Open-source realtime media infrastructure with the Agents framework, SIP, and phone numbers
Email API for developers with React Email, batch sending, and an official MCP server | 5/5 |
Free bot API with instant programmatic token issuance and webhooks | 5/5 |
Voice agent platform handling telephony, turn-taking, interruptions, and warm transfers | 5/5 |
Bot API with gateway events, slash commands, and webhooks | 4/5 |
SMS, voice, WhatsApp, and verification APIs, with an official MCP server over the platform | 4/5 |
Notification infrastructure API — workflows, preferences, and multi-channel delivery for agent output | 4/5 |