zpaq is described as 'Free and open source incremental, journaling command-line archiver for Windows, Linux and Mac OS/X' and is a File Archiver in the backup & sync category. There are more than 25 alternatives to zpaq for a variety of platforms, including Windows, Linux, Mac, Android and BSD apps. The best zpaq alternative is 7-Zip, which is both free and Open Source. Other great apps like zpaq are PeaZip, WinRAR, NanaZip and Restic.
Feature-rich archiving software with top-tier compression in 7z, integration in Windows Shell, AES-256 encryption, and multi-format support, including TAR, ZIP, RAR. Offers strong file management tools and a command line version for Linux/Unix systems.
PeaZip is free file archiver utility, based on Open Source technologies of 7-Zip, p7zip, FreeArc, PAQ, and PEA projects, for Linux, macOS and Windows.
Powerful file compression and archiving tool supporting numerous formats. Offers secure file transfer, efficient storage, cross-platform compatibility, and multi-language support.
NanaZip is an open source file archiver intended for the modern Windows experience, forked from the source code of well-known open source file archiver 7-Zip.
restic is a program that does backups right. The design goals are: Easy, Fast, Verifiable, Secure, Efficient, Free.
Kopia is a fast and secure open-source backup/restore tool that manages filesystem snapshots in a remote storage. It features client-side encryption, compression, backup policies. command-line interface and more.
FreeArc is a free and open source file archiver developed by Bulat Ziganshin. It uses LZMA, PPMD, TrueAudio and GRzip algorithms with automatic switching by file type, and also uses set of filters—for instance it can remove repetitions from text.
7-Zip with support for Zstandard, Brotli, Lz4, Lz5 and Lizard Compression. Open source under LGPL-2.1 license.
Universal Viewer is an advanced file viewer for wide range of formats. Supported file formats are:
B1 Free Archiver is a free multi-platform universal archiver. Currently it works on Windows, Mac, Linux and Android; moreover B1 Online Archiver allows you to uncompress .b1, zip, rar or .7z archive from your computer directly online.
Explzh for Windows is a file operation tool created with the concept of treating archive files, CD-ROM virtual disk images (ISO-9660 / ISO-13346), and FTP hosts as virtual folders and handling them like an explorer.
Russia
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7zip is faster but it does not allow versioning/incremental compression.