What powers opensafely.org?
Last seen Jun 2026 · 34 technologies across 21 categories
Analytics
Google Analytics
since Jul 2020
Plausible
since Jun 2021
CDN
Cloudflare
since Mar 2021
jsDelivr
since Jul 2020
CMS
WordPress
since Mar 2026
Databases
MySQL
since Mar 2026
Documentation
MailChimp
since Jan 2021
Font scripts
Font Awesome
since Mar 2021
Google Font API
since Jul 2020
Issue trackers
Cloudflare Network Error Logging
since Feb 2022
JavaScript frameworks
JavaScript libraries
Miscellaneous
PaaS
WP Engine
since Mar 2026
Performance
Priority Hints
since Mar 2026
Programming languages
Security
Cloudflare Bot Management
since Mar 2026
HSTS
since Oct 2024
SEO
The SEO Framework
since Mar 2026
UI frameworks
Tailwind CSS
since Oct 2024
Video players
YouTube
since Mar 2021
Web servers
Nginx
since Oct 2024
Webmail
Google Workspace
since Aug 2022
Widgets
Wheelio
since Sep 2021
Top search keywords
| Keyword | Position | Est. monthly visits |
|---|---|---|
| opensafely | #1 | 9 |
| exercise pegasus | #3 | 4 |
| operation pegasus | #43 | 2 |
| pegasus uk | #8 | 1 |
| pegasus 2025 september | #9 | 1 |
| covid vaccine prostate cancer | #33 | 0 |
| covid 19 psa | #17 | 0 |
| vaccine psa | #68 | 0 |
| open secure | #47 | 0 |
| pegasus red | #32 | 0 |
| prostate cancer covid vaccine | #28 | 0 |
| project protects study | #98 | 0 |
| prostate cancer and covid vaccine | #18 | 0 |
| psa 182 faces of death | #36 | 0 |
| medicalnewstoday logo | #79 | 0 |
| electronic health records analytics | #46 | 0 |
| data for nhs | #48 | 0 |
The site's top keywords in Google (US), with the visits each one is estimated to bring per month.
Top backlinks
Top links pointing at the site, one per source domain, strongest first. The anchor text opens the page carrying the link.
Audience
United Kingdom
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
5.32 / 10 · ranked #187,123 of all domains
173 referring domains · OpenPageRank
Search traffic
17 est. monthly organic visits (US)
17 keywords in Google's top 30
Core Web Vitals
| LCP | 0.7 s |
| INP | 25 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: English (United Kingdom)
- CDN: Cloudflare
- Weight: 0.8 MB · 26 requests
- WordPress theme: opensafely · all themes
- Structured data: OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| www.opensafely.org | 14 |
| opensafely.org | 10 |
| docs.opensafely.org | 9 |
| codelists.opensafely.org | 8 |
| jobs.opensafely.org | 8 |
| reports.opensafely.org | 6 |