WordPress plugin comparison
King SMTP vs Solid Mail
At a glance
- Solid Mail has more active installs: 60K+, against 20+ for King SMTP.
- On a typical day, Solid Mail is downloaded about 189 times, King SMTP about 4.
- King SMTP has no reviews yet.
- King SMTP was updated more recently: Aug 3, 2026, against May 12, 2026 for Solid Mail.
- Both are tested up to WordPress 6.9.11.
- Solid Mail has been around longer: since 2012, against 2020 for King SMTP.
Line by line
Solid Mail leads on 4 of 5 comparable lines.
| Metric |  King SMTP |  Solid Mail |
|---|---|---|
| Popular rank | #25,595 | #671 |
| Active installs | 20+ | 60K+ |
| Downloads, last 30 days | 78 | 5.4K |
| Rating | No ratings | 4.2(52) |
| Support threads resolved | – | 0% |
| Tested up to | 6.9.11 | 6.9.11 |
| Search multiplier | ×0.15 | ×0.87 |
| Last release | 3 months ago | 6 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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