Connect Hunter to your favorite AI application

Websites using OpenSSL

17,711 websites detected · Updated Oct 31, 2026

What is OpenSSL?

OpenSSL is a technology in the Authentication Services category. 17,711 websites use OpenSSL, detected by Hunter on Oct 31, 2026.

Create a free account

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 421 email addresses
2
godaddy.com
Technology, Information and Internet 2,543 email addresses
3
amazon.co.jp
Software Development 670 email addresses
4
ibm.com
IT Services and IT Consulting 195,961 email addresses
5
bloomberg.com
Financial Services 179 email addresses
Show more

You have 17,711 sites. Now reach the people.

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

  • Anish P. · Head Of Sales Cloudflare

    84%

  • Alexandra A. · Marketing 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.

Create a free account

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

Who uses OpenSSL

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

By industry

Industry Websites
Professional Services 1,266
Technology, Information and Media 1,223
Manufacturing 582
Education 437
Consumer Services 403
Entertainment Providers 339
Government Administration 295
Retail 263
Financial Services 241
Hospitals and Health Care 232
Administrative and Support Services 230
Accommodation Services 213

By country

Country Websites
United States 3,231
United Kingdom 588
Germany 458
Canada 450
Japan 412
India 283
France 279
Netherlands 256
Spain 228
Russia 214
Brazil 206
Norway 192

OpenSSL by country

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

Hunter detects OpenSSL on 17,711 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.
We use cookies
We use cookies to analyze how Hunter's website is used and personalize your experience. Learn more