WordPress plugin comparison
Smooth SMTP vs Solid Mail
At a glance
- Solid Mail has more active installs: 60K+, against 100+ for Smooth SMTP.
- On a typical day, Solid Mail is downloaded about 189 times, Smooth SMTP about 6.
- Smooth SMTP is rated higher: 4.7 out of 5 from 3 reviews, against 4.2 from 52 reviews.
- Solid Mail was updated more recently: May 12, 2026, against Mar 1, 2026 for Smooth SMTP.
- Both are tested up to WordPress 6.9.11.
- Solid Mail has been around longer: since 2012, against 2025 for Smooth SMTP.
Line by line
Solid Mail leads on 5 of 6 comparable lines.
| Metric |  Smooth SMTP |  Solid Mail |
|---|---|---|
| Popular rank | #14,562 | #671 |
| Active installs | 100+ | 60K+ |
| Downloads, last 30 days | 122 | 5.4K |
| Rating | 4.7(3) | 4.2(52) |
| Support threads resolved | 0% | 0% |
| Tested up to | 6.9.11 | 6.9.11 |
| Search multiplier | ×0.29 | ×0.87 |
| Last release | 8 months ago | 6 months ago |
| Requires PHP | 7.4 | 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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