ZeroBounce vs GlockApps
Side-by-side from the Top 11 ranking of The 11 Best Email Deliverability Tools (2026). Last verified June 15, 2026.
The short answer
GlockApps ranks higher on Top 11 (#1 vs #9) 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
| ZeroBounce | GlockApps | |
|---|---|---|
| Top 11 rank | #9 / The 11 Best Email Deliverability Tools (2026) | #1 / The 11 Best Email Deliverability Tools (2026) |
| Score (out of 9.4) | 7.5 | 9.2 |
| Best for | Verification with add-on tools | Detailed inbox placement testing |
| Pricing | $ (Pay-as-you-go or $15/mo+) | $$ ($79 to $399/mo) |
| HQ | Santa Barbara, USA | Hong Kong |
| Founded | 2015 | 2011 |
ZeroBounce
An excellent list verification service with a growing suite of deliverability add-ons.
www.zerobounce.net/See full entry in The 11 Best Email Deliverability Tools (2026)
GlockApps
Top-tier inbox placement testing with a broad, international seed list and actionable reports.
glockapps.com/See full entry in The 11 Best Email Deliverability Tools (2026)
Methodology and scoring weights live at /methodology. No vendor pays for placement — see about.