- 283 websites profiled in 10 groups.
- Highest score on the list: instagram.com at 100/100.
- Data: MrKeyword's web graph (August–October 2026), imported 31 October 2026.
Which SEO and marketing tools have the highest domain authority?
Among SEO and marketing tools on this list, mailchimp.com has the highest Link Authority, 72/100, with 301,763 linking domains. 36 sites in this group are profiled.
SEO and marketing tools by Link Authority
| Website | Link Authority | Web graph rank | Linking domains |
|---|---|---|---|
| seroundtable.com | 58 | #2,752 | 9,748 |
| screamingfrog.co.uk | 55 | #4,215 | 13,273 |
| brightedge.com | 55 | #4,673 | 7,865 |
| answerthepublic.com | 55 | #4,686 | 13,267 |
| rankmath.com | 54 | #5,090 | 10,567 |
| conductor.com | 54 | #5,389 | 4,388 |
| seranking.com | 54 | #5,874 | 9,726 |
| surferseo.com | 53 | #6,420 | 10,245 |
| keywordtool.io | 52 | #7,422 | 6,948 |
| mangools.com | 50 | #10,895 | 4,004 |
| majestic.com | 50 | #11,604 | 5,972 |
| sistrix.com | 49 | #14,705 | 3,270 |
| spyfu.com | 48 | #15,519 | 5,581 |
| serpstat.com | 48 | #16,972 | 3,487 |
| seobility.net | 47 | #20,012 | 3,233 |
| marketmuse.com | 47 | #20,606 | 3,265 |
| clearscope.io | 47 | #20,616 | 3,363 |
| woorank.com | 46 | #25,021 | 4,072 |
| accuranker.com | 44 | #35,823 | 1,245 |
| sitebulb.com | 43 | #40,375 | 1,737 |
| botify.com | 43 | #41,269 | 1,290 |
| ubersuggest.com | 43 | #46,381 | 539 |
| keyword.com | 38 | #106,438 | 779 |
| wincher.com | 38 | #110,189 | 596 |
Which software companies have the highest domain authority?
Among software and business apps on this list, apple.com has the highest Link Authority, 84/100, with 2,526,600 linking domains. 34 sites in this group are profiled.
Software and business apps by Link Authority
| Website | Link Authority | Web graph rank | Linking domains |
|---|---|---|---|
| docusign.com | 58 | #2,668 | 10,531 |
Which open-source and developer sites have the highest domain authority?
Among open source and developer sites on this list, github.com has the highest Link Authority, 86/100, with 792,509 linking domains. 38 sites in this group are profiled.
Open source and developer sites by Link Authority
| Website | Link Authority | Web graph rank | Linking domains |
|---|---|---|---|
| heroku.com | 58 | #2,487 | 8,717 |
| ruby-lang.org | 57 | #3,307 | 6,787 |
Which shopping, travel and payment sites have the highest domain authority?
Among shopping, travel and payments on this list, amazon.com has the highest Link Authority, 79/100, with 1,225,528 linking domains. 23 sites in this group are profiled.
Shopping, travel and payments by Link Authority
| Website | Link Authority | Web graph rank | Linking domains |
|---|---|---|---|
| homedepot.com | 59 | #2,291 | 37,141 |
| expedia.com | 55 | #4,784 | 20,649 |
| wayfair.com | 53 | #6,621 | 14,915 |
| costco.com | 52 | #7,889 | 15,532 |
Which search engines have the highest domain authority?
Among search engines and portals on this list, yandex.ru has the highest Link Authority, 80/100, with 986,389 linking domains. 9 sites in this group are profiled.
Search engines and portals by Link Authority
| Website | Link Authority | Web graph rank | Linking domains |
|---|---|---|---|
| ecosia.org | 50 | #12,432 | 9,467 |
Which government sites have the highest domain authority?
Among government and international bodies on this list, miit.gov.cn has the highest Link Authority, 81/100, with 695,218 linking domains. 20 sites in this group are profiled.
Government and international bodies by Link Authority
| Website | Link Authority | Web graph rank | Linking domains |
|---|---|---|---|
| nhs.uk | 40 | #73,273 | 1,589 |
Which websites are the most linked under each domain ending?
