The .org domain extension is home to some of the most recognisable websites on the internet.

• Wikipedia uses it to make knowledge freely available.

• WordPress.org distributes the software that powers millions of websites.

• Organisations such as the United Nations, UNICEF and the Red Cross use .org domains to communicate their missions and reach supporters.

The extension has grown far beyond its original association with traditional nonprofit organisations.

In June 2026, Public Interest Registry reported that the number of registered .org domains had passed 12 million worldwide.

That’s a great domain registrations milestone for any registry

Below are 50 popular websites using a .org domain, what they do and what you can learn from them when choosing a domain for your own organisation.

Is this an exact ranking of the biggest .ORG websites?

Not quite.

There is no official, continuously updated list ranking only websites that end in .org. Website popularity can also be measured in different ways, including:

• Monthly website visits

• Unique visitors

• Page views

• Search visibility

• DNS requests

• Direct and referral traffic

• Geographic reach

Traffic platforms can therefore produce different rankings for the same websites.

For example, Tranco creates a research-oriented ranking by combining website rankings from several providers and averaging results over 30 days.

Similarweb, on the other hand, estimates popularity using traffic and engagement data.

The list below should therefore be treated as a collection of the most popular, influential and widely recognised .org websites, rather than a fixed traffic leaderboard.

Top 50 popular websites using a .ORG domain

Website	Organisation or project	What the website is used for
1) Wikipedia.org	Wikipedia	Free online encyclopaedia
2) Craigslist.org	Craigslist	Classified advertisements
3) Archive.org	Internet Archive	Archived websites, books, audio and video
4) WordPress.org	WordPress	Open-source website-building software
5) Wikimedia.org	Wikimedia Foundation	Infrastructure for Wikimedia projects
6) JW.org	Jehovah’s Witnesses	Religious publications and information
7) Mozilla.org	Mozilla Foundation	Firefox and open-web projects
8) Coursera.org	Coursera	Online courses and professional certificates
9) KhanAcademy.org	Khan Academy	Free educational lessons
10) Change.org	Change.org	Online petitions and campaigns
11) ChurchofJesusChrist.org	The Church of Jesus Christ of Latter-day Saints	Religious information and resources
12) OpenStreetMap.org	OpenStreetMap	Community-created maps
13) arXiv.org	arXiv	Academic and scientific research papers
14) TED.org	TED	Educational talks and ideas
15) Python.org	Python Software Foundation	Python downloads and documentation
16) FreeCodeCamp.org	freeCodeCamp	Free programming education
17)edX.org	edX	University and professional online courses
18) NPR.org	National Public Radio	News, podcasts and public radio
19) PBS.org	Public Broadcasting Service	Public television and educational content
20) W3.org	World Wide Web Consortium	Standards for the World Wide Web
21) JSTOR.org	JSTOR	Academic journals, books and research
22) Gutenberg.org	Project Gutenberg	Free public-domain ebooks
23) Wiktionary.org	Wikimedia community	Collaborative online dictionary
24) Wikidata.org	Wikimedia Foundation	Open structured knowledge database
25) UN.org	United Nations	International cooperation and UN information
26) WorldBank.org	World Bank	Development research and economic data
27) IMF.org	International Monetary Fund	Economic research and financial information
28)UNICEF.org	UNICEF	Children’s rights and humanitarian programmes
29) RedCross.org	American Red Cross	Emergency assistance and disaster response
30) MayoClinic.org	Mayo Clinic	Medical and health information
31) ClevelandClinic.org	Cleveland Clinic	Healthcare services and medical information
32) KidsHealth.org	Nemours Children’s Health	Health information for children and families
33) Code.org	Code.org	Computer science education
34) Apache.org	Apache Software Foundation	Open-source software projects
35) Kernel.org	Linux Kernel Archives	Linux kernel development and downloads
36) Debian.org	Debian Project	Debian Linux distribution
37) GNU.org	GNU Project	Free and open-source software
38) LinuxFoundation.org	Linux Foundation	Support for open-source projects
39) CreativeCommons.org	Creative Commons	Open-content copyright licences
40) LetsEncrypt.org	Let’s Encrypt	Free SSL certificates
41) EFF.org	Electronic Frontier Foundation	Digital privacy and internet rights
42)ICANN.org	ICANN	Coordination of the global domain-name system
43) IETF.org	Internet Engineering Task Force	Internet technical standards
44) Signal.org	Signal Foundation	Private messaging software
45) TorProject.org	Tor Project	Online privacy and anonymity technology
46) Blender.org	Blender Foundation	Open-source 3D creation software
47) GodotEngine.org	Godot Foundation	Open-source game engine
48) VideoLAN.org	VideoLAN	VLC media player and related projects
49) LibreOffice.org	The Document Foundation	Open-source office software
50) MetMuseum.org	Metropolitan Museum of Art	Art collections, exhibitions and education

1) Wikipedia.org

Wikipedia is one of the clearest examples of how powerful a .org domain can become.

