SysTools Outlook Duplicate Remover vs ContactZapp

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 ContactZapp
Detail	SysTools Outlook Duplicate Remover	ContactZapp
What it does	Certified tool to remove duplicate emails, contacts, calendars, and other Outlook items from PST, OST, and BAK files	Sync your contacts between Google, Microsoft, Apple and CardDAV. Find and merge duplicates easily.
Stage	Established	Not given
Founded	2007	Not given
Based in	IN	Not given
Pricing model	Paid	Freemium
Pricing	$49 USD	Free plan: 2 synced accounts, 100 contacts, no time limit. Easy plan: $4.00/month (billed $47.94/year, was $95.88). Unlimited plan: $8.00/month (billed $95.94/year, was $191.88). 50% off Easy and Unlimited with code HALLOWEEN.
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	Two-way sync across Google, Microsoft, Apple and CardDAV Merge duplicates in one go, or review them one by one Full change history with undo capability Backups and vCard export Sync frequency control (hourly, daily, or manual) Set accounts to read-only mode Preserve all phone numbers and email addresses Up to 5 encrypted account backups 12-month undo history Restore deleted contacts for 12 months
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	Syncs across all major platforms in both directions automatically Encrypted contacts with privacy key per account Undo any change for up to 12 months No time limit on free plan Automatic duplicate detection and optional auto-merge
Free plan	Not given	Not given
Open source	Not given	Not given
Platforms	Not given	Not given
Public API	Not given	Not given
Community votes	0	0
DR (Domain Rating by Ahrefs)	69 +1 (up) since last check	Not checked yet no change since last check
Trust Flow (Majestic)	20	0
Citation Flow (Majestic)	46	11
Referring domains (Majestic)	1748	1

5 details filled in for both companies.

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