WordPress plugin comparison
King SMTP vs SendGrail SMTP
At a glance
- King SMTP has more active installs: 20+, against 10+ for SendGrail SMTP.
- On a typical day, SendGrail SMTP is downloaded about 6 times, King SMTP about 4.
- King SMTP has no reviews yet.
- SendGrail SMTP was updated more recently: Nov 1, 2026, against Aug 3, 2026 for King SMTP.
- SendGrail SMTP is tested with a newer WordPress: 7.1.4, against 6.9.11 for King SMTP.
- King SMTP has been around longer: since 2020, against 2026 for SendGrail SMTP.
Line by line
SendGrail SMTP leads on 4 of 6 comparable lines.
| Metric |  King SMTP |  SendGrail SMTP |
|---|---|---|
| Popular rank | #25,595 | #42,066 |
| Active installs | 20+ | 10+ |
| Downloads, last 30 days | 78 | 252 |
| Rating | No ratings | 5.0(1) |
| Support threads resolved | – | 100% |
| Tested up to | 6.9.11 | 7.1.4 |
| Search multiplier | ×0.15 | ×0.22 |
| Last release | 3 months ago | 8 days ago |
| Requires PHP | – | 8.0 |
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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