MailTester Ninja vs Donezo Inbox

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 Donezo Inbox
Detail	MailTester Ninja	Donezo Inbox
What it does	Email verification and finder tool that processes data in real time without storage	Fast, keyboard-first Gmail client with an AI assistant you control
Stage	Not given	MVP
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Freemium	Freemium
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.	Free: one Gmail or Workspace inbox, split inbox, snooze, send later, reminders, snippets, calendar, analytics, Claude/ChatGPT/Codex read and draft access, 20 hosted AI calls. Pro: $29/year, covers unlimited inboxes, Claude/ChatGPT/Codex send and archive, hosted AI, background assistant.
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	Keyboard shortcuts for every action (J/K to move, E to mark done, H to snooze, R to reply) Split inbox with people-first sorting Snooze with natural language Send later and scheduled sends AI-powered draft writing in your tone Undo send up to 30 seconds Claude, ChatGPT and Codex integration AI mail triage with automatic labels Meeting briefs with recent context Gmail stays your source of truth
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	90% cheaper than Superhuman at $29/year vs $300/year One inbox free forever with no limits AI assistant off by default and never sends Works with any AI: bring your own key, local model or Chrome's Mail stays in Gmail, Donezo keeps minimal data
Community votes	0	0
DR (Domain Rating by Ahrefs)	39 +2 (up) since last check	2 no change since last check
Trust Flow (Majestic)	14	3
Citation Flow (Majestic)	32	16
Referring domains (Majestic)	207	3

5 details filled in for both companies.

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