WordPress plugin comparison
Flex SMTP vs SMTP Mailer
At a glance
- SMTP Mailer has more active installs: 70K+, against fewer than 10 for Flex SMTP.
- On a typical day, SMTP Mailer is downloaded about 443 times, Flex SMTP about 2.
- Flex SMTP has no reviews yet.
- Flex SMTP was updated more recently: Sep 16, 2026, against Sep 7, 2026 for SMTP Mailer.
- Both are tested up to WordPress 7.1.4.
- SMTP Mailer has been around longer: since 2015, against 2026 for Flex SMTP.
Line by line
SMTP Mailer leads on 4 of 5 comparable lines.
| Metric |  Flex SMTP |  SMTP Mailer |
|---|---|---|
| Popular rank | #57,954 | #585 |
| Active installs | Fewer than 10 | 70K+ |
| Downloads, last 30 days | 42 | 12.8K |
| Rating | No ratings | 4.6(67) |
| Support threads resolved | – | 0% |
| Tested up to | 7.1.4 | 7.1.4 |
| Search multiplier | ×0.05 | ×1.06 |
| Last release | 1 month ago | 2 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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