OpenSSL 4.x icon

Websites using OpenSSL 4.x

OpenSSL is a software library for applications that secure communications over computer networks against eavesdropping or need to identify the party at the other end.

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851 live OpenSSL 4.x sites, ready to export.

That's how many OpenSSL 4.x websites are in VersionDB right now, each with its full tech stack, contact details, and social profiles.

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Every OpenSSL 4.x website we detected in the United States.

Only sites where a personal, company-hosted email was found.

Sites with at least one personnel LinkedIn profile.

Start with the highest-traffic end of the dataset.

Limit results to OpenSSL 4.x websites on .com domains.

Only sites where an organisation phone number was found.

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Versions

Which OpenSSL 4.x versions are most used?

We could read a version number on 100% of OpenSSL 4.x sites. Of those, the most common are OpenSSL 4.0.0, on 548 sites, OpenSSL 4.0.1, on 301 sites and OpenSSL 4.0.2, on 2 sites.

64% on v4.0.0
Versions detected
3
Sites with a version
851
Share of sites by version
v4.0.0 64% v4.0.1 35% v4.0.2 <1%

How many websites use OpenSSL 4.x?

We found OpenSSL 4.x on 851 websites in our September 2026 crawl, across 16 countries.

Which countries use OpenSSL 4.x the most?

By number of websites, the top countries are United States (81%, 691 sites), Italy (10%, 89 sites), France (4%, 31 sites), Canada (2%, 14 sites) and Spain (under 1%, 4 sites). Together they account for 97% of the 851 OpenSSL 4.x sites we track. 75% of the sites are in English, and .com is the most used domain ending, on 65% of them.

Where are OpenSSL 4.x websites hosted?

The networks carrying the most OpenSSL 4.x sites are Brownrice Internet, Inc. (642 sites), Playnet S.R.L. (86 sites) and HIVELOCITY, Inc. (33 sites).

What technologies are used with OpenSSL 4.x?

Across the 851 OpenSSL 4.x sites we track, the technologies most often found alongside it are Apache HTTP Server (100%, 851 sites), HSTS (92%, 781 sites), PHP (89%, 754 sites), Perl (85%, 725 sites) and mod_perl (85%, 725 sites).

Deep Dive

Breakdown of OpenSSL 4.x websites

What else they run, plus their language, hosting network, domain extension and country.

FAQ

Answers drawn from our latest crawl of OpenSSL 4.x websites. Anything else, email us and we will look it up.

Through our own crawl, which checks each site's HTML, scripts and headers rather than relying on self-reported data.