🆚 Altcha vs. Yidun Captcha
Compare technologies based on real-world usage data *- 📈 Altcha is five times more popular than Yidun Captcha.
- 🌎 Altcha is more popular in Germany, France, and the United States.
- 🌍 Yidun Captcha is more popular in China and Hong Kong.
Type
Captcha service
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.
Yidun is a captcha service provided by the Chinese company NetEase.
Headquarters
Brno, Czech Republic
Hangzhou, China
Pricing
Free version ✔️Open source
ALTCHA Sentinel€24+/month
Categories
Popularity
Determined by the number of sites using each technology.
The Altcha captcha service is 5 times more popular than Yidun Captcha.
Total websites
Market share
Captchas
Spam Protection
Popularity by country
Determined by the number of sites detected from each country.
Altcha is more popular in Germany, France, and the United States, while Yidun Captcha is more popular in China and Hong Kong.
Germany
China
France
United States
United Kingdom
Czech Republic
Switzerland
Austria
Poland
Sweden
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.
- ⭐ 5th most popular in Germany in the Captchas category.
- ⭐ 5th most popular in the United States in the Captchas category.
- ⭐ 5th most popular in China in the Captchas category.
- ⭐ 6th most popular in China in the Spam Protection category.
Popularity by domain category
Determined by the number of sites in each category.
Altcha is more popular than Yidun Captcha in all market segments.
Business
Marketing/Merchandising
Online Shopping
Internet Services
Non-Profit/Advocacy/NGO
Education/Reference
General News
Software/Hardware
Real Estate
Travel
Top sites
Top-ranked sites that use these technologies.
Compare alternatives
Technologies with similar characteristics.
reCAPTCHA
hCaptcha
Cloudflare Turnstile
Friendly Captcha
Tencent Captcha* According to recent studies, many of online reviews are fake.
When making your decision, it is better to rely on data that cannot be falsified.
Our service evaluates the popularity of technologies by the number of websites using them.