privacyguides.org/_includes/sections/cloud-storage.html

<h1 id="cloud" class="anchor"><a href="#cloud"><i class="fas fa-link anchor-icon"></i></a> Encrypted Cloud Storage Services</h1>

<div class="alert alert-warning" role="alert">
  <strong>If you are currently using Cloud Storage Services like Dropbox, Google Drive, Microsoft OneDrive or Apple iCloud, you should pick an alternative here.</strong>
</div>

<div class="row mb-4">

  {% include card.html color="success"
  title="Nextcloud - Choose your hoster"
  image="assets/img/provider/Nextcloud.png"

  description="Similar functionally to the widely used Dropbox, with the difference being that Nextcloud is free and open-source, and thereby allowing anyone to install and operate it without charge on a private server, with no limits on storage space or the number of connected clients."

  url="https://nextcloud.com/"
  footer="Client OS: Windows, macOS, Linux, BSD, Unix, iOS, Android, Fire OS. Server: Linux."
  %}

  {% include card.html color="primary"
  title="Least Authority S4 - For Experts"
  image="assets/img/provider/S4.jpg"

  description="S4 (Simple Secure Storage Service) is Least Authority's verifiably secure off-site backup system for individuals and businesses. 100% client-side encryption and open source transparency. 250GB for $9.95/month or 5TB for $25.95/month. Servers are hosted with Amazon S3 in the US."

  url="https://leastauthority.com/"
  footer='OS: <a href="https://tahoe-lafs.org/trac/tahoe-lafs/wiki/Installation">Linux</a>, <a href="https://tahoe-lafs.org/trac/tahoe-lafs/wiki/AdvancedInstall"> Windows, macOS, OpenSolaris, BSD.</a> (Installation for advanced users)'
  %}

</div>

<h3>Worth Mentioning</h3>

<ul>
  <li><a href="https://cryptomator.org/">Cryptomator</a> - Free client-side AES encryption for your cloud files. Open source software: No backdoors, no registration.</li>
  <li><a href="https://cryptpad.fr">CryptPad</a> - Free and end-to-end encrypted real time collaboration sharing folders, media, and documents.</li>
</ul>