The best free alternative to RaiDrive is Cyberduck, which is also Open Source. If that doesn't suit you, our users have ranked more than 25 alternatives to RaiDrive and many of them is free so hopefully you can find a suitable replacement. Other interesting free alternatives to RaiDrive are Rclone (Free, Open Source), Air Explorer (Freemium), odrive (Freemium) and Koofr (Freemium).
Easily connect to any S3 compatible storage service (Amazon S3, Wasabi, DigitalOcean, etc) via a local virtual drive. Browse and interact with your remote files without having to upload and download them.