Horde as a generic web application framework primarily supported the webmail as well as a set of groupware applications by the time Horde 3.0 was released in 2004. The modular and flexible nature of the software allowed many service providers and packagers to integrate the software into their portfolio. Horde is the software used for webmail offered by SAPO which serves several million users. The software has been packaged for all major Linux distributions and is available as a component in hosting tools such as Plesk or cPanel.