Why Choose Esendex’s SMS Gateway?

We strive to be the best SMS gateway in the industry. Our trusted text gateway provides quality performance to drive your communication strategy. From integration to your first SMS campaign, we make the entire process uncomplicated.


1. World Class Support

Most gateway SMS services don't have active online support channels customers can speak to when they need it the most, and we understand. That's why we have 24/7, around the clock emergency support for our SMS gateway API service.

  • Fast Response Times
  • Fast Troubleshooting
  • Chat, Email, & Phone Support
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2. Global SMS Gateway API

Our bulk SMS gateway enables you to leverage your business communication globally without any interruptions. Don't worry about the distance! Get connectivity in more than 190 countries.

  • Tier 1 SMS Network
  • 99.9% Guaranteed Uptime

3. Government Level Security

Our gateway bulk SMS is 256 Bit Encrypted (typically only reserved for governments and militaries), SOC2 Type 2 Certified, HITRUST Certified. Hardware-based SMS servers are strategically located throughout the US-owned and operated by Esendex.

  • 256 Bit Encrypted
  • HITRUST Certified
  • SOC2 Certified
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What are SMS Gateways?

An SMS gateway is a service that allows businesses to send and receive SMS & MMS. Businesses use them to send notifications, alerts, or other important information. SMS gateways are very versatile and can be used for various purposes. They are perfect for sending out mass texts or sending individual texts to a large group of people.

I Still Don't Understand

No worries! SMS gateways can be a tricky subject. Let's delve into an example that might be easier for you to understand. You see a person wearing a cool hat, and you want to know where they got it from. But when you ask, you learn that they only speak French, while you only speak English. Thankfully, the friend you're with speaks both languages and can translate your message. In this example, you and the other person are different protocols, while your translator friend is an SMS gateway.

What Does This Have to do with SMS Notify! API?

But wait, you ask— this is all about SMS gateways, and you clicked on the product page for an SMS API. Well, Esendex is an SMS gateway provider, and our SMS Notify! API includes all the functions of an SMS gateway for your convenience (with some extra features included).

Why the Different Name?

A rose by any other name smells just as sweet, and the same is true for an API… sort of. Okay, we're not Shakespeare, but cut us some slack. Poems aren't our thing, but we have been offering superior SMS services since 1999. And just like how an SMS gateway translates messages for different protocols, an API allows different applications to talk to each other. We expose an easy-to-use API for you to use that incorporates SMS gateway functions so that your messages are always delivered successfully.

How Does Esendex's SMS Gateway Work?

With Esendex's SMS gateway, you can send text messages from your website or application to over 200 countries across the globe. But we also know you want to send pictures from your latest vacation, so we made sure you can do that, too. Esendex's SMS gateway also supports MMS messages across the U.S. How? Let us explain.

The Long and Short of It

No, we're not talking long and short codes— we're talking about our SMS gateway API, although our API does use those. The simple explanation is that our SMS API uses the DIDs or short codes assigned to your account license key to send MT and MMS messages and receive MO and MMS messages.

Want more detail?

We're happy to provide it. Here's a more in-depth explanation for how our SMS API works:

  1. Your server or application makes an Esendex SMS Notify! API request.
  2. Esendex replies with an API response.
  3. Esendex sends your message to the appropriate aggregator.
  4. The aggregator delivers your message to the appropriate carrier.
  5. The carrier acknowledges receipt of your message (short codes only).
  6. The carrier delivers your message to the intended recipient's cell phone.

That's a lot of acronyms…

DID- a 10-digit SMS-enabled phone number used for low volume two-way texting; also called a long code.

Short code- a five or six-digit phone number used for mass texting.

MO- mobile originated; a text message that originated from a mobile device; an incoming SMS message.

MT- mobile terminated; a text message that terminates on a mobile device; an outgoing SMS message.

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Simple SMS Gateway Documentation

We know that implementing an SMS gateway service into your business takes time. That's why we made our documentation easy to understand and implement into all of your projects!

You'll have no problem connecting with the SMS gateway API using any programming language capable of REST or SOAP calls, as it was created by developers who wanted nothing more than making sure you could get up and running quickly without having trouble understanding what is happening or how things work underneath the hood.

Build Your Apps Faster

  • Uncomplicated API References
  • Code in Multiple Programming Languages
  • Technical Customer Support
  • Helpful FAQ Section for Dev

The Esendex Difference

Since the early 2000s, Esendex's been one of the industry's most trusted SMS gateway providers.

The truth is we do things differently. Our vision is to shape your connections to the world through reliable, usable, and adaptable Communication and Data APIs.

24/7 Support Lowest Pricing Multiple Service Channels

What Our Customers Have to Say

We’ve been rated 5 out 5 stars on Capterra, GetApp, Google and Facebook – based on 40+ reviews.

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Popular SMS API Use Cases

With our easy-to use SMS service API, you can programmatically add SMS campaigns or set up autoresponders with just a few lines of code.

Send discounts & offers that advertise your products and services to push subscribers to become customers.

Example: Want to give the love of your life a special Valentine’s Day gift? For 24 hours, our VIP text subscribers can get 15% off all flowers. Your significant other awaits you: https://yourwebsite.com

Learn what your customers think about your products, services, and company as a whole to resolve their issues and improve business.

Example: Hi Jerome, you recently bought your new cellphone, can you tell us how often you’re using it? Your feedback is very important to us. Cheers, ABC Mobile.

Entice your customers with opportunities to win prizes and discounts on your products and services.

Example: Thanks for entering for a chance to win a FREE 60 minute massage!

Easily send time-sensitive alerts to your customers to let them know about important events like fraud, weather alerts, company updates and so much more.

Example: Please take shelter. Lock your doors and windows. A category 3 hurricane is headed towards your location in Chesapeake, VA around 1:00pm EST. Await further info. Check https://123weather.com for more info.

Put an end to no-shows by sending scheduled text messages to be sent before both parties meet.

Example: Hi Matthew. Your dental appointment at 123 Teeth is on 2/18/2022 at 3:00pm. Reply C to confirm or stop to end all text messages.

A cellphone that has text messages displayed on its screen that came from an sms api

Explore Our SMS API Blog Topics

The Esendex blog has the latest content for all of your SMS API needs.

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It’s Easy To Get Started

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