Horde is described as 'Groupware is a free, enterprise ready, browser based collaboration suite. Users can manage and share calendars, contacts, tasks and notes with the standards compliant components from the Horde Project' and is an app in the Online Services category. There are more than 25 alternatives to Horde for a variety of platforms, including Online / Web-based, Linux, Self-Hosted solutions, Android and iPhone. The best alternative is Gmail, which is free. Other great apps like Horde are Roundcube (Free, Open Source), Zoho Mail (Freemium), Rainloop (Free, Open Source) and Mailpile (Free, Open Source).
Roundcube webmail is a browser-based multilingual IMAP client with an application-like user interface. It provides full functionality you expect from an e-mail client, including MIME support, address book, folder manipulation, message searching and spell checking.
Zoho Mail is a webmail service built with the needs of a modern business in mind. It provides features for business users to communicate effectively while catering to the customization and mailbox management needs of IT administrators.
Simple, modern & fast web-based email client. Modest system requirements, decent performance, simple installation and upgrade, no database required. All these make RainLoop Webmail a perfect choice for your email solution.
Mailpile is a modern, fast web-mail client with user-friendly encryption and privacy features. The development of Mailpile is funded by a large community of backers and all code related to the project is and will be released under an OSI approved Free Software license.
A mail service which meets all needs - For individuals: free or Premium (1€/month) Mailo accounts - For children: a free and 100% secure address with a recreational and advertising-free interface - For families: an account for each member, a family domain name and a...
Zimbra Collaboration is an open, secure collaboration tool for email, calendaring, tasks and more. With the most innovative web application available today, Zimbra boosts the productivity of users on any desktop and dramatically reduces TCO compared to legacy platform vendors.
Zimbra Collaboration Suite vs Horde opinions
pros, cons and recent comments
sondrak Similar scope of groupware functionality, including calendar, tasks, etc.