Open Source Horde Alternatives

    The most popular alternative is Roundcube, which is both free and Open Source. If that doesn't suit you, our users have ranked 40 alternatives to Horde so hopefully you can find a suitable replacement. Other interesting Horde alternatives are Rainloop (Free, Open Source), Mailpile (Free, Open Source), mailcow: dockerized (Free, Open Source) and Zimbra Collaboration Suite (Freemium, Open Source).

    The list of alternatives was last updated Nov 23, 2020