The best Cloud Storage alternative to Rclone is Cryptomator, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to Rclone and many of them are Cloud Storage Services so hopefully you can find a suitable replacement. Other interesting Cloud Storage Service alternatives to Rclone are Cyberduck, Koofr, Air Explorer and CarotDAV.
Cryptomator provides transparent, client-side encryption for your cloud. Protect your documents from unauthorized access. Cryptomator is free and open source software, so you can rest assured there are no backdoors.
A libre FTP, SFTP, WebDAV, S3, Backblaze B2, Azure & OpenStack Swift browser.
Koofr is a safe, secure and simple way to store, backup and share your documents, photos, videos and more. It offers up to 10 GB of free safe storage for your files with affordable upgrades and options to connect multiple cloud accounts.
Air Explorer is an application that manages easily all your files in cloud servers (Google Drive, OneDrive, Dropbox, Mega, Box, Mediafire, WebDAV, Copy, Yandex,...) and FTP and SFTP services.
CarotDAV is a Simple WebDAV / FTP / SkyDrive / DropBox / GoogleDrive / Box / SugarSync client for Windows OS, available free of charge. It is also able to read GoogleDocs or IMAP.
Centralize management of numerous cloud accounts in a single platform, transfer data directly between services such as Dropbox, OneDrive, Google Drive, and FTP, automate transfers with scheduling, organize files using unified login, and track transfer history securely.
Insync is a Google Drive sync and backup client with multiple account support.
CloudMounter is a must-have tool for Mac and Windows users. You can easily mount most popular clouds as disks without having to download online files on the hard drive. As well as secure cloud files with data encryption.
RcloneView is a cross-platform GUI that unlocks the full potential of the Rclone CLI tool—without requiring any command-line use. Designed for seamless cloud file management, it empowers users to:
Put the cloud on your desktop; access Amazon S3, Dropbox, Google Drive, OneDrive and more. WebDrive lets you edit files on corporate SFTP and SharePoint Servers as easily as editing any file on your computer.
Germany
EU
Switzerland
Slovenia
Japan
China
Singapore
United States
South Korea
You don't actually need nothing like Cryptomator if you (know how to) use rclone: itself have "crypt" type of "remote", that is able to seamlessly encrypt/decrypt any file locally or in any compatible cloud service. Both are software with different purposes, to be fair (but, well, rclone is way more complete, in a different approach/for more advanced CLI users etc).