As of October 29, 2026, OpenSSL is used by 241,789 websites in the TechLeads index: 87.4% of all Web server extensions detections, the 1st most-used of 12 Web server extensions technologies.
Websites using each technology in the TechLeads index, and its share of all Web server extensions detections.
| # | Technology | Websites | Share |
|---|---|---|---|
| 1 | OpenSSL | 241,789 | 87.4% |
| 2 | mod_ssl | 7,132 | 2.6% |
| 3 | mod_perl | 6,589 | 2.4% |
| 4 | mod_jk | 6,479 | 2.3% |
| 5 | mod_wsgi | 4,295 | 1.6% |
| 6 | mod_dav | 2,816 | 1.0% |
| 7 | mod_rails | 2,077 | 0.75% |
| 8 | mod_rack | 2,077 | 0.75% |
| 9 | Shelf | 1,303 | 0.47% |
Rows link to each competitor's market share page where one exists. The table lists the 10 most-used technologies; ranks are by website count.
In HTTP Archive's monthly crawl of public websites, OpenSSL was detected on 352,832 pages in September 2026, down 27.5% from a year earlier (peak: 822,804). Among the 1,000 most-visited sites, it appeared on 4. HTTP Archive is a separate dataset from the TechLeads index, so its numbers are not added to ours.
Same month, other Web Server Extensions technologies in HTTP Archive: Engintron 26,986, mod_ssl 12,977, mod_perl 11,814, mod_jk 11,648, mod_wsgi 7,583.
See all 241,789 websites using OpenSSL or download the full list as a CSV for $29.
TechLeads scans public websites and detects OpenSSL from signals in the page HTML, scripts, cookies, HTTP headers and DNS records. Market share is OpenSSL's website count divided by the website counts of all Web server extensions technologies we track; a site using two Web server extensions tools counts for both. Counts were last refreshed on October 29, 2026 and update daily.
OpenSSL accounts for 87.4% of Web server extensions detections in the TechLeads index (241,789 websites), which makes it the 1st most-used of 12 Web server extensions technologies we track.
TechLeads currently detects OpenSSL on 241,789 websites. HTTP Archive's monthly crawl, a separate dataset, detected it on 352,832 pages in September 2026.
By number of websites, the largest Web server extensions technologies besides OpenSSL are mod_ssl (7,132), mod_perl (6,589), mod_jk (6,479), mod_wsgi (4,295), mod_dav (2,816).
Websites using OpenSSL include calculator.net, dmarc.org, tug.org, deine-tierwelt.de, mapquest.com, warcraftlogs.com. The full list of 241,789 websites can be exported as a CSV for $29.
| 10 | mod_fastcgi | 1,001 | 0.36% |
