Technology · Web server extensions
239,371 websites in the live index use OpenSSL as of October 2026. Download the full list of OpenSSL websites with website, company, country and language.
SourceAs of October 28, 2026, TechLeads detects OpenSSL on 239,371 websites: 87.4% of Web server extensions detections, the 1st most-used of 12 Web server extensions technologies we track. Used by 1 of the top 1,000 ranked websites using OpenSSL.
Sample results for OpenSSL. Description is shown under each title.
| Rank | Website | Title · Description | Company | Country | Language |
|---|---|---|---|---|---|
| #1,000 | calculator.net | Calculator.net: Free Online Calculators - Math, Fitness, Finance, ScienceOnline calculator for quick calculations, along with a large collection of calculators on math, finance, fitness, and more, each with in-depth information. | - | - | en |
| #3,812 | dmarc.org | dmarc.org – Domain Message Authentication Reporting & Conformance | Dmarc | US | en-US |
| #4,098 | tug.org | TeX Users Group (TUG) | - | - | - |
| #5,000 | deine-tierwelt.de | Deine Tierwelt Club: die App für Dich und Dein HaustierSichere Dir alle Vorteile des Clubs für Dein Haustier – online oder in der App: ✓ Ernährung ✓ Telemedizin ✓ Versicherung. Jetzt informieren & registrieren! | - | DE | de |
| #5,000 | mapquest.com | US Water Taxi Service, 60 Berth, San Pedro, CA 90731, US - MapQuestGet more information for US Water Taxi Service in San Pedro, CA. See reviews, map, get the address, and find directions. | - | - | en |
| #5,000 | warcraftlogs.com | Warcraft Logs - Combat Analysis for WarcraftWelcome to Warcraft Logs, a Web site that provides combat analysis for Blizzard's World of Warcraft MMO. Record your combats, upload them to the site and analyze them | Archon | - | en |
| #5,000 | jio.com | Buy JioHome 5G Online for High-Speed ConnectivityDiscover the power of JioBook – your ultimate companion for unrivaled connectivity, productivity, and entertainment. Explore cutting-edge features and seamless experiences on Jiobook.com. | - | - | - |
| #5,000 | internetdownloadmanager.com | Internet Download Manager is a powerful download acceleratorInternet Download Manager (IDM) is a tool to increase download speeds by up to 10 times, resume or schedule downloads and download streaming videos | - | - | - |
| #5,000 | sdpay.co.in | SDPAY | - | - | - |
| #5,824 | varnish-cache.org | Varnish HTTP Cache — Varnish HTTP Cache | Varnish Cache | - | en |
| #6,991 | fourmilab.ch | Fourmilab | - | - | - |
| #7,749 | linuxfromscratch.org | Welcome to Linux From Scratch! | - | - | - |
| #8,140 | skemman.is | Heim | Skemman | - | - | - |
| #8,226 | lwn.net | Welcome to LWN.net [LWN.net] | - | - | - |
| #8,724 | byjus.com | BYJU'S Online learning Programs For K3, K10, K12, NEET, JEE, UPSC & Bank ExamsBYJU | - | - | - |
| #9,365 | sendy.co | Sendy - Send Newsletters 100x cheaper via Amazon SESA self hosted newsletter application that lets you send trackable emails via Amazon Simple Email Service (SES) at 100x cheaper than other hosted solutions. | - | - | - |
| #10,000 | juntadeandalucia.es | Agencia de Medio Ambiente y Agua de Andalucía - Junta de AndalucíaSitio web de la Agencia de Medio Ambiente y Agua de Andalucía. Descubre a qué se dedica y los servicios que te ofrece. | - | ES | es |
| #10,000 | jtb.co.jp | 旅行予約はＪＴＢ！│安心と信頼の旅行ツアーほか海外・国内の総合旅行予約サイト旅行予約はＪＴＢ！安心と信頼の海外ツアー「ルックＪＴＢ」や、高級ホテル・旅館から格安プランまで揃った国内ツアー「エースＪＴＢ」のほか、格安航空券やオプショナルツアー、レストラン予約まで。旅を楽しくする多彩なラインナップが満載！ | JTB | JP | ja |
| #10,000 | vozpopuli.com | Vozpópuli - Noticias de última hora y actualidadVozpópuli, diario digital independiente y liberal, con las últimas noticias de actualidad sobre empresas, economía, política, ciencia y cultura en España. | - | - | es |
| #10,000 | spitogatos.gr | Greek Real Estate - Property in Greece | SpitogatosΔες 600.000+ αγγελίες για κατοικίες, επαγγελματικούς χώρους και οικόπεδα στην Ελλάδα από μεσιτικά γραφεία, κατασκευαστές και ιδιώτες στο Spitogatos.gr! | Spitogatos | GR | en |
| #10,000 | firstcry.com | Baby Products Online India: Newborn Baby Products & Kids Online Shopping at FirstCry.comFirstCry.com - India | - | - | en |
| #10,000 | bhajanganga.com | भजन गंगा - Bhajan Gangalisten to and watch devotion songs (Bhajans) with full lyrics in hindi text https://bhajanganga.com/ | - | - | - |
| #10,000 | kyoteibiyori.com | ボートレース日和(旧競艇日和)〜データ分析決定版サイト〜着々とボートレース（競艇）のファンに支持されているボートレースデータ決定版サイト「ボートレース日和」!欲しいデータをすべてここにあります。ボートレース日和(旧競艇日和)はスマホの一画面にあなたの欲しいデータをカスタマイズ表示させることにこだわったサイトです。予想スタイルは人それぞれ。ボートレース日和(旧競艇日和)はあなたと共に手のひらサイズで進化し続けます。ボートレース好きのＩＴ屋だからこそのスピード感とかゆいところに手が届くデータの種類には自信があります。一匹狼のようなクレバーな予想にも仲間との予想トークにもぜひお役立てくださいね。 | - | - | - |
| #10,000 | drevostavitel.cz | Dřevostavby a bydlení | nezávislý portál DřevostavitelVyberte si mezi projekty rodinných domů dřevostavby s variantou na klíč nebo hrubá stavba. Filtrujte podle ceny, dispozice, bungalov nebo na patro. | - | - | - |
| #10,000 | gigasena.com.br | GIGA-SENA | Notícias das LoteriasNotícias, informações e divulgação dos resultados das loterias dos sorteios dos concursos da Mega Sena, Lotofácil, Quina, Lotomania, Dupla Sena, Timemania, Dia de Sorte, Super Sete e +Milionária. | - | - | - |
Complete OpenSSL website dataset in CSV. One-time purchase.
