Latest news, tips & tricks, customer cases, and in-depth technical posts

Learn how GatewayAPI combines global connectivity and local expertise to deliver reliable communications worldwide.

Learn more about how we strategically and specifically work to keep GatewayAPI + the SMS industry secure.

Learn how SMS-based surveys can help companies improve their customer experience and drive growth.

ONLINECITY.IO, GatewayAPI’s parent company, was founded 25 years ago. Read more about its history as well as the guiding principles that have shaped the company since its inception.

Find out about how Sender ID registration works in Finland as well as the other Nordic countries.

SMS communication in particular proved to be of great importance and was used for a variety of purposes such as notifying close contacts.

Learn about the key differences between a CPaaS and a UCaaS platform and dive deeper into the future of business communication technologies.

In this blog post, we will touch upon the benefits of WhatsApp as we see it and discuss how integrating WhatsApp into our suite of communication channels will provide you as a customer with new powerful communication capabilities.

Black Friday is the Olympian of retail events. Learn strategies to maximize your profits on the big shopping day via SMS marketing.

SMS marketing is one of the most effective and reliable ways to reach customers. Learn about five effective trends.

Use SMS appointment reminders to reduce no-shows, improve satisfaction and save money – the return on investment is huge! 

Learn more about how you can combine Slack with SMS technology to enable frictionless SMS support via Slack.

Learn more about all the benefits of implementing SMS technology in your SaaS business. Acquire a new recurring source of revenue.

At ONLINECITY.IO, the parent company of GatewayAPI, we take our responsibility seriously and strive to make the world a better place both locally and globally.

Explore the latest features of our sister platform RelationCity, and read more about the brand new and intuitive tools that make planning and sending SMS campaigns a breeze.

In this guide you can get an overview of a number of parameters that are good to keep in mind from the beginning when selecting an SMS gateway.

Read about the background for the large price increase on SMS traffic to Denmark, which the Danish telecom companies will implement on July 1, 2021.

We have put together a complete list with tips and ideas on how to get even more sales via SMS marketing on shopping-celebrations such as Black Friday, Cyber Monday, Singles’ Day etc.

By combining GatewayAPI with Integromat (Make), you can set up SMS automation between hundreds of services with no coding experience whatsoever.

Customer case with the Danish company, Minuba. Learn how they have benefitted from integrating our SMS services into their CRM platform.

Customer case with the digital law firm, NEMADVOKAT. Read about how SMS messages drastically improved their interaction rates.

As the title says: You can learn everything you need to know about virtual numbers and keywords for A2P SMS communication in this blog post.

The GatewayAPI Standard Class is suitable for most, whereas the Premium Class suits those who seek additional functionalities such as encryption.

Learn how to set up email to SMS and SMS to email in this guide, and get inspiration on how to use this technology for different purposes.

Customer case with the company Realkreditkonsulenten, where the company explains how they use GatewayAPI’s SMS services as an alternative to building an app.

Customer case with the world-renowned Roskilde Festival. Read about how the festival used SMS-technology to supplement their Roskilde Festival debit card.

Read our tips for ways to improve your customer satisfaction by using different SMS services. Included with a list of do’s and don’ts.

Read about our journey from upstart, to BETA to fully-developed with customers all over the world, sending millions of SMS messages every month.

Customer case with Blue Idea, whose service specialises in the distribution of critical internal and external information in a wide range of organisations.