MailTester Ninja vs Postling

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

MailTester Ninja compared with Postling
Detail	MailTester Ninja	Postling
What it does	Email verification and finder tool that processes data in real time without storage	Private email assistant that sorts Gmail, files the noise and briefs you on what matters, entirely on your Mac
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	GB
Pricing model	Freemium	Paid
Pricing	Free version verifies one email at a time with no signup. Pro plan: 100,000 emails per day. Ultimate plan: 200,000 emails per day. Plan quantities can be multiplied at checkout; for example Ultimate x5 gives 1,000,000 emails per day. Bitcoin payment accepted via Pay with crypto option.	Postling: £79 once (one person, up to 2 Macs); Household: £119 once, up to 5 people; Teams: £79 per person (20% off for 5 people or more). Founding licence: £59 for Postling or £89 for Household. Updates included for the first year; after that £29 a year per person or £45 for a household (optional).
Key features	Real-time email verification checking DNS records and SMTP Email finder to discover valid business contact addresses Detects invalid, disposable and catch-all addresses Anti-spam detection and deliverability analysis Syntax validation for email format RESTful API integration for applications Analytics and reporting of verification results CSV export and spreadsheet integration No data storage or retention of verified emails GDPR compliant privacy-first verification	Keeps only what needs you in inbox Dates go in your calendar Reads attached school letters Works with multiple Gmail accounts Shared briefings Works with existing labels and filters Runs entirely on your Mac
What makes it different	Never stores verified email addresses on servers, ensuring full GDPR compliance Achieves bounce rate of less than 1% with verified emails Uses deep technical analysis beyond surface-level email checks No signup required, free access with no personal data collection Over ten years of industry experience in email verification and deliverability	Email stays entirely on your Mac with no servers Pay once, no subscription AI runs on device using Apple Intelligence Works with Google Workspace and personal Gmail
Community votes	0	0
DR (Domain Rating by Ahrefs)	39 +2 (up) since last check	6 no change since last check
Trust Flow (Majestic)	14	0
Citation Flow (Majestic)	32	12
Referring domains (Majestic)	207	3

5 details filled in for both companies.

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