WordPress plugin comparison

Really Simple CAPTCHA vs Multibyte CAPTCHA login and Mail only register

Really Simple CAPTCHA

by Rock Lobster Inc.

300K+ installs4.2

Multibyte CAPTCHA login and Mail only register

by Katsushi Kawamori

40+ installs

At a glance

Really Simple CAPTCHA has more active installs: 300K+, against 40+ for Multibyte CAPTCHA login and Mail only register.
On a typical day, Really Simple CAPTCHA is downloaded about 892 times, Multibyte CAPTCHA login and Mail only register about 5.
Multibyte CAPTCHA login and Mail only register has no reviews yet.
Really Simple CAPTCHA was updated more recently: Aug 23, 2026, against Aug 16, 2026 for Multibyte CAPTCHA login and Mail only register.
Both are tested up to WordPress 7.1.4.
Really Simple CAPTCHA has been around longer: since 2009, against 2019 for Multibyte CAPTCHA login and Mail only register.

Really Simple CAPTCHA leads on 5 of 5 comparable lines.

Metric	Really Simple CAPTCHA	Multibyte CAPTCHA login and Mail only register
Popular rank	#188	#22,485
Active installs	300K+	40+
Downloads, last 30 days	32.2K	134
Rating	4.2(131)	No ratings
Support threads resolved	0%	–
Tested up to	7.1.4	7.1.4
Search multiplier	×1.25	×0.21
Last release	2 months ago	2 months ago
Requires PHP	8.3	8.0

From WordPress.org's public data, refreshed every night. Downloads are WordPress.org's official daily figures for the last 30 days.

Track your plugin against its rivals every day: rank, installs, downloads, ratings and their releases, with alerts when anything moves.