Open Source Alternatives to Nuntius (YC S25)
10 open source AI Communications Platform options similar to Nuntius (YC S25), ranked by named competitors first, sector overlap, and our 0-100 AI-readiness score. Every company listed publishes its source: each one carries an open source sector tag and a public GitHub repository.
Vocode50Open SourceSan Francisco, United States$3.3MOpen-source library for building hyper-realistic voice agents and conversational AI applications.
Open source · Self-hostable
Rasa49Conversational AIBerlin, Germany$13.0MOpen-source conversational AI platform for building custom chatbots and virtual assistants.
Open source · Self-hostable
Coqui48Voice AIBerlin, GermanyOpen-source AI models for voice synthesis, translation, and TTS.
Open source · Self-hostable
KiloClaw46Artificial IntelligenceA managed, private, and production-grade environment for OpenClaw, offering access to over 500 AI models and essential tools.
Open source · Self-hostable
cal.com41Scheduling SoftwareBerlin, GermanyOpen-source scheduling infrastructure for individuals, businesses, and developers.
Open source · Self-hostable
- GEGeniA6Agentic AI
Open-source AI platform engineering team member for production environments, automating tasks and learning tools.
Open source · Self-hostable
MCP.so10Developer ToolsA community-driven marketplace for discovering and deploying Model Context Protocol (MCP) servers and clients.
Open source · Self-hostable
RelAI49Agentic AISan Francisco, United States$6.9MAn open-source platform for building, simulating, evaluating, and optimizing reliable AI agents.
Open source · Self-hostable
Linuxed19Enterprise SoftwareLinuxed provides an AI-powered platform for Linux system administration, automation, and infrastructure management.
Open source · Self-hostable
Kyutai68Frontier AI LabParis, France$300.0MA non-profit AI research lab focused on open science and developing advanced multimodal and voice AI models.
Open source · Self-hostable