The website provides millions of community-edited articles across hundreds of languages. Its domain communicates that the platform is built around public access to information rather than a conventional online store.

Similarweb ranked Wikipedia.org first in its dictionaries and encyclopaedias category and 12th globally in May 2026.

2) Craigslist.org

Craigslist is unusual because it operates a commercial classified-advertising platform while using a .org domain.

The website demonstrates an important point: .org is not legally restricted to charities or nonprofit organisations. Businesses, individuals and community projects can register the extension.

However, visitors generally associate .org with public service, community activity and mission-driven work. A purely commercial business should consider whether .com, .co.ke or .ke would communicate its purpose more clearly.

3) Archive.org

Archive.org is operated by the Internet Archive.

Its best-known service is the Wayback Machine, which allows you to view archived versions of websites. The organisation also preserves books, software, music, videos and other digital material.

The domain suits its role as a public digital library focused on preserving access to information.

4) WordPress.org

WordPress.org is the official home of the open-source WordPress software.

You can download WordPress, browse themes, install plugins, read documentation and participate in its community. It should not be confused with WordPress.com, which offers a commercially managed website-building service.

This distinction shows how two extensions can help separate an open-source project from a commercial service.

5) Wikimedia.org

Wikimedia.org supports the technical infrastructure behind Wikipedia and related projects.

These projects include Wiktionary, Wikidata, Wikimedia Commons and Wikibooks. Its use of .org reinforces the foundation’s educational and public-interest mission.

6) Mozilla.org

Mozilla.org is associated with Firefox and several projects intended to support an open and accessible internet.

The website provides browser downloads, product information, developer resources and details about Mozilla’s advocacy work.

7) Coursera.org

Coursera partners with universities and companies to provide online courses, professional certificates and degree programmes.

Its use of .org shows that the extension is not limited to traditional charities. Education platforms and mission-oriented companies may also choose it when community benefit is central to their identity.

8) KhanAcademy.org

Khan Academy provides free educational material covering mathematics, science, computing, economics and other subjects.

Its .org address is well aligned with its mission of making high-quality education available to learners around the world.

9) OpenStreetMap.org

OpenStreetMap is a collaborative map of the world.

Contributors add and update information about roads, buildings, businesses and physical locations. Developers can then use the mapping data in websites, applications and research projects.

10) arXiv.org

arXiv is a major repository for research papers in fields such as physics, mathematics, computer science, statistics and economics.

Researchers commonly publish early versions of papers on the platform before or during formal peer review.

11) Python.org

Python.org is the official website for the Python programming language.

It provides software downloads, documentation, tutorials, community updates and information about the Python Software Foundation.

12) FreeCodeCamp.org

freeCodeCamp helps people learn programming through interactive lessons, certifications, articles and practical projects.

The organisation has built a large international learning community around freely accessible technical education.

13) W3.org

W3.org is the website of the World Wide Web Consortium.

The consortium develops technical standards used across the web, including guidance related to HTML, CSS and web accessibility. Website developers frequently visit the domain for official specifications and technical references.

14) Gutenberg.org

Project Gutenberg distributes free electronic books whose copyrights have expired or whose owners have authorised free distribution.

It is one of the oldest digital-library projects and remains a valuable source of public-domain literature.

15) UN.org

UN.org is the main website of the United Nations.

It publishes information about peace and security, human rights, sustainable development, international law and humanitarian work.

The short domain is memorable, authoritative and closely matched to the organisation’s globally recognised name.

16) WorldBank.org

The World Bank uses its website to publish development data, research, project information and economic reports.

For students, journalists, policymakers and business researchers in Kenya, the website can be a useful source of statistics covering poverty, infrastructure, education and economic development.

17) UNICEF.org

UNICEF.org provides information about the organisation’s work for children, including healthcare, nutrition, education, clean water and emergency assistance.

