DS CF7 Math Captcha vs Serial Number for Contact Form 7 (2026)
Detailed side-by-side comparison of two WordPress plugins, based on real-time data from WordPress.org.
Serial Number for Contact Form 7
2.0K+ 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 2.0K+). Both are free WordPress plugins. DS CF7 Math Captcha has accumulated 72K+ total downloads while Serial Number for Contact Form 7 has 10K+.
Detailed Comparison
| Metric | DS CF7 Math Captcha | Serial Number for Contact Form 7 | |
|---|---|---|---|
| Rating | 5/5 | 5/5 | |
| Total Reviews | 8 | ◄ | 1 |
| Active Installs | 30K+ | ◄ | 2.0K+ |
| Total Downloads | 72K+ | ◄ | 10K+ |
| Support Resolution | 0% | N/A | |
| Last Updated | 1 month ago | ◄ | 2 years ago |
| First Released | 2021 | 2022 | |
| Age | 5 years | 4 years | |
| WP Requires | 6.5+ | 6.0+ | |
| PHP Requires | 7.4+ | 5.6+ | |
| Business Model | Free | Free | |
| Latest Version | 3.1.0 | 2.4.0 |
Rating Breakdown
DS CF7 Math Captcha
Serial Number for Contact Form 7
Download Trends
Over the past 30 days, DS CF7 Math Captcha averaged approximately 61 daily downloads while Serial Number for Contact Form 7 averaged 5.
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
Serial Number for Contact Form 7 Reviews
Great job!
Simple, little plugin but adds great functionality to the CF7 that takes CF7 to a next level…
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Frequently Asked Questions
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Plugin data sourced from WordPress.org. Comparison and analysis by PluginSift.