MrKeyword lists the most-linked websites under 11 country domains and .edu, .gov and .org, each ranked by linking domains in MrKeyword's web graph (August–October 2026). The most-linked site across these lists is wordpress.org (.org), with 2,780,782 linking domains. Each list shows up to 100 registered domains and leaves out infrastructure such as CDNs, script hosts and link shorteners.
Most-linked websites by domain ending
| List | Most-linked website | Domains in the top 2 million |
|---|---|---|
| Most-linked .ca websites | canada.ca | 19,087 |
| Most-linked .co.uk websites | bbc.co.uk | 33,347 |
| Most-linked .in websites | amazon.in | 13,095 |
| Most-linked .com.au websites | smh.com.au | 14,945 |
| Most-linked .de websites | google.de | 93,796 |
| Most-linked .fr websites | cnil.fr | 30,865 |
| Most-linked .nl websites | jwwb.nl | 29,630 |
| Most-linked .es websites | google.es | 11,052 |
| Most-linked .it websites | google.it | 20,976 |
| Most-linked .jp websites | hatena.ne.jp | 42,673 |
| Most-linked .br websites | www.gov.br | 19,707 |
| Most-linked .edu websites | harvard.edu | 4,133 |
| Most-linked .gov websites | nih.gov | 4,249 |
| Most-linked .org websites | wordpress.org | 181,505 |
How are Link Authority scores spread across the web?
The median of the 134,979,706 domains in MrKeyword's web graph (August–October 2026) has a Link Authority of 4, and the top 1% score 25 or more. What a good domain authority score is sets out the full distribution: score bands, percentiles, linking domains by score and the split by domain ending.
What is Link Authority and how is it calculated?
Link Authority is MrKeyword's 0–100 score for how strongly the rest of the web links to a domain. It is calculated one of two ways. Where MrKeyword has seen links to a domain from at least 10 different domains, the score is MrKeyword's own PageRank over its link graph (the links it has seen plus its web graph), log-scaled against the strongest domain. Otherwise it places the domain's PageRank position in MrKeyword's web graph (August–October 2026) on a log curve, so the strongest domain scores 100.
- Web-graph score = 100 × (1 − ln(rank) ÷ ln(domains in the graph)), rounded, where rank is the domain's PageRank position among the 134,979,706 domains of the current release.
- Own score = 100 × ln(N × PR) ÷ ln(N × PRmax), rounded and floored at 0, where PR is the domain's PageRank (damping 0.85) over followed cross-domain links, N is the number of domains in the graph and PRmax is the strongest domain's PageRank. Links from suspected link farms count at a tenth of their weight.
Both curves are logarithmic, so moving from 80 to 90 takes far more new linking domains than moving from 20 to 30. A score describes links, not traffic or quality, and is most useful for comparing sites in the same market.
Not Moz DA or Ahrefs DR. Link Authority is MrKeyword's own metric, built from MrKeyword data. Moz Domain Authority and Ahrefs Domain Rating use their own link indexes and formulas, so the three numbers are not interchangeable. What domain authority is and how the scores differ explains the three.
To raise your own, read how to increase domain authority, and for the very top of the web see the most-linked websites of 2026.
Where does this data come from?
Every profile reads MrKeyword's web graph (August–October 2026), MrKeyword's own domain-level link graph built from public web crawl data and covering 134,979,706 domains, plus MrKeyword's own PageRank where it has seen enough links to a site. Profiles are refreshed when MrKeyword imports a new release. Linking-domain counts are what MrKeyword has measured, not a claim about every link on the web, and links seen only in a customer's workspace are never published. Link Authority is labelled Derived: it is calculated from measured link data with the formulas above.
Why is a website missing from this list?
The list is hand-picked from well-known public websites, and a profile is published only when the site has a score and at least 500 linking domains in MrKeyword's data. It is never built from what MrKeyword users look up. For any other domain, including your own, use the free domain authority checker: up to 5 domains at once with no sign-up. To see which websites link to any domain, use the free backlink checker. Each profile also offers a free embeddable badge that shows the site's current Link Authority.