⚡ Spam Protection

Anti-spam software is a variety of tools that protect websites from automated bots and malicious content.

These solutions often use challenge-response tests, content scanning, email obfuscation, and behavioral analysis to distinguish real users from automated threats.

According to our statistics, spam protection software is used on 16.6% of all websites.
89% of these sites use only one spam protection software solution, 9.8% use two, and 1.2% use three or more simultaneously.

⭐ Most Popular in 2026

The following chart shows the leading spam protection software in 2026, based on market share.

The most popular is reCAPTCHA, which dominates the market with a substantial 56.9% share.
It is followed by Cloudflare Email Obfuscation with 28.1% and hCaptcha with 15.1%.

reCAPTCHA 56.9%
Cloudflare Email Obfuscation 28.1%
hCaptcha 15.1%
Cloudflare Turnstile 5%
Akismet 3.8%
CleanTalk 2.8%
Friendly Captcha 0.2%
Yandex SmartCaptcha 0.2%
Altcha 0.1%
GeeTest 0.05%
Tencent Captcha 0.03%
MTCaptcha 0.02%
Yidun Captcha 0.02%
BitNinja 0.02%
Human Presence 0.007%

You can also drill down by country:

🚀 Country Highlights

Here is a list of software that is especially popular in certain countries.
Differences between global and country rankings are shown in parentheses.

Cloudflare Email Obfuscation is #1 in Thailand ^(-1)
hCaptcha is #1 in Pakistan ^(-2)
Akismet is #3 in Vietnam ^(-2)
Yandex SmartCaptcha is #3 in Russia ^(-5)
CleanTalk is #5 in the United Kingdom ^(-1)
Friendly Captcha is #5 in Germany ^(-2)

✨ Best Spam Protection Software

Below is a more detailed list of 17 spam protection software solutions we detect, ranked by their market share.

Rank	Name	Market share
1	reCAPTCHA Mountain View, California, United States A Google service that protects websites from spam, fraud, and automated abuse by distinguishing human users from bots. Free tier$8+/month	56.9%
2	Cloudflare Email Obfuscation San Francisco, California, United States Cloudflare Email Address Obfuscation hides email addresses on web pages from bots by encrypting them. Free$25+/month	28.1%
3	hCaptcha San Francisco, California, United States A security service for detecting and preventing human and automated abuse on websites and applications, often used as a drop-in alternative to reCAPTCHA. Free$99+/month	15.1%
4	Cloudflare Turnstile San Francisco, California, United States A user-friendly CAPTCHA alternative that verifies human visitors without requiring them to solve interactive puzzles or identify objects. Free$$$	5%
5	Akismet San Francisco, California, United States A comment spam filtering service originally developed for WordPress that can also be integrated with other CMS and forums. Free$14.95/month	3.8%
6	CleanTalk Carson City, Nevada, United States A cloud-based anti-spam protection service that protects websites from spambots. $12+/year	2.8%
7	Friendly Captcha Woerthsee, Germany A European captcha service that protects websites from bots and automated abuse while prioritizing user privacy, security, and accessibility. Free€9+/month	0.2%
8	Yandex SmartCaptcha Moscow, Russia A captcha service from the Russian company Yandex. Free tier$0.80	0.2%
9	Altcha Brno, Czech Republic An open-source, privacy-first, self-hosted captcha alternative that uses a proof-of-work mechanism to protect websites, APIs and online services from spam and unwanted content. FreeOpen source€24+/month	0.1%
10	GeeTest Wuhan, China A Chinese provider of CAPTCHA and bot management solutions. $$$	0.05%
11	Tencent Captcha Shenzhen, China Provides web and app developers with comprehensive human verification services through slider CAPTCHAs. Free tier$0.005+	0.03%
12	MTCaptcha Mountain View, California, United States A GDPR and WCAG compliant enterprise captcha service. Free tier$29+/month	0.02%
13	Yidun Captcha Hangzhou, China A captcha service provided by the Chinese company NetEase.	0.02%
14	BitNinja Debrecen, Hungary A server security suite with a centralized dashboard containing an AI-powered Linux malware scanner, IP reputation, WAF, and spam detection. Free$5+/month	0.02%
15	Human Presence Greenville, South Carolina, United States Web security software that identified human website visitors through human behavior analysis and proprietary machine learning algorithms. Free$3.99+/month	0.007%
16	Castle New York, United States A fraud prevention platform that helps businesses block bad bots, account takeovers, transaction fraud, and spam. Free$200+/month	0.002%
17	Vaptcha China A new type of human-machine verification solution based on AI and Big Data. Free$$$	0.001%

Data is based on the analysis of 3,324,982 websites.
Statistics were last calculated on March 30, 2026.
For details, see our methodology and disclaimer.