⚡ 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 17.7% of websites from the United States.

⭐ 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, which dominates the market with a substantial 61.3% share.
It is followed by Cloudflare Email Obfuscation with 24% and hCaptcha with 13%.

🚀 Highlights

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

✨ Best Spam Protection Software

Below is a more detailed list of 16 spam protection software solutions used on sites from the United States, ranked by their market share.

RankNameMarket 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
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
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
4
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
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$$$
6
CleanTalk
Carson City, Nevada, United States

A cloud-based anti-spam protection service that protects websites from spambots.

$12+/year
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€24+/month
8
GeeTest
Wuhan, China

A Chinese provider of CAPTCHA and bot management solutions.

$$$
9
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
10
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
11
MTCaptcha
Mountain View, California, United States

A GDPR and WCAG compliant enterprise captcha service.

Free tier$29+/month
12
Yidun Captcha
Hangzhou, China

A captcha service provided by the Chinese company NetEase.
13
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
14
Tencent Captcha
Shenzhen, China

Provides web and app developers with comprehensive human verification services through slider CAPTCHAs.

Free tier$0.005+
15
Castle
New York, United States

A fraud prevention platform that helps businesses block bad bots, account takeovers, transaction fraud, and spam.

Free$200+/month
16
Yandex SmartCaptcha
Moscow, Russia

A captcha service from the Russian company Yandex.

Free tier$0.80

👉 See Also

Data is based on the analysis of 560,647 websites from the United States.
Statistics were last calculated on .
For details, see our methodology and disclaimer.