21Online is a platform which holds a set of applications and tools especially designed to implement CENTURY 21 business model. When using 21Online you´ll have access to websites, internal and external channels of communication, apps mobile and a web application with working modules to help in daily routines. This platform was made for being used by CENTURY 21 professionals and also for CENTURY 21 customers, reason why you´ll find tools for each profile.


21Online provides exclusive websites whose goals are to promote CENTURY 21 brand by all means. We have the ambition to achive the whole...

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App's Mobile

We provide mobile applications (IOS and Android) for customers use and CENTURY 21 internal use. This app's were designed to satisfy...

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21Online gives access to a digital communication channel which reduces the distance between the Master and their franchisees called Intranet...

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Web Application

21Online desktop application guides you through CENTURY 21 business model and is specific for internal use. There is a set of tools designed...

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Who is using 21Online?

21Online is the real estate software used in more countries in the entire world by CENTURY 21. Right now countries such as Portugal, Spain, Colombia, Belize, Guatemala, Honduras, Nicaragua, Costa Rica, Panama and San Salvador are using our software in all different channels that we provide.

Our ambition is to spread 21Online to every sides of the globe.


We have a specialized team to provide support to all of our users in 3 diferent languages, such as english, portuguese and spanish.

Our helpdesk uses a ticket system to communicate to our customers and help them in every problem that occur by using the platform. It could be a technical problem or business related.

We are available in all working days.


21Online exists since 2014 and our technical team work together since the beginning and become specialized not only in the technical field as so in the CENTURY 21 Business Model. This plus makes the difference when it comes to development new features and understanding CENTURY 21 needs.

About our product, 21Online is a Software as a Service (SaaS) implemented in Microsoft Azure Cloud that was build with Microsoft technologies, such as:

  • Microsoft Visual Studio
  • Microsoft SQL Azure
  • Telerik Report
  • Microsoft .NET
  • Microsoft C#
  • Telerik Kendo UI
  • Microsoft ASP.NET MVC
  • Xamarin iOS/Android

Contact Us

If you want to learn more from us, please contact our Product Manager
Teresa Augusto.
+351 910 745 505

Logo Mix and Blend

MIX AND BLEND, is a software house and since 2014 specialized itself in product development in real estate business.

Our brand is part of CENTURY 21 Portugal and Spain, reason why we have so much knowledge about this business model.

Our goals are to achieve all the challenges that CENTURY 21 launches every day, to provide an excellent service to our customers and continuing to evolve 21Online universe.