Mail-tester vs Litmus
Side-by-side from the Top 11 ranking of GlockApps vs Validity vs Mail-tester: 11 Best Email Deliverability Tools 2026. Last verified June 15, 2026.
The short answer
Mail-tester ranks higher on Top 11 (#3 vs #7) for Email marketers and developers improving inbox placement rates. The fastest, simplest tool for a single pre-send spam check and technical audit.
At a glance
| Mail-tester | Litmus | |
|---|---|---|
| Top 11 rank | #3 / GlockApps vs Validity vs Mail-tester: 11 Best Email Deliverability Tools 2026 | #7 / GlockApps vs Validity vs Mail-tester: 11 Best Email Deliverability Tools 2026 |
| Score (out of 9.4) | 8.8 | 7.9 |
| Best for | Quick, on-demand spam checks | Integrated design and deliverability |
| Pricing | $ (Pay-as-you-go or $50/mo) | $$$ ($199 to $499/mo) |
| HQ | London, UK | Cambridge, USA |
| Founded | 2014 | 2005 |
Mail-tester
The fastest, simplest tool for a single pre-send spam check and technical audit.
www.mail-tester.com/See full entry in GlockApps vs Validity vs Mail-tester: 11 Best Email Deliverability Tools 2026
Litmus
A strong email creation and analytics platform with good, integrated deliverability checks.
www.litmus.com/See full entry in GlockApps vs Validity vs Mail-tester: 11 Best Email Deliverability Tools 2026
Methodology and scoring weights live at /methodology. No vendor pays for placement — see about.