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Send SMS, Voice and Email parallelly using API integration | High Volume APIs Built for Sending huge volume. Try the Free Emails platform.

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Authkey is a One API Platform for SMS, Voice & E-mail which allows you to verify and keep you connected with your Clients or End Users. It has been developed keeping in mind that in most of the cases like Sending OTPs, Notifications, Order Confirmation, Timely Offers, Newsletter etc. We need to communicate through multiple channels i.e. Voice, SMS or Emails. So why not perform the task from the same platform built specifically for high volume?

What can you do with Authkey?

Parallel Sending - Send SMS, Voice and Email Simultaneously from the same source for different purposes like SMS & Email for Order Confirmation and Voice for COD Verification.

Custom Fallback - Apply Custom Fallback and be assured not to miss a single msg to be conveyed like OTPs or any other Critical Information to your Users. So that one channel fails, the other channel does the job.

Web hook API - Simple Web hook API Integration to make you aware of what's happening around.

You can send SMS, Voice and Email with our Direct APIs and start in a jiffy. You can create Customized Templates for sending customized messages and take inputs like Keypress in Voice. Event Based Sending to send different messages in SMS, Voice and Email for a particular Event. You can add Fallback to any of the above mentioned scenarios.

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The best alternatives based on verified products, community votes, reviews and other factors.
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  1. Kaleyra is a platform that helps developers to build SMS and voice messaging applications for a global scale.

  2. Twilio SendGrid Email API is a conversation platform that consists of the module, which enhances your communication strategies and interacts with consumers to get their response and improve your business quality.

  3. Whappext is an online marketing platform that helps users to send bulk messages to millions of users for the marketing of their brands.

  4. WAAM-it Sender is a WhatsApp marketing software that enables users to send messages from their system and smartphones anytime, anywhere.

  5. Viking Whatsapp Tools is a platform that helps businesses to sell on WhatsApp and build an effective sales strategy.

  6. Twilio’s Voice API extends your app’s communications to add flexible call center features, soft phones, call tracking, interactive voice response (IVR) menus and more.

  7. Bulksmsplans is a platform that offers bulk SMS marketing and alert plans to brands and users.

  8. Send and receive text messages globally with Twilio SMS.

  9. WebXion Bulk SMS is a service that enables users to send SMS to their audience and customers most effectively and efficiently.

  10. Exotel is a powerful, feature-rich business phone system that offers features like Smart IVR for your business.

  11. Q Sender is a platform that offers the best marketing tools to help the business grow their sales and increase their audience.

  12. GupShup provides a scalable and reliable cloud messaging platform.

  13. WhatsApp Messenger: More than 1 billion people in over 180 countries use WhatsApp to stay in touch with friends and family, anytime and anywhere.


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  1. User avatar
    Good customer support

    These guys are really fast with providing customer support and onboarding. Must try for startups

    👍 Pros:    Good customer support
    👎 Cons:    No sub users creation option

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Author of's details: | Publisher: SaaSHub
Categories: Communication, Cloud Communications, Voice And SMS, Voice And Messaging API, API Tools, Email API, Email Validator, Two Factor Authentication, Transactional Email