Recently I've been considering switching away from Proton, but...

This page summarizes the projects mentioned and recommended in the original post on /r/ProtonMail

Civic Auth - Auth in Less Than 5 Minutes
Civic Auth comes with multiple SSO options, optional embedded wallets, and user management — all implemented with just a few lines of code. Start building today.
www.civic.com
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  1. Mailu

    Insular email distribution - mail server as Docker images

    While hosting mail isn't easy, Mailu and similar projects make it way easier than it used to be.

  2. Civic Auth

    Auth in Less Than 5 Minutes. Civic Auth comes with multiple SSO options, optional embedded wallets, and user management — all implemented with just a few lines of code. Start building today.

    Civic Auth logo
  3. Mailcow

    mailcow: dockerized - 🐮 + 🐋 = 💕

    Or, you can keep your VPS running 24/7, with mailcow.email for your emails, immich.app for your photos, nextcloud for your calendar and contacts. Use a second SMTP relay as a backup, they will receive your emails if your main SMTP is down for more than one week, which is the procedure.

  4. immich

    High performance self-hosted photo and video management solution.

    Or, you can keep your VPS running 24/7, with mailcow.email for your emails, immich.app for your photos, nextcloud for your calendar and contacts. Use a second SMTP relay as a backup, they will receive your emails if your main SMTP is down for more than one week, which is the procedure.

  5. skiff-apps

    Privacy-first, end-to-end encrypted Mail, Pages, Drive, and Calendar.

    If you don't want to use a custom domain it's $3. There is also skiff.com which is an encrypted email provider + more. But I find their apps to be a bit slower and not as fully featured as fastmail but hey at $3 a month it might be something you're looking for.

NOTE: The number of mentions on this list indicates mentions on common posts plus user suggested alternatives. Hence, a higher number means a more popular project.

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