The website also supports fundraising, reporting and public awareness campaigns.

18) RedCross.org

RedCross.org is operated by the American Red Cross.

The website provides disaster information, blood-donation resources, safety training and ways to contribute to emergency-response programmes.

19) MayoClinic.org

MayoClinic.org is one of the most widely recognised health-information websites.

It contains information about diseases, symptoms, medical tests, treatments and healthy living. Its reputation comes primarily from the organisation behind it and the quality of its information, not from the domain extension alone.

20) Let’s Encrypt.org

Let’s Encrypt provides free SSL certificates that help websites use HTTPS.

An SSL certificate encrypts information exchanged between a visitor’s browser and a website. Most hosting customers can install or activate one through their hosting control panel.

Why do so many major organisations use .ORG?

The .org extension was introduced as one of the internet’s original generic top-level domains.

It became strongly associated with nonprofit organisations, charities, open-source communities and public-interest projects. That association remains powerful even though registration is open to everyone.

Public Interest Registry, the organisation responsible for managing .org, confirms that the extension is open and unrestricted. You do not need to be a registered charity or an American 501(c)(3) organisation to register one.

It communicates purpose

A .org address can signal that a website is built around a cause, community, institution or shared mission.

Compare these hypothetical names:

• cleanafrica.org

• cleanafrica.store

• cleanafrica.agency

The first sounds like an environmental initiative. The second sounds like an online shop, while the third sounds like a commercial service provider.

The words on the website still matter, but the extension shapes a visitor’s first impression.

It is internationally recognised

Unlike country-specific extensions, .org is recognised across markets.

A Kenyan organisation that plans to operate in several countries may therefore prefer a .org address over a domain tied to one country.

For example:

• example.org can represent an international initiative.

• example.or.ke more clearly represents an organisation connected to Kenya.

Neither option is automatically better. The right choice depends on the people you want to reach.

It suits community projects

Many open-source tools, educational resources and collaborative projects use .org.

Examples include:

• Python.org

• WordPress.org

• Apache.org

• Debian.org

• Blender.org

• OpenStreetMap.org

These projects rely heavily on contributors and communities, making .org a natural fit.

It may offer more naming options

Many short .com names were registered years ago.

The matching .org name may still be available, especially when your name contains a distinctive organisation, project or community term.

Do not register the .org version of a famous company’s name. That could create a trademark dispute or make visitors think you are impersonating the company.

Who should register a .ORG domain?

A .org domain can work well for several types of websites.

Non-governmental organisations

NGOs can use .org for:

• Publishing programme information

• Receiving donations

• Recruiting volunteers

• Sharing annual reports

• Documenting community impact

• Publishing contact and office information

A Kenyan NGO may also consider .or.ke, particularly when most of its work and audience are in Kenya.

Charities and foundations

A charity website needs to communicate legitimacy and explain how contributions will be used.

A suitable website can include:

• Registration information

• Leadership details

• Financial reports

• Current projects

• Beneficiary stories

• Donation options

• Contact information

Using .org can support this positioning, but the extension does not prove that the charity is legitimate. Visitors should still verify the organisation and its claims.

Churches and religious organisations

A .org domain can work for a church, ministry, mosque, religious network or faith-based programme.

The website may contain service times, sermons, events, announcements, donation details and directions.

Schools and educational projects

Schools commonly use country-specific educational domains, but independent educational programmes may prefer .org.

Examples include:

• Free learning platforms

• Scholarship programmes

• Alumni associations

• Research initiatives

• Teacher communities

• Digital libraries

Kenyan universities and eligible academic institutions may also consider .ac.ke.

Professional associations

An industry or professional association can use .org to publish:

• Membership requirements

• Codes of conduct

• Industry standards

• Training opportunities

• Conferences

• Member directories

• Research reports

Open-source projects

The .org extension has a strong history within open-source software.

It is suitable when a project is centred on collaboration, public documentation and community participation rather than simply selling software subscriptions.

Advocacy campaigns

Environmental, human-rights, public-health and community campaigns can also use .org.

Before choosing the domain, think about whether the campaign is temporary or expected to become a long-term organisation. A good domain should continue making sense as the project grows.

Can a business use a .ORG domain?

Yes. Anyone can register a .org domain.

There is no general requirement that you must submit nonprofit registration documents before registering it. Public Interest Registry describes .org as an open and unrestricted domain.

The more important question is whether using it would make your business clearer or more confusing.

