ContactZapp vs Emailyst

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 Emailyst
Detail	ContactZapp	Emailyst
What it does	Sync your contacts between Google, Microsoft, Apple and CardDAV. Find and merge duplicates easily.	Clean up Apple Mail on your Mac using built-in AI, nothing uploaded
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Freemium	Freemium
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.	Free: up to 1,000 emails per mail account with full message grouping and review. Full version: $29 once, covering up to three Macs and all version 1 updates, with no email limit and automatic sorting on a schedule.
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	Groups emails by type: newsletters, promotions, notifications and other categories Local processing with no uploads using macOS built-in AI Reversible email moves with full history Works with Gmail, Outlook, iCloud and Fastmail Automatic scheduled sorting in full version Custom rules available Can process multiple mailboxes Learns from user preferences Supports up to three Macs with one licence
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	Runs entirely on your Mac with no email uploads to servers Never deletes emails, only moves them with reversible operations Uses macOS native language model, signed and notarized by Apple Free version with no account required
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	3 +2 (up) since last check
Trust Flow (Majestic)	0	14
Citation Flow (Majestic)	11	14
Referring domains (Majestic)	1	3

5 details filled in for both companies.

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