GlockApps vs Mail-tester
Side-by-side from the Top 11 ranking of The 11 Best Email Deliverability Tools. Last verified June 15, 2026.
The short answer
GlockApps ranks higher on Top 11 (#1 vs #3) for Email marketers and developers improving inbox placement rates. Top-tier inbox placement testing with a broad, international seed list and actionable reports.
At a glance
| GlockApps | Mail-tester | |
|---|---|---|
| Top 11 rank | #1 / The 11 Best Email Deliverability Tools | #3 / The 11 Best Email Deliverability Tools |
| Score (out of 9.4) | 9.2 | 8.8 |
| Best for | Detailed inbox placement testing | Quick, on-demand spam checks |
| Pricing | $$ ($79 to $399/mo) | $ (Pay-as-you-go or $50/mo) |
| HQ | Hong Kong | London, UK |
| Founded | 2011 | 2014 |
GlockApps
Top-tier inbox placement testing with a broad, international seed list and actionable reports.
glockapps.com/Mail-tester
The fastest, simplest tool for a single pre-send spam check and technical audit.
www.mail-tester.com/Methodology and scoring weights live at /methodology. No vendor pays for placement — see about.