What powers unpaywall.org?
Last seen Jun 2026 · 32 technologies across 15 categories
Analytics
Intercom
since Jun 2020
CDN
Cloudflare
since Feb 2025
jsDelivr
since Jul 2020
Font scripts
Google Font API
since Jan 2019
JavaScript frameworks
JavaScript libraries
Miscellaneous
PaaS
Amazon Web Services
since Aug 2020
Heroku
since Aug 2020
Payment processors
Programming languages
Reverse proxies
Envoy
since Feb 2023
Security
Cloudflare Bot Management
since Feb 2025
HSTS
since Feb 2023
UI frameworks
Vuetify
since Feb 2021
Web frameworks
Express
since Jan 2019
Ruby on Rails
since Feb 2023
Web servers
Cowboy
since Jan 2019
Webmail
Google Workspace
since Aug 2022
Top search keywords
| Keyword | Position | Est. monthly visits |
|---|---|---|
| chrome web store | #61 | 630 |
| chrome ext | #21 | 460 |
| chromebook extensions | #42 | 420 |
| extension | #19 | 410 |
| jstor | #75 | 350 |
| download firefox browser | #62 | 230 |
| sci-hub | #61 | 210 |
| chrome plugin store | #59 | 190 |
| google extensions | #62 | 160 |
| google ext | #41 | 160 |
| firefox extensions | #16 | 140 |
| scholarly journals database | #9 | 110 |
| free articles | #4 | 110 |
| paywall remover | #97 | 100 |
| unpaywall extension | #1 | 97 |
| remove paywall | #98 | 85 |
| firefox browser | #39 | 85 |
| academic article database | #12 | 74 |
| how to get free articles | #1 | 52 |
| how to find free articles | #1 | 52 |
| unpaywall articles | #2 | 42 |
| free research articles | #2 | 34 |
| unpaywall chrome extension | #1 | 33 |
| unblock website browser | #84 | 31 |
| how to get article for free | #2 | 28 |
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
- 82% desktop
- 17% phone
- 1% tablet
Vietnam
Hong Kong SAR China
Nigeria
Morocco
Algeria
United States
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
7.07 / 10 · ranked #34,875 of all domains
786 referring domains · OpenPageRank
Search traffic
6,200 est. monthly organic visits (US)
2,505 keywords in Google's top 30
Core Web Vitals
| LCP | 4.3 s |
| INP | 100 ms |
| CLS | 0.05 |
| TTFB | 900 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Weight: 4.2 MB · 20 requests
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| support.unpaywall.org | 17 |
| journals.unpaywall.org | 13 |
| www.unpaywall.org | 13 |
| unpaywall.org | 11 |