🆚 CSS vs. RSD
Compare technologies based on real-world usage data *- 📈 CSS is three times more popular than RSD.
- 🌍 CSS is more popular in all countries.
CSSType
About
Cascading Style Sheets (CSS) is a stylesheet language used to control the presentation of 
HTML and 
XML documents, defining layout, colors, typography, and responsive behavior across different devices.
It uses a cascading and specificity model to resolve style conflicts, supports reusable rules and selectors, and includes layout systems such as Flexbox and Grid, media queries for responsive design, and features for animations, transformations, and advanced text formatting.
Really Simple Discovery (RSD) is an XML format that helps client software find the services needed to read, edit, or "work with" weblogging software.
Headquarters
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
- 🥇 Most popular in the United States in the Standards category.
- 🥇 Most popular in Japan in the Standards category.
- 🥇 Most popular in the United Kingdom in the Standards category.
- 🥇 Most popular in France in the Standards category.
- 🥇 Most popular in the Netherlands in the Standards category.
- 🥉 Third most popular in El Salvador in the Standards category.
- 🥉 Third most popular in Bhutan in the Standards category.
- 🥉 Third most popular in Libya in the Standards category.
- ⭐ 4th most popular in Spain in the Standards category.
- ⭐ 4th most popular in Italy in the Standards 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.
YAML
Sass
XFN
OpenSearch* 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.