Software Alternatives, Accelerators & Startups


Horde Groupware is a free, enterprise ready, browser based collaboration suite.

Horde Alternatives

The best Horde alternatives based on verified products, community votes, reviews and other factors.
Latest update:

  1. 53

    Web-based IMAP email client

    Open Source

  2. 51

    Email at its best, new from Basecamp.

    paid Free Trial $99.0 / Annually

  3. VoIPstudio is an award-winning VoIP system that offers businesses of all sizes a scalable communication solution. It’s inexpensive, easy-to-use, offers a full suite of PBX features, and is fully integrated for CRM.

    Try for free paid Free Trial $4.99 / Monthly (User)

    Try for free
  4. 49

    Mailo is an email client where you can send and receive emails to and from anyone with an email address.

  5. 48

    Mailpile is a modern, fast web-mail client with user-friendly encryption and privacy features.

    Open Source

  6. 50

    Disposable email address application.

  7. 57

    RainLoop is a web based email client.

    Open Source

  8. 50

    All your E-mail, from all your accounts, in one place. Cypht is like a news reader, but for E-mail.

    Open Source

  9. 46

    Soverin is the honest email service that doesn’t sell your data.

  10. 53

    Save time and scale faster with accessible, secure, and reliable cloud email services. A proven multitenant email solution for telcos and service providers.

    freemium $1.3 / Monthly (Per mailbox)

  11. 41

    Webmail service. Powered by RainLoop.

  12. 37

    Zimbra is trusted by over 500 million users to increase productivity with a complete set of collaboration tools while maintaining total control over security and privacy.

  13. 29

    A fully fledged, free email server solution, an open source project (GPL v2).

    Open Source

  14. 40

    Self-hosted server for the ProtonMail client.

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