What powers 21st.com?
Last seen Jun 2026 · 25 technologies across 18 categories
Analytics
Dynatrace
since Aug 2023
FullStory
since Jun 2023
Google Analytics
since Jun 2018
VWO
since Jun 2022
CDN
Incapsula
since Apr 2018
CRM
Salesforce
since Jan 2022
Salesforce Desk
since Oct 2022
Customer data platform
Segment
since Dec 2021
Font scripts
Google Font API
since Apr 2018
JavaScript frameworks
Vue.js
since Dec 2025
JavaScript libraries
Load balancers
Amazon ALB
since Jan 2025
Miscellaneous
DocuSign
since Aug 2022
PaaS
Amazon Web Services
since Jan 2025
Programming languages
Java
since Jun 2018
Security
Surveys
Qualtrics
since Jan 2022
Tag managers
Google Tag Manager
since Jun 2018
UI frameworks
Bootstrap
since Dec 2020
Web frameworks
Java Servlet
since Jun 2018
Web servers
Apache HTTP Server
since Apr 2020
Widgets
Facebook
since Apr 2020
Google Plus
since Jun 2018
Audience
- 57% phone
- 43% desktop
United States
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
3.80 / 10 · ranked #714,317 of all domains
78 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.9 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 800 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: English (United States)
- CDN: Incapsula
- Weight: 0.7 MB · 39 requests
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| claims.21st.com | 12 |
| 21st.com | 10 |
| www.21st.com | 10 |
| ebm.e.21st.com | 4 |
Full technology history →
Report an incorrect detection
Recent changes
- dropped Akamai Dec 2025
- dropped Akamai Web Application Protector Dec 2025
- detected Vue.js Dec 2025
- detected Akamai Oct 2025
- detected Akamai Web Application Protector Oct 2025