A .org domain may work for:

• A social enterprise

• A public educational resource

• A corporate foundation

• An open-source project

• A community operated by a business

• A professional membership body

It may be less suitable for:

• An ecommerce shop

• A restaurant

• A web-design agency

• A property company

• A conventional consulting business

• A commercial hosting company

For these businesses, .co.ke, .ke or .com will usually communicate commercial intent more clearly.

.ORG vs .OR.KE: Which should you choose in Kenya?

Both extensions can work for Kenyan organisations, but they communicate slightly different things.

Consideration	.ORG	.OR.KE
Geographic identity	International	Strongly connected to Kenya
Common use	Global organisations, communities and projects	Kenyan organisations
Recognition outside Kenya	Very high	More limited
Suitable for international expansion	Yes	Possible, but Kenya-focused
Name availability	Depends on the name	May offer more local options
Branding impression	Global and mission-driven	Local and organisational

Choose .org when your intended audience is international or when you want a globally recognised address.

Choose .or.ke when your work is primarily based in Kenya and a local identity is important.

Some organisations register both. One domain becomes the main website, while the other redirects visitors to it.

.ORG vs .COM

The difference is largely about positioning rather than registration eligibility.

.ORG	.COM
Commonly associated with organisations and causes	Commonly associated with businesses
Popular with nonprofits and open-source projects	Popular with shops, startups and companies
Can communicate community or public purpose	Can communicate commercial intent
Open for anyone to register	Open for anyone to register
Suitable for mission-led projects	Suitable for most commercial websites

A company can use .org, and a nonprofit can use .com. However, selecting the extension people expect can make your website easier to understand and remember.

Does a .ORG domain rank better on Google?

A .org extension does not automatically give a website better Google rankings.

In facr tlds have nothing to do with helping you rank on Google

Popular .org websites often rank well because they have:

• Useful and original content

• Strong reputations

• Links from authoritative websites

• Recognised experts and contributors

• Good technical performance

• Years of published information

• Clear editorial policies

• Strong brand recognition

Simply changing a weak website from .com to .org will not produce the same results.

Choose the extension that fits your identity, then invest in helpful content, technical SEO, website security and a good user experience.

How to choose a good .ORG domain name

The domain should be easy to remember, type and share.

a) Keep it short

Shorter domains are generally easier to communicate verbally and less likely to be mistyped.

Instead of:

kenyancommunityenvironmentalconservationinitiative.org

Consider a shorter brand name such as:

greenfuture.org

You will still need to check availability and possible trademark conflicts.

b) Avoid confusing spellings

A domain should not require a long explanation every time you mention it.

Be careful with:

• Unusual abbreviations

• Repeated letters

• Words with several common spellings

• Numbers replacing words

• Unnecessary hyphens

c) Make the purpose understandable

A descriptive word can help visitors understand the organisation.

Examples include:

• foundation

• community

• education

• health

• youth

• wildlife

• research

• relief

Do not force too many keywords into the name. A distinct, memorable brand is usually better than a long string of generic terms.

d) Check social-media availability

Before registering the domain, check whether closely matching usernames are available on the platforms your organisation intends to use.

Using a consistent name across your website and social accounts makes the organisation easier to recognise.

e) Check for trademark conflicts

Search for existing companies, products and organisations using the same or a confusingly similar name.

Registering an available domain does not automatically give you the legal right to use another organisation’s trademark.

f) Consider common misspellings

If your name is frequently misspelled, consider registering the most common variations and redirecting them to your primary domain.

This can help visitors who type the address incorrectly and reduce opportunities for impersonation.

What do you need after registering a .ORG domain?

A domain is the website’s address. It does not contain the website itself.

You will normally need several other services.

I) Web hosting

Web hosting stores your website’s pages, images, databases and files on a server.

For a small organisation website, shared hosting is often enough. A more demanding website may eventually require a VPS or another scalable hosting solution.

II) A website or content management system

WordPress is a common choice for organisations because it can support:

• Pages

• Blog posts

• Donation forms

• Event listings

• Volunteer forms

• Image galleries

• Reports

• Newsletters

• Member areas

You can also use a website builder when you need a simpler setup process.

Use AI Website Builder

III) Professional email

An address such as [email protected] looks more official than using a free personal email address.

You may create separate addresses for different responsibilities:

• [email protected]

• [email protected]

• [email protected]

• [email protected]

• [email protected]

Get Cheapest Business Emails

IV) An SSL certificate

SSL enables HTTPS and encrypts information exchanged between the website and its visitors.

