🆚 Akismet vs. Altcha
Compare technologies based on real-world usage data *- 📈 Akismet is much more popular than Altcha.
- 🌎 Akismet is more popular in the United States, the United Kingdom, and Australia.
- 🌍 Altcha is more popular in Iceland.
AkismetType
About
Akismet is a comment spam filtering service originally developed for 
WordPress that can also be integrated with other CMS and forums.
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.
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
- 🥉 Third most popular in Vietnam in the Spam Protection category.
- 🥉 Third most popular in Iran in the Spam Protection category.
- 🥉 Third most popular in Ukraine in the Spam Protection category.
- 🥉 Third most popular in Belarus in the Spam Protection category.
- ⭐ 4th most popular in the United States in the Spam Protection category.
- ⭐ 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.
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
Cloudflare Email Obfuscation
hCaptcha
Cloudflare Turnstile
Friendly 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.