🆚 Altcha vs. CleanTalk
Compare technologies based on real-world usage data *- 📈 CleanTalk is much more popular than Altcha.
- 🌎 CleanTalk is more popular in the United States, the United Kingdom, and Australia.
- 🌍 Altcha is more popular in Iceland.
Type
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.
CleanTalk is a cloud-based anti-spam protection service that protects websites from spambots.
Headquarters
Pricing
Categories
Popularity
Determined by the number of sites using each technology.
Market share
Popularity by country
Determined by the number of sites detected from each country.
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.
- ⭐ 4th most popular in Denmark in the Spam Protection category.
- ⭐ 4th most popular in Israel in the Spam Protection category.
- ⭐ 5th most popular in the United Kingdom in the Spam Protection category.
- ⭐ 5th most popular in Australia in the Spam Protection category.
- ⭐ 5th most popular in Russia in the Spam Protection category.
Popularity by domain category
Determined by the number of sites in each category.
Top sites
Top-ranked sites that use these technologies.
Compare alternatives
Technologies with similar characteristics.
reCAPTCHA
hCaptcha
Cloudflare Turnstile
Friendly Captcha
Cloudflare Email Obfuscation
Akismet* 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.