Time Machine is not available for Windows but there are plenty of alternatives that runs on Windows with similar functionality. The best open source Windows alternative is Duplicati. If that doesn't suit you, our users have ranked more than 50 alternatives to Time Machine and 12 are open source and available for Windows so hopefully you can find a suitable replacement. Other interesting open source Windows alternatives to Time Machine are Restic, UrBackup, Duplicacy and rdiff-backup.
Duplicati stores encrypted, incremental backups with AES-256 encryption and GPG, compatible with Windows, Linux, MacOS. Supports cloud services like OneDrive, Google Drive, and includes a built-in scheduler, auto-updater. Run backups through a web interface or command line.
restic is a program that does backups right. The design goals are: Easy, Fast, Verifiable, Secure, Efficient, Free.
UrBackup is a open source client/server backup system, that through a combination of image and file backups accomplishes both data safety and a fast restoration time.
Duplicacy is a new generation local and cloud backup tool that supports cross-computer deduplication. It is free for personal use and source code is available to commercial users.
rdiff-backup backs up one directory to another, possibly over a network. The target directory ends up a copy of the source directory, but extra reverse diffs are stored in a special subdirectory of that target directory, so you can still recover files lost some time ago.
Rustic is a backup tool that provides fast, encrypted, deduplicated backups written in Rust. It reads and writes the restic repo format described in the design document and can be used as a restic replacement in most cases.
BmuS is a powerful free backup program for the automated backup of files, directories, and MySQL databases from a Linux, Mac, Windows system to a NAS or network drive or from a NAS to another NAS. It features a dashboard, encryption, cloud backup deduplication, and much more. Docker ready.
snaprunner is a wrapper script in Python which adds some functionality to Drive SnapShot. It's an open source command line script and can be used and extended by anyone.
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Only backs up the changes instead of the whole file, just like Time Machine.