Intelligent API from the messaging experts

Integrate once and you’re ready to deliver the best messaging solution for your customers and business.

Woman smiling at her phone, showing pleasure at the intuitiveness of the messaging API
Trusted by industry leaders to deliver world class mobile messaging solutions

One API for SMS, WhatsApp and RCS messages

Reliable, scalable, lightweight APIs brought to you from the business messaging experts. At Esendex, we have 20+ years of experience in understanding complex business challenges and helping organisations find innovative ways to integrate SMS, WhatsApp or RCS messaging into their existing software.

From delivery notifications and appointment reminders to marketing alerts, we can boost the speed, quality and delivery of your services by helping you automate your messaging.
One connection for a world of seamless communication.

Why choose our API?

Fast, reliable message delivery

Our direct connections to all major networks ensures secure message delivery to both local and international customers, via the fastest and highest quality routes available.

Multichannel, global, scalable messaging

Send messages automatically to any country in seconds. Choose from SMS, WhatsApp or RCS messaging options, from a provider that sends billions of messages per year.

Robust, dependable connectivity

Be confident that your time critical messages will always be sent. Our APIs and messaging platform consistently achieve an up time of 99.99% availability.

Easy, quick integration

Be equipped to send and receive messages in minutes.

Our swagger formatted developers’ documentation will help guide you through how to implement our APIs seamlessly into your website or application.

Local support with a global reach

Access all the benefits of a global provider with the personal touch of expert local support. Have access to a dedicated account manager, the ability to speak to someone round-the-clock and more.

End-to-end data and security protection

Our ISO 27001 accreditation and usage of the most secure communication protocols (TLS 1.2) shows our commitment to protecting our customers’ data. We do not use grey routes.

Our APIs are served using HTTPs to ensure data privacy.

Our key features

Send personalised and customised messages to single or multiple contacts.

Retrieve inbound messages.

Create and save SMS templates with dynamic fields that can be personalised  to each recipient.

Be confident your messages have arrived by easily seeing the status of your messages and their send/delivery success.

For WhatsApp and RCS messages, you can also review click and read rates.

In addition to tracking message delivery status and engagement metrics, you can add metadata to sent messages (e.g. campaign code or details specific to each recipient).

This means you can segment data, making it easier to report on responses from different types of customers.

Quickly and easily retrieve the number of message credits you have remaining for each of your accounts and channels. 

With our API, you can view balance information all in one place.

Developer? Come and play with our API.

We help build experiences, not just software

Our messaging API makes it easy for you to forge stronger connections with your customers, using a single platform. One API is all you need. Here’s how we’ve helped other businesses…

Spotler improves customer engagement when they add SMS via Esendex

B2B marketing automation software provider Spotler wanted to add SMS as an additional comms channel to their platform. A partnership with Esendex has given Spotler the chance to send SMS alongside their existing email strategy to end customers, improving engagement and experience.

Capgemini deploys a robust click-and-collection solution, thanks to Esendex’s SMS API

Approached by a major high street retailer to launch their new click-and-collect service, Capgemini chose our SMS API to help. Since implementing this automation, their end customer’s ecommerce division has increased.

Better customer conversations at your fingertips

Activate your free trial, get your API key and see how easy it is to integrate today.