zotero.org

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zotero.org is ranked #5,088 in the Tranco list of the world's most popular websites (list of Oct 13, 2026), up 123 places in four weeks. The domain was registered on Aug 29, 2006, 20 years, 1 month ago, through Amazon Registrar, Inc., and is paid up until Aug 29, 2027. It is served through Amazon CloudFront by Apache.

Global rank

#5,088

▲ 21 this week

Domain age

20 years

since Aug 29, 2006

Technologies

detected on the homepage

SEO score

76/100

homepage checks

Popularity rank

#5,088 of the top 1 million sites in the Tranco research ranking, which averages several traffic and DNS sources over 30 days. Best rank in the period shown: #4,930.

Weekly Tranco rank (lower is more popular).

See where zotero.org sits in the top 10,000

Domain registration

Registered: Aug 29, 2006 (20 years, 1 month ago)
Expires: Aug 29, 2027
Registrar: Amazon Registrar, Inc.
Name servers: ns-1395.awsdns-46.org, ns-1678.awsdns-17.co.uk, ns-496.awsdns-62.com, ns-635.awsdns-15.net
DNSSEC: Not signed

From the registry's public RDAP record, checked Oct 1, 2026.

Technology stack

CDN

Amazon CloudFront

Web servers

Apache

Detected from the homepage HTML and response headers on Oct 14, 2026. Tools loaded only after scripts run (or after consent banners) may be missing.

Homepage SEO check

Checked from the HTML our scanner received on Oct 14, 2026. Content added later by JavaScript isn't counted.

76/100

https://www.zotero.org/

Zotero | Your personal research assistant

Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.

14 passed · 7 warnings · 2 failed

Content

✓Title41 characters
✓Meta description91 characters
!H1 heading2 H1 headings — use one
✓Subheadings7 H2 headings
✕Image alt text6 of 9 images have no alt text
✓Content lengthAbout 366 words

Indexing

✓IndexableNo noindex directive
!Canonical URLMissing
✓robots.txtFound
✓XML sitemapFound
✓Language attributeen
!Structured dataNo JSON-LD or microdata

Social sharing

✕Open GraphMissing
!Twitter / X cardMissing

Technical

✓HTTPSServed over HTTPS
✓Mobile viewportFound
!FaviconMissing
✓Character encodingutf-8

Security headers

✓Strict-Transport-SecuritySet
✓Content-Security-PolicySet
✓Clickjacking protectionSet
!X-Content-Type-OptionsNot set
!Referrer-PolicyNot set

Server response

Final URL: https://www.zotero.org/
HTTP status: 200
Server: Apache
Response time: 5.16 s (first byte 5.16 s, from our scanner in a US data centre)
HTML size: 44 KB
Compression: gzip

Sites ranked near zotero.org

Rank	Website	Registered	Built with
#5,083	ebay.fr	2008	Akamai
#5,084	dartmouth.edu	—	Drupal, Cloudflare, jQuery
#5,085	ble.ir	—	Next.js, React
#5,086	wedos.cz	2006	WordPress, jQuery, Google Tag Manager
#5,087	uky.edu	—	Drupal, Apache, Google Tag Manager
#5,089	ijg.org	1997	Apache
#5,090	larksuite.com	2018	Google Tag Manager, Intercom, Zendesk
#5,091	yolasite.com	2008	Cloudflare
#5,092	amplience.net	2017	—
#5,093	widgetable.net	2022	Amazon CloudFront, Nginx

Questions about zotero.org

How popular is zotero.org?

zotero.org is #5,088 worldwide in the Tranco list published Oct 13, 2026.

How old is zotero.org?

zotero.org was registered on Aug 29, 2006, which makes the domain 20 years, 1 month old.

What is zotero.org built with?

We detected Amazon CloudFront and Apache on its homepage.

Who is the registrar of zotero.org?

Amazon Registrar, Inc., according to the registry's RDAP record.