| B1 Free Archiver | Compress PST Pro | Compress PST Size | Utility to Compress PST Files | |
| 1.7.120 | 1.0 | 2.2 | 2.2 | |
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| Freeware | Shareware | Shareware | Shareware | Licence |
| FREE | $49.00 | $49.00 | $69.00 | Price |
| 0.65 MB | 2.10 MB | 2.37 MB | 1.30 MB | File size |
| Jan 3, 2022 | May 9, 2016 | Nov 11, 2011 | Oct 16, 2013 | Update |
| 20 | 20 | 16 | 27 | Downloads |
| Windows XP, Windows Vista, Windows Vista x64, Windows 7, Windows 7 x64, Windows 8, Windows 8 x64 | Win2000, Windows 7 x32, Windows 7 x 64, Win Server, Win Vista, Win Vista x64, Win XP and Win8 | Win2000, Windows 7 x32, Windows 7 x64, WinOther, WinServer, Windows Vista, Windows Vista x64, Windows XP | Win2000, Windows 7 x32, Windows 7 x64, WinOther, WinServer, Windows Vista, Windows Vista x64, Windows XP, Other | OS |
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