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The most-used Web server extensions technologies in the TechLeads index, by number of websites. OpenSSL accounts for 87.4% of Web server extensions detections (239,371 websites).
TechLeads scans public websites and identifies OpenSSL from signals in the page HTML, scripts, cookies, HTTP headers and DNS records. Website counts refresh daily; this page uses data from October 28, 2026. Counts only include websites we have scanned, so they can differ from other providers.
The TechLeads live index currently lists 239,371 websites using OpenSSL. Open the sample table on this page or download the lead list.
The chart on this page is monthly HTTP Archive crawl detections for OpenSSL, compared with other Web Server Extensions technologies. It is not the TechLeads live index.
In the same HTTP Archive category, OpenSSL is charted against Engintron, mod_ssl, mod_perl, mod_jk, mod_wsgi. Live-index co-occurrence on this page is a separate signal.
Companies and websites using OpenSSL in the TechLeads index include calculator.net, dmarc.org, tug.org, deine-tierwelt.de, mapquest.com. The full list of 239,371 websites, with company name, country and language, is available as a CSV export.
By number of websites in the TechLeads index, the most-used Web server extensions alternatives to OpenSSL are mod_ssl (7,041), mod_perl (6,531), mod_jk (6,401).
TechLeads scans public websites and matches OpenSSL by signals in the page HTML, scripts, cookies, HTTP headers and DNS records. Website counts refresh daily.
| 2,051 |
| 0.75% |
| 07 | mod_rack | 2,051 | 0.75% |
|---|
| 08 | Shelf | 1,301 | 0.48% |
|---|
Yes. A one-time OpenSSL dataset is $29 as a CSV. The Growth plan ($79/mo) covers 10 technologies with recurring exports, alerts and API access.
Top-ranked sites on OpenSSLRank
Monthly detections of OpenSSL in the HTTP Archive crawl. This is historical crawl coverage, not the TechLeads live website index.
Same HTTP Archive category (Web Server Extensions), not the whole web. Toggle competitors on or off.
Optional rank bands from the crawl (top 1k through long tail). Missing months are crawl gaps, not uninstalls.
Technologies most frequently detected on the same websites as OpenSSL. Counts are websites in the live index.
Sites where we first detected OpenSSL, by week (UTC, weeks start Monday). These are newly detected sites, and the counts follow our discovery coverage.
14,428
sites newly detected in the last 12 weeks
The OpenSSL Project is a collaborative effort to develop a robust, commercial-grade, full-featured, and Open Source toolkit implementing the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) protocols as well as a full-strength general purpose cryptography library.
Our comprehensive database contains 239,371 websites using OpenSSL, making it the most complete OpenSSL sites list available. This OpenSSL customer websites directory helps businesses detect websites using OpenSSL and identify potential leads.
Websites using OpenSSL commonly also use Apache HTTP Server, PHP, jQuery, Google Analytics, Google Font API — reflecting typical OpenSSL technology stacks.
Our OpenSSL technology detection system scans millions of websites to identify those powered by OpenSSL. This list of sites with OpenSSL includes detailed information such as company names, contact details, social media profiles, and website rankings. Whether you're looking for top websites with OpenSSL or exploring OpenSSL adoption trends, our database provides comprehensive insights.
Each entry in our OpenSSL sites list includes valuable data points: domain name, global ranking, company information, contact details, social media links. This makes it easy to detect websites using OpenSSL and reach out to potential customers or partners.
Get instant access to the full list of sites with OpenSSL in CSV format. Our dataset includes all 239,371 OpenSSL customer websites with complete contact information, perfect for lead generation, market research, and competitive analysis. The data is regularly updated to ensure accuracy and includes the latest OpenSSL powered websites.
