🆚 Altcha vs. AWS WAF Captcha

📈 Altcha is slightly more popular than AWS WAF Captcha.
🌍 Altcha is more popular in Germany, France, and the United Kingdom.
🌎 AWS WAF Captcha is more popular in the United States, the Netherlands, and Australia.

Statistics based on 3.5M+ analyzed websites. About this data

Altcha

AWS WAF Captcha

Type

Captcha service

About

Altcha is 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.

It performs client-side computational challenges based on hashing and memory-hard algorithms such as Argon2 and Scrypt, adds headers and signatures for verification, operates without cookies, fingerprinting, or external requests, and supports more than 50 languages to meet accessibility and privacy requirements.

AWS WAF Captcha is a feature of the AWS WAF web application firewall that helps protect web applications by requiring requests that match specific criteria to solve a captcha puzzle or silent challenge before proceeding.

It allows users to embed a JavaScript API in client-side applications, apply captcha or silent challenge actions based on rate-based, bot control, or custom inspection rules, and configure token immunity time.

Headquarters

Brno, Czech Republic

Seattle, Washington, United States

Website

altcha.org #175,575

docs.aws.amazon.com/waf/

Pricing

Free version ✔️Open source

ALTCHA Sentinel€99+/month

Captcha$0.4/1K analyzed attempts

Challenge$0.4/1M responses

AWS WAFWeb ACL$5/month
Rule$1/month
Requests$0.6/1M requests

Popularity

Determined by the number of sites using each technology.

The Altcha captcha service is 1.2 times more popular than AWS WAF Captcha.

Total websites

Market share

Captchas

Popularity by country

Determined by the number of sites detected from each country.

Altcha is more popular in Germany, France, and the United Kingdom, while AWS WAF Captcha is more popular in the United States, the Netherlands, and Australia.

Germany

United States

France

United Kingdom

Switzerland

Netherlands

Australia

Czech Republic

Austria

Singapore

Awards

⭐ 4th most popular in France in the Captchas category.
⭐ 4th most popular in the United Kingdom in the Captchas category.
⭐ 4th most popular in the Czech Republic in the Captchas category.
⭐ 4th most popular in Poland in the Captchas category.
⭐ 5th most popular in Germany in the Captchas category.

⭐ 4th most popular in the United States in the Captchas category.
⭐ 4th most popular in Singapore in the Captchas category.
⭐ 4th most popular in Australia in the Captchas category.
⭐ 5th most popular in Singapore in the Bot Mitigation category.
⭐ 5th most popular in the Netherlands in the Captchas category.

Popularity by domain category

Determined by the number of sites in each category.

Altcha is more popular among sites focused on non-profit, advocacy and NGO, Internet services, and general news, while AWS WAF Captcha is more commonly used on business, online shopping, and marketing and merchandising sites.

Business

Online Shopping

Marketing/Merchandising

Education/Reference

Finance/Banking

Real Estate

Non-Profit/Advocacy/NGO

Software/Hardware

Entertainment

Travel

Top sites

Top-ranked sites that use these technologies.

Name

Rank

#5,726

#7,004

#8,664

#15,520

#23,074

Name

Rank

#265

#284

#445

#486

sportyb*t.com

#721