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SysTools Outlook Duplicate Remover vs Diurnal

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

SysTools Outlook Duplicate Remover compared with Diurnal
DetailSysTools Outlook Duplicate Remover logo SysTools Outlook Duplicate RemoverDiurnal logo Diurnal
What it doesCertified tool to remove duplicate emails, contacts, calendars, and other Outlook items from PST, OST, and BAK files A native Mac notepad where everything you write becomes a task, with automatic tidying
StageEstablished Not given
Founded2007 Not given
Based inIN Not given
Pricing modelPaid Not given
Pricing$49 USD Not given
Key features
  • Removes duplicate emails, contacts, calendars, tasks, journals and notes
  • Works with PST, OST, and BAK file formats
  • Operates without requiring Microsoft Outlook installation
  • Batch processing of multiple files simultaneously
  • Multiple removal actions including permanent delete, move to folder, flag, and mark as expired
  • Process duplicates within single folder or across multiple folders
  • Advanced duplicate detection based on 14 email properties
  • Date range filtering for old and current duplicate data
  • Split oversized files from 10 MB to 200 GB
  • Preserves folder hierarchy and data integrity during process
  • Write tasks inline as natural paragraphs
  • No required dates for tasks
  • Automatic task archiving
  • Project management with deadlines
  • Google Calendar integration
  • Voice capture
  • Focus mode with Pomodoro timer
  • AI assistant integration via MCP
  • Offline sync across all Macs
  • Drag-and-drop task planning
What makes it different
  • Standalone tool that works without installing Microsoft Outlook
  • Handles password-protected Outlook files
  • Provides multiple removal actions beyond permanent deletion
  • Supports all Outlook versions including Outlook 2024
  • Can run without administrator privileges
  • Automatic tidying eliminates manual maintenance
  • No overdue piles or red tasks
  • Native Mac performance built for one platform
  • Works offline without syncing delays
  • Combines notepad freedom with task structure
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)69 +1 (up) since last check7 +1 (up) since last check
Trust Flow (Majestic)203
Citation Flow (Majestic)4624
Referring domains (Majestic)174823

3 details filled in for both companies.

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