This is particularly important when the website accepts passwords, donations, contact-form submissions or other personal information.

V) Backups and security

Organisation websites can be targeted by spam, malware and impersonation attempts.

Protect the website with:

• Strong, unique passwords

• Two-factor authentication

• Regular software updates

• Automated backups

• Limited administrator access

• Security monitoring

How to register a .ORG domain in Kenya

You can register a .org domain through Truehost by following these steps:

• Visit the Truehost domain-search page. or use instant domain search forms on this blog

• Enter the organisation or project name you want.

• Select .org from the available extensions.

• Review the registration and renewal price shown in the search results.

• Add the domain to your cart.

• Choose hosting or business email when required.

• Complete payment using one of the available payment methods.

• Connect the domain to your website.

Domain availability and prices can change, so rely on the live domain-search results before paying.

Lessons from the world’s biggest .ORG websites

The websites in this list serve very different audiences, but several patterns appear repeatedly.

The name is easy to recognise

Domains such as un.org, ted.org and python.org are short and closely match their brands.

A domain does not have to explain everything the organisation does. It needs to be memorable and difficult to confuse with another address.

The website offers a clear public benefit

Many successful .org websites provide information, tools, education, research or community services.

Examples include:

• Free knowledge from Wikipedia

• Archived information from the Internet Archive

• Programming documentation from Python.org

• Maps from OpenStreetMap

• Free certificates from Let’s Encrypt

The extension supports their positioning, but their usefulness is what attracts visitors.

Trust is supported by evidence

A .org address alone does not create trust.

Strong organisation websites publish information such as:

• Real contact details

• Leadership profiles

• Registration information

• Financial reports

• Programme results

• Funding disclosures

• Privacy policies

• Clear editorial standards

Their content is maintained

Outdated event pages, broken links and old contact details can make even a well-designed organisation appear inactive.

Assign someone to review important pages regularly and update the site when programmes, leadership or contact information changes.

.Org FAQs

What does .ORG mean?

The .org extension is derived from the word organisation.

It is commonly used by nonprofits, charities, associations, open-source projects, religious organisations and community initiatives.

Do you have to be a nonprofit to register .ORG?

No.

Public Interest Registry states that .org is open and unrestricted. Individuals, businesses and organisations can register it.

Is .ORG trustworthy?

Many respected institutions use .org, but the extension does not guarantee that every website using it is legitimate.

Before donating money or providing personal information, verify the organisation, its contact details and its registration claims.

Is .ORG only for American organisations?

No.

A .org domain can be registered and used by organisations in Kenya and other countries. It is a generic international extension rather than a country-specific domain.

Can a Kenyan NGO use .ORG?

Yes.

A Kenyan NGO can use .org, particularly when it works internationally or wants a globally recognisable address.

It can also consider .or.ke domain when a strong Kenyan identity is more important.

Which is better, .ORG or .OR.KE?

Choose .org for a more international identity.

Choose .or.ke when your organisation mainly operates in Kenya and wants its domain to communicate that local connection.

Register .or.ke domain

Can I use .ORG for an online store?

You can, but it may create the wrong expectation.

Customers generally expect online shops and commercial businesses to use extensions such as .com, .co.ke, .ke or .shop.

• .Store Domain

• .Shop domain

• .Biz domain

• .Top Domain

Does .ORG improve SEO?

Not automatically.

Search performance depends more on the quality of your content, reputation, backlinks, technical setup and user experience than on choosing .org instead of another common extension.

Can I transfer a .ORG domain?

Yes.

A .org domain can generally be transferred between registrars, subject to transfer rules such as domain locks and authorisation requirements.

Can I have email addresses with a .ORG domain?

Yes.

After registering the domain and activating an email-hosting service, you can create addresses such as [email protected] or [email protected].

Final thoughts

The world’s leading .org websites show that the extension can support far more than traditional charity websites.

It is used by:

• educational platforms,

• international institutions,

• health organisations,

• open-source communities,

• standards bodies,

• research repositories and public-interest projects.

The extension is open to everyone, but it works best when your name and website have a clear organisational, educational or community purpose.

Choose a short and memorable name, confirm that it does not conflict with an existing brand, and support it with a secure website, professional email and useful content.

You can search for and register an available .org domain through Truehost Kenya, then connect it to web hosting, WordPress or professional business email.