Mailpile
Horde
Roundcube
Mailo
ProtonMail
Cypht
Rainloop
HEY
Kolab Now
ProtonMail
Tutanota
mailbox.org
Google Workspace
Runbox
Mailfence
Zimbra
Mailpile Kolab NowBased on our record, Kolab Now seems to be more popular. It has been mentiond 3 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Another compromise between self hosting and using "big tech" email providers is to use smaller email providers. I have been using https://kolabnow.com/ for a five years or so and am a happy customer. Of course it's more expensive, has less bells and whistles, etc, but I'm glad I don't have to participate in the surveillance capitalism machine of big email providers. - Source: Hacker News / over 1 year ago
BTW: KolabNow is at https://kolabnow.com . I have no connection to them aside from being a customer for many years. Source: over 2 years ago
Likewise, I expected kolab to appear in TFA's list of evaluated options, as I knew it has been around for a while and covered most (all?) of the author's requirements. IIRC it was a key element in Munich's initial 'let's move to GNU/Linux' project, so I imagined it had received a LOT of updates for those few years. The repo [0] looks like it's still getting lots of love. The commercial entity doing much of the... - Source: Hacker News / over 2 years ago
Horde - Horde Groupware is a free, enterprise ready, browser based collaboration suite.
ProtonMail - Secure email with absolutely no compromises. Get your free encrypted email account today.
Roundcube - Web-based IMAP email client
Tutanota - Get your encrypted mailbox for free.
Mailo - Mailo is an email client where you can send and receive emails to and from anyone with an email address.
mailbox.org - mailbox.org offers a secure e-mail account for home and business use. The domain name, me@mailbox.