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Websites using OpenSSL

17,836 websites detected · Updated Oct 24, 2026

What is OpenSSL?

OpenSSL is a technology in the Authentication Services category. 17,836 websites use OpenSSL, detected by Hunter on Oct 24, 2026.

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The websites using OpenSSL

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

Domain name Industry
1
cloudflare.com
Computer and Network Security 393 email addresses
2
godaddy.com
Technology, Information and Internet 2,524 email addresses
3
amazon.co.jp
Software Development 672 email addresses
4
ibm.com
IT Services and IT Consulting 195,838 email addresses
5
bloomberg.com
Financial Services 178 email addresses
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You have 17,836 sites. Now reach the people.

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

  • Anish P. · Head Of Sales Cloudflare

    84%

  • Diana D. · HR Director GoDaddy

    99%

  • Chris M. · Independent Contractor Amazon

    84%

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

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Who uses OpenSSL

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

By industry

Industry Websites
Professional Services 1,275
Technology, Information and Media 1,229
Manufacturing 587
Education 445
Consumer Services 414
Entertainment Providers 342
Government Administration 296
Retail 266
Financial Services 244
Hospitals and Health Care 234
Administrative and Support Services 230
Accommodation Services 215

By country

Country Websites
United States 3,266
United Kingdom 591
Germany 464
Canada 451
Japan 416
India 285
France 284
Netherlands 257
Spain 229
Russia 213
Brazil 211
Norway 193

OpenSSL by country

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

Hunter detects OpenSSL on 17,836 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 OpenSSL, 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 OpenSSL on most often also run Apache HTTP Server, PHP and jQuery.

OpenSSL is one of the Authentication Services technologies Hunter tracks. Others it detects widely include reCAPTCHA, Gravatar and Google Sign-in.

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.
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