Connect Hunter to your favorite AI application

Websites using HSTS

772,273 websites detected · Updated Oct 31, 2026

What is HSTS?

HSTS is a technology in the Security category. 772,273 websites use HSTS, detected by Hunter on Oct 31, 2026.

Create a free account

The websites using HSTS

A sample of the websites Hunter detects HSTS on, ordered by web popularity.

Domain name Industry
1
messenger.com
- 22 email addresses
2
wordpress.org
Technology, Information and Internet 172 email addresses
3
cloudflare.com
Computer and Network Security 421 email addresses
4
github.com
Software Development 4,643 email addresses
5
cdnjs.com
IT Services and IT Consulting 1 email address
Show more

You have 772,273 sites. Now reach the people.

Hunter already holds email addresses at all 50 websites listed above.

  • Matthew M. · Entrepreneur WordPress

    99%

  • Anish P. · Head Of Sales Cloudflare

    84%

  • Alaine N. · Director of Events GitHub

    85%

Real people at the websites listed above. Only the part before the @ is hidden here — the company domain is the real one.

Create a free account

Free plan: 25 domain searches a month. No credit card.

Who uses HSTS

Websites running HSTS, counted by industry and by country. Only the largest groups are shown.

By industry

Industry Websites
Professional Services 72,836
Technology, Information and Media 65,307
Manufacturing 38,529
Retail 30,928
Consumer Services 23,853
Entertainment Providers 23,176
Financial Services 17,561
Accommodation Services 16,183
Hospitals and Health Care 15,992
Education 14,706
Administrative and Support Services 12,512
Government Administration 11,717

By country

Country Websites
United States 205,987
United Kingdom 41,359
Germany 39,961
France 27,550
Canada 24,489
Netherlands 19,264
Australia 12,938
Switzerland 10,131
Spain 9,217
India 7,787
Brazil 6,693
Sweden 6,051

HSTS by country

The countries where we detected enough HSTS websites to rank them.

HSTS FAQs

Browse every technology

Hunter detects HSTS on 772,273 websites. The figure comes from Hunter's own crawl of company websites and is rebuilt every night, so it moves as sites adopt and drop the technology.

The table on this page is a sample of the websites running HSTS, ordered by web popularity, with the industries they are in and how many email addresses Hunter holds for each. Create a free account to search any of them and see the addresses.

The websites Hunter detects HSTS on most often also run jQuery, HTTP/3 and PHP.

HSTS is one of the Security technologies Hunter tracks. Others it detects widely include Cloudflare Bot Management, Sucuri and DDoS-Guard.

Yes — that is what Hunter is for. The last column of the table shows how many email addresses Hunter already holds for a website, where it has found any. Sign up to see the addresses themselves, with the name and job title of the person behind each one.
We use cookies
We use cookies to analyze how Hunter's website is used and personalize your experience. Learn more
Opt-out