior through context-aware guidelines, keeping responses consistent, auditable, and aligned at scale.
Stars18,269Last commit1mo agoLicenseApache-2.0
GPT4All
Run open-source AI models locally on your device
Stars77,395Last commit15mo agoLicenseMIT
Inbox Zero
AI email assistant to reach inbox zero fast
Stars12,094Last commit11d agoLicenseOpen SourceContentport
AI-powered Twitter content engine for growing accounts
Stars764Last commit8mo agoLicenseAGPL-3.0ByteChef
Open-source workflow & AI agent builder
Stars992Last commit10d agoLicenseOpen Source
Activeloop
Continual Learning Infrastructure for AI Agents
Stars9,228Last commit3mo agoLicenseApache-2.0
Typebot
No-code chatbot builder for websites & WhatsApp
Stars10,291Last commit13d agoLicenseOpen Source
Tiledesk
Open-source no-code AI chatbot platform
Stars14Last commit12d agoLicenseMIT
SAMA
Open source chat server for mobile and web apps
Stars158Last commit1mo agoLicenseGPL-3.0Rakazo
Open source Grok Bot alternative for persistent AI teammates
Stars1,379Last commit10d agoLicenseApache-2.0
Pullfrog
Open-source BYOK GitHub bot for code reviews
Stars1,078Last commit12d agoLicenseMIT
Proton Lumo
Privacy-first AI assistant from Proton
Stars5,562Last commit10d agoLicenseGPL-3.0
Open WebUI
Self-hosted AI platform for complete control
Stars150,082Last commit12d agoLicenseOpen Source
