WordPress plugin comparison
Authority Mailer SMTP vs King SMTP
At a glance
- King SMTP has more active installs: 20+, against 10+ for Authority Mailer SMTP.
- On a typical day, King SMTP is downloaded about 4 times, Authority Mailer SMTP about 3.
- King SMTP has no reviews yet.
- King SMTP was updated more recently: Aug 3, 2026, against Jul 12, 2026 for Authority Mailer SMTP.
- Authority Mailer SMTP is tested with a newer WordPress: 7.0.8, against 6.9.11 for King SMTP.
- King SMTP has been around longer: since 2020, against 2025 for Authority Mailer SMTP.
Line by line
Level: each leads on 3 of 6 comparable lines.
| Metric |  Authority Mailer SMTP |  King SMTP |
|---|---|---|
| Popular rank | #48,253 | #25,707 |
| Active installs | 10+ | 20+ |
| Downloads, last 30 days | 81 | 74 |
| Rating | 5.0(1) | No ratings |
| Support threads resolved | – | – |
| Tested up to | 7.0.8 | 6.9.11 |
| Search multiplier | ×0.19 | ×0.15 |
| Last release | 4 months ago | 3 months ago |
| Requires PHP | 7.4 | – |
From WordPress.org's public data, refreshed every night. Downloads are WordPress.org's official daily figures for the last 30 days.
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