ALZip vs B1 Archiver

ALZip is a file compression and extraction program published by ESTsoft. It handles about 40 formats, including ALZ, EGG, ZIP, LZH, TAR, and JAR, and can extract split ALZ, EGG, ZIP, RAR, and ACE archives. Listed features include encryption, split archives, command-line tools, multithreaded ZIP compression, solid and split EGG archives, and Unicode compression. In icon view, users can preview image thumbnails without extracting an archive; linked image viewing requires installing ALSee. ALZip can warn when an archive contains a suspected malicious file and extract it to a safe folder. The PC version can use ALYac to scan compressed files for risks. The product page recommends Windows 11 and 10 for PC and describes a Linux version with similar functions; an Android app is also linked. ESTsoft claims extraction speed can increase by up to 700%, with results depending on format, PC, and environment. The Personal plan costs nothing for qualifying domestic individual users using it noncommercially. Business, education, and public-sector licenses are sold separately, with prices available through the business shopping mall.

B1 Free Archiver creates and extracts archives, with desktop software, an Android app and an online archiver. The desktop application creates B1 and ZIP archives and supports almost 40 formats, including RAR, RAR5 and 7z. The online tool extracts files from B1, ZIP, RAR, 7z and other archive types. On Android, B1 also works as a file manager. The B1 format supports password protection using 256-bit AES encryption, and the desktop archiver checks archive integrity with Adler-32 before unpacking. B1 says files uploaded to its online archiver are deleted a few minutes after the page is closed. Its privacy policy says it does not knowingly collect identifying personal data, though it may collect non-personally identifiable server information such as IP address and browser type. The policy also says app and device usage data, including location and network performance, may be collected for anonymous ad-related use in B1 apps. Support is by email and in English only. B1 is free for personal and commercial use, with no registration.