Authkey.io

Authkey.io is a multichannel API platform enabling businesses to use channels simultaneously to connect via one API. It offers API for Bulk SMS, Event Based Messages, OTP Deliveries, Voice, Email, Authentication via multiple channels and WhatsApp.

SMS API Allows businesses to send SMS notifications, alerts, transactional messages, marketing campaigns, and more.

Voice API offers businesses the ability to deliver automated voice messages, Voice broadcast, IVR, missed call services, click to call, toll-free number, and voice-based customer support solutions.

Email API enables businesses to send transactional and marketing emails with built-in Email validator seamlessly. With HTML content support, attachment capabilities, and customizable templates.

WhatsApp Business API allows sending messaging on the most popular WhatsApp messaging platform. Through the API, businesses can send personalized messages, notifications, and updates, as well as receive responses from customers.