Open-source voice AI platform you can self-host — a visual workflow builder, bring-your-own STT/LLM/TTS models, telephony, and no per-minute platform lock-in.
Audio & VoiceFreemium
Telephony
Places and answers real phone calls, wired into numbers, SMS and the phone network itself.
10 apps and 1 MCP server tagged Telephony.
Apps
A personal AI representative with its own phone number, inbox and computer that takes calls, works your email and runs tasks under rules you set.
Business & ProductivityFreemium
AI executive assistant for founders that schedules meetings, writes the follow-ups and even places phone calls - over SMS, email and Slack, with no new app to install.
Business & ProductivitySubscription
AI receptionist that answers every call and WhatsApp message for local service businesses, 24/7.
Automation & WorkflowsSubscription
Voice and text AI agents that run multi-week outbound calling campaigns for home-service businesses.
Marketing & SalesSubscription
A developer platform for voice agents that make and take phone calls, with sub-second turn latency.
Automation & WorkflowsFreemium
Build, test, and monitor production phone agents — with the testing and analytics that call centres actually require.
Automation & WorkflowsFreemium
Enterprise phone agents on self-hosted models, tuned for human-sounding delivery at very large call volumes.
Automation & WorkflowsSubscription
A B2B database of hundreds of millions of contacts plus the sequencing, dialling, and AI to work them.
Marketing & SalesFreemium
Developer platform for AI agents on Apple's own channels — programmable iMessage at scale, plus video agents that answer and place FaceTime calls in a few lines of code.
Audio & VoicePaid
MCP servers
Vapi's official MCP server for building voice agents — create assistants, place and schedule outbound phone calls, and manage phone numbers from your AI client.
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