Cigati PST Compress Tool - 2026 Pricing, Features, Reviews & Alternatives

Cigati PST Compress Tool is a specialized application that reduces the size of Microsoft Outlook PST and Exchange OST files. It addresses challenges related to managing oversized mailbox files by enabling batch compression of single and multiple data files. The solution is designed for IT professionals and system administrators who require efficient storage optimization without compromising data integrity. It targets organizations that utilize Microsoft Outlook for email management and need to maintain accessible archives while minimizing local and network storage demands.

The software supports unlimited file sizes and both ANSI and Unicode PST formats created across all Microsoft Outlook releases. The application is compatible with all versions of Microsoft Outlook including twenty nineteen, twenty sixteen, twenty thirteen, twenty ten and earlier releases. It can process password protected PST files without requiring password credentials. Users can preview mailbox items in a hierarchical tree view to inspect email content and attachments prior to compression.

Attachment handling options include separate compression of attachments with the capability to store them in a dedicated folder or omit them from the compressed file while preserving message data. A built in duplicate removal engine identifies and eliminates redundant items based on sender, recipient, subject line, content body and blind carbon copy fields during compression. The software preserves the original folder hierarchy throughout the process and offers a file splitting feature to divide large compressed files by size parameter. Custom output directories can be defined for compressed files, log files and temporary files.

The standalone application operates on Windows eleven, ten, eight point one, eight and seven. Hardware recommendations include an Intel Core i five or higher processor operating at a minimum of three gigahertz, at least eight gigabytes of memory and five hundred megabytes of free disk space for installation with additional storage capacity calculated at twice the input file size. The trial version permits compression of up to fifty PST files for evaluation purposes. The application does not process corrupted files and requires the use of file repair utilities to address damaged archives prior to compression.