DS CF7 Math Captcha vs Contact Form 7 Spam Killer (2026)
Detailed side-by-side comparison of two WordPress plugins, based on real-time data from WordPress.org.
Contact Form 7 Spam Killer
4.0K+ active installs
Free
Quick Verdict
As of April 2026, DS CF7 Math Captcha has a higher user rating (5/5 from 8 reviews) and leads in active installations (30K+ vs 4.0K+). Both are free WordPress plugins. DS CF7 Math Captcha has accumulated 72K+ total downloads while Contact Form 7 Spam Killer has 29K+.
Detailed Comparison
| Metric | DS CF7 Math Captcha | Contact Form 7 Spam Killer | |
|---|---|---|---|
| Rating | 5/5 | 5/5 | |
| Total Reviews | 8 | ◄ | 4 |
| Active Installs | 30K+ | ◄ | 4.0K+ |
| Total Downloads | 72K+ | ◄ | 29K+ |
| Support Resolution | 0% | N/A | |
| Last Updated | 1 month ago | ◄ | 8 months ago |
| First Released | 2021 | 2015 | |
| Age | 5 years | 11 years | |
| WP Requires | 6.5+ | 5.6+ | |
| PHP Requires | 7.4+ | false+ | |
| Business Model | Free | Free | |
| Latest Version | 3.1.0 | 1.8 |
Rating Breakdown
DS CF7 Math Captcha
Contact Form 7 Spam Killer
Download Trends
Over the past 30 days, DS CF7 Math Captcha averaged approximately 61 daily downloads while Contact Form 7 Spam Killer averaged 7.
Recent Reviews
DS CF7 Math Captcha Reviews
Best Contact Form Spam Protection
This is by far the easiest and best spam protection plugin for contact forms on your website. Better still it’s free with great support.
Nice and simple
This is very good captcha plugin! Easy to use, optically nice and the plugin author seems to react very quick to questions/issues.
Asm spam protection CF7
I’ve been using the DS CF7 Math Captcha plugin for my Contact Form 7 forms, and it’s been fantastic at stopping spam! The math-based captchas are simple for users but effective against bots. Highly re
Contact Form 7 Spam Killer Reviews
Easy install and integration
so far so good. Thank you or the instruction and easy installation. It is working on my website and … I hope it does the job with killing some of the unwanted messages. Thank you!
Top! Plugin
I like it
Very good plugin and amazing support
The plugin is very good, works perfectly. I needed to adjust it to RTL and contacted the developer. I received prompt reply and all the support that I needed. Not obvious to receive such support for a
Frequently Asked Questions
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Plugin data sourced from WordPress.org. Comparison and analysis by PluginSift.