ContactZapp vs StampName

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

ContactZapp compared with StampName
Detail	ContactZapp	StampName
What it does	Sync your contacts between Google, Microsoft, Apple and CardDAV. Find and merge duplicates easily.	Rename every invoice on your Mac
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Freemium	Paid
Pricing	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.	Pro Yearly: $19.99/year; Pro Lifetime: $39.99 once. Early bird pricing (70% off) applied at checkout for first 25 customers. Both plans include unlimited renames, custom formats, and up to 3 Macs. 14-day refund guarantee through Polar.
Key features	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	Automatic text extraction from invoices and receipts Color-coded value highlighting showing extraction source Bulk processing with review mode for uncertain entries Custom naming format builder Free unlimited undo with file integrity checks File collision handling with automatic suffixes Local rename history and journal Try with sample invoices before purchasing
What makes it different	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	No uploads or cloud processing - everything runs locally on your Mac No AI, accounts, or tracking required Values outlined on page showing exactly where names came from Works offline after initial activation
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)	Not checked yet no change since last check	Not checked yet no change since last check
Trust Flow (Majestic)	0	0
Citation Flow (Majestic)	11	0
Referring domains (Majestic)	1	0

5 details filled in for both companies.

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