B47zip

: The native 7z format uses the BCJ2 coder for executable files, which significantly improves compression ratios for .exe files by using four separate pack streams.

: 7-Zip provides strong AES-256 encryption for both data and file names in its 7z format, making it more secure for personal storage than standard ZIP. Does 7z compress better than zip? - Microsoft Community Hub B47zip

: This feature allows 7-Zip to treat multiple files as a single continuous data block, leading to much higher compression ratios than standard ZIP. Note that in solid blocks, individual file "packed sizes" are often displayed as zero because they are part of one large compressed unit. : The native 7z format uses the BCJ2