⚡ Spam Protection in the United States

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

The United States of America (USA) is a North American country with a population of over 341 million people.

According to our statistics, spam protection software is used on 25% of websites from the United States.

Statistics based on 654K+ analyzed websites. About this data

⭐ Most Popular in 2026

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

The most popular is reCAPTCHA with an impressive share of 46.7%, followed by hCaptcha with 35.2% and Cloudflare Email Obfuscation with 18.6%.

reCAPTCHA 46.7%
hCaptcha 35.2%
Cloudflare Email Obfuscation 18.6%
Cloudflare Turnstile 11.8%
Akismet 5.6%
CleanTalk 4.1%
Altcha 0.07%
Friendly Captcha 0.02%
MTCaptcha 0.01%
GeeTest 0.01%
Castle 0.004%
Yandex SmartCaptcha 0.003%
BitNinja 0.003%
Tencent Captcha 0.002%
Cap 0.002%

🚀 Highlights

Here is a list of the top solutions that is more popular in the United States than worldwide.
Differences between global and country rankings are shown in parentheses.

2. hCaptcha ^(-1)
7. Altcha ^(-2)
9. MTCaptcha ^(-3)
11. Castle ^(-5)
13. BitNinja ^(-1)
16. Human Presence ^(-1)

✨ Best Spam Protection Software

Below is a more detailed list of 17 spam protection software solutions used on sites from the United States, 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	46.7%
2	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	35.2%
3	Cloudflare Email Obfuscation San Francisco, California, United States A Cloudflare Scrape Shield security feature that encrypts email addresses in HTML to hide them from harvesting bots and keep them visible and clickable for human visitors. Free$25+/month	18.6%
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$$$	11.8%
5	Akismet San Francisco, California, United States A comment spam filtering service originally developed for WordPress that can also be integrated with other CMS and forums. Free$14.95/month	5.6%
6	CleanTalk Carson City, Nevada, United States A cloud-based anti-spam service that protects websites from automated spam in online forms, comments, and registrations. $12+/year	4.1%
7	Altcha Brno, Czech Republic An open-source, privacy-first, self-hosted captcha alternative that uses a proof-of-work mechanism to protect websites, APIs, and online services from spam and unwanted content. FreeOpen source€99+/month	0.07%
8	Friendly Captcha Woerthsee, Germany A European captcha service that protects websites from bots and automated abuse while prioritizing user privacy, security, and accessibility. Free€9+/month	0.02%
9	MTCaptcha Mountain View, California, United States An enterprise captcha service that provides bot detection and human verification with a focus on GDPR compliance and accessibility. Free$29+/month	0.01%
10	GeeTest Wuhan, China A Chinese bot management and CAPTCHA platform that uses behavioral analysis, machine learning, and device fingerprinting to distinguish human users from automated traffic. $$$	0.01%
11	Castle New York, United States A fraud prevention platform that helps businesses block bad bots, account takeovers, transaction fraud, and spam. Free$200+/month	0.004%
12	Yandex SmartCaptcha Moscow, Russia A captcha and bot protection service from the Russian technology company Yandex. Free tier$0.80	0.003%
13	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	0.003%
14	Tencent Captcha Shenzhen, China Provides web and app developers with comprehensive human verification services through slider CAPTCHAs. Free tier$0.005+	0.002%
15	Cap Lisbon, Portugal An open-source, self-hosted reCAPTCHA alternative that verifies visitors without visual puzzles, tracking, or third-party services. FreeOpen source	0.002%
16	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	0.002%
17	Yidun Captcha Hangzhou, China A captcha service provided by the Chinese company NetEase.	0.001%

👉 See Also

🌎 Spam Protection in other countries

🗃️ About This Data

We evaluate the popularity of technologies based on the number of websites where we detect their usage.
Technologies without a detectable web footprint, and those we do not track, are not reflected in the calculated market share.
This report is based on the analysis of 654,819 websites from the United States.
We currently track the presence of 18 spam protection software solutions across the web.
Of these, 17 were detected on websites from the United States.
Statistics were last calculated on September 27, 2026.
For more details, see our methodology and disclaimer.