Dograh is an open-source voice AI platform that serves as a self-hosted alternative to commercial services like Vapi and Retell. It provides a visual workflow builder for creating voice agents that integrate with LLMs, speech-to-text, and text-to-speech systems. The platform supports MCP (Model Context Protocol) natively, includes telephony capabilities for inbound and outbound calls, and can run entirely on-premises with no vendor lock-in.