What powers 21st.bio?
Last seen Jun 2026 · 29 technologies across 17 categories
Advertising
Google AdSense
since Apr 2024
Microsoft Advertising
since Dec 2024
Analytics
Google Analytics
since Apr 2024
CMS
Cookie compliance
Databases
MySQL
since Feb 2022
Font scripts
Google Font API
since Feb 2022
Twitter Emoji (Twemoji)
since Feb 2022
JavaScript graphics
JavaScript libraries
Miscellaneous
Performance
Priority Hints
since Dec 2024
Programming languages
PHP
since Feb 2022
Security
Really Simple SSL & Security
since Apr 2024
reCAPTCHA
since Apr 2024
Tag managers
Google Tag Manager
since Dec 2024
UI frameworks
Animate.css
since Oct 2022
Web servers
Apache HTTP Server
since Feb 2022
Webmail
Apple iCloud Mail
since Jan 2023
Microsoft 365
since Oct 2022
WordPress plugins
Audience
- 100% desktop
Denmark
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
2.75 / 10 · ranked #2,093,497 of all domains
34 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.3 s |
| INP | 25 ms |
| CLS | 0 |
| TTFB | 1100 ms |
Real user p75, Chrome UX Report, Jun 2026.