User Authentication API

  • Send and Verify users accounts with two-factor authentication
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Verify the true identity of
of your users in seconds

Hellio makes it seamlessly easy for application and mobile developers to integrate our Authentication API to help you register real users into your apps instead of bots and spammers.

Key Features

Global reach

Send SMS messages to customers in over 190 countries thanks to partnerships with over 800 mobile networks and hubs.

Backup Mechanism

You can configure emailing as backup or an alternative means of sending OTP code to your users with Hellio at no extra charges.

Adaptive routing

Your messages arrive fast thanks to smart routing algorithms which determine the quickest delivery or rerouting channels.

Top notch support

Get in touch with a real person when you have questions or need a hand. Included free with all of our services.

SMS campaign tools

Run targeted campaigns with tools like message preview, templates, scheduling, unsubscribe links and CRM integration.

Built to scale

Trust an easy to integrate, enterprise-grade API to handle any volume of messages your company needs ­as you grow.