Technology · Web servers
156 websites in the live index use H2O as of October 2026. Download the full list of H2O websites with website, company, country and language.
SourceAs of October 31, 2026, TechLeads detects H2O on 156 websites.
Sample results for H2O. Description is shown under each title.
| Rank | Website | Title · Description | Company | Country | Language |
|---|---|---|---|---|---|
| #25,517 | lowreal.net | 氾濫原 | - | - | - |
| #78,548 | psychonautwiki.org | Search - PsychonautWiki | - | - | en |
| #119,445 | peco-japan.com | PECO（ペコ）-【月間1,500万人】利用 国内最大級「ペット」情報・動画・画像サイトPECO（ペコ）は、ワンちゃん（犬）・ネコちゃん（猫）などのあらゆるペットの情報が集まるペット専門サイトです。【ペットとの毎日がもっと楽しくなる】をテーマに「おもしろ＆可愛い」ペット動画や、「癒し」「感動」の記事、「病気」「飼い方・しつけ」「里親」などのお役立ち記事までペットに関する様々な情報が満載です。その他にも、最新の「ペットイベント情報」や「おでかけスポット」、「人気ペット漫画」なども毎日配信しています。 | - | - | - |
| #153,656 | juusta.jp | ジュースタ｜柔道整復師国家試験対策アプリ現役柔整師が考えた最小努力で合格するための国家試験対策アプリ。 | - | - | - |
| #235,296 | dh-study.jp | シカスタ｜歯科衛生士国家試験対策アプリ超効率的学習を資格AI®︎がサポート！最小努力で歯科衛生士の国家試験を合格するための試験対策アプリです。 | - | - | - |
| #529,406 | tazawako-kakunodate.com | 【公式】田沢湖・角館観光協会 - 田沢湖・角館観光ガイド田沢湖・角館観光協会が運営する公式観光サイト田沢湖・角館・西木の観光ガイド。瑠璃色の田沢湖と、武家屋敷が立ち並ぶ角館、のどかな里山風景の西木。四季折々の絶景、グルメ、伝統文化体験、おすすめスポットやモデルコースなど、田沢湖・角館の旅を徹底ガイド！ | - | - | - |
| #1,000,000 | greenjobs.de | greenjobs.de - Umwelt macht KarriereAuf greenjobs.de findet ihr Jobs im Bereich Agrarwende, Verkehrswende, Energiewende und dem klassischen Umweltschutz. Startet eure grüne Karriere hier! | - | DE | de |
| #1,000,000 | solarserver.de | Solarserver - Das Internetportal für erneuerbare EnergienTäglich aktuelle Solarnews zu den Themen Strom, Wärme, Mobilität - u.a. Photovoltaik und Solarthermie. Fundierte Hintergrundinformationen helfen den Überblick zu behalten! | - | DE | de |
| #1,134,143 | hari-study.com | ハリスタ｜鍼灸師国家試験対策アプリ超効率的学習を資格AI®︎がサポート！最小努力で鍼灸師の国家試験を合格するための試験対策アプリです。 | - | - | - |
| #1,757,431 | hikkoshizamurai.jp | おすすめの格安SIM・光回線比較サイト SoldiSoldi（ソルディ）は格安SIMや光回線など毎月の通信費をかしこく節約するための情報を発信しているメディアです。 | 株式会社エイチームライフデザイン | - | - |
| #5,000,000 | rgbstock.com | Free stock photos - Rgbstock - Free stock images, Download totally free stock photos from Rgbstock. More than 110,000 stock photos and stock images online. Free account. | Rgbstock.com | - | en |
| #5,000,000 | tknz.co.nz | MUST BE 18: Nice Girls For Nice Guys. Gentleman’s Club, Seaview, Lower Hutt. | - | - | - |
| #5,000,000 | westmerebutchery.co.nz | Best Butcher Auckland | Free Range Meat Delivery NZBest Butcher Auckland | Free Range Meat Delivery NZ: Westmere Butchery Auckland for gourmet, organic & speciality meat products. Order online or instore. | - | - | - |
| #5,000,000 | nursta.jp | ナースタ｜看護師国家試験対策アプリ看護師国家試験で9割正解の現役看護師が考えた最小努力で合格するための国家試験対策アプリ。 | - | - | - |
| #5,000,000 | pianocenter.jp | 【ピアノ買取センター】中古ピアノ買い取り査定｜相場より高く売る方法を紹介ピアノ売却・ピアノ査定ならお任せください！！複数のピアノ買取業者へ一括査定ができるシステムを提供しています。不要になったあなたのピアノを買取って欲しいとき、複数の買取業者へわざわざ確認する必要なく簡単にウェブ上で査定が可能になります。 | - | - | - |
| #5,000,000 | henry-jr.de | Henry jr - Anmeldung | - | - | - |
| #5,000,000 | sumashuku.jp | 夙川中学校・高等学校 | - | - | - |
| #5,000,000 | yardekol.ru | Новинки - Каталог - Ярдеколь | - | - | - |
| #7,483,067 | growth-and.com | Growth & Communications | 期待を超える価値の創出Web系・オープン系システム開発を中心に、インフラ構築、組込み開発、データ分析などを行っております。更にVR、AI、IoTなどの先端ITへの研究、Liferayのオフィシャルパートナーとしてお客様の課題解決にコミットいたします。Growth＆Communicationsのエンジニアは周囲とのコミュニケーションを決して欠かさず、高いモチベーションを持ち日々スキルアップをしております。 | - | - | - |
| #10,000,000 | eejobs.de | eejobs.de - die Jobbörse für die EnergiewendeAuf eejobs.de findet ihr Jobs im Bereich Energiewende. Karrierechance Erneuerbare Energien, Elektromobilität, Energieeffizienz und Klimaschutz! | - | DE | de |
| #10,000,000 | ot-study.com | フィジスタ｜作業療法士国家試験対策アプリ超効率的学習を資格AI®︎がサポート！最小努力で作業療法士の国家試験を合格するための試験対策アプリです。 | - | - | - |
| #10,000,000 | coolmoves.co.nz | Furniture Delivery Wellington | Movers Hutt Valley, PoriruaFurniture Delivery Wellington | Movers Hutt Valley, Porirua: Cool Moves is an experienced Wellington-based moving company with the expertise, professionalism and capacity to move to your new home or office | - | - | - |
| #10,000,000 | pt-study.com | フィジスタ｜理学療法士国家試験対策アプリ超効率的学習を資格AI®︎がサポート！最小努力で理学療法士の国家試験を合格するための試験対策アプリです。 | - | - | - |
| #10,000,000 | incurvy.de | Damenmode große Größen und Plus Size Outfit-Inspirationen!INCURVY - Damenmode große Größen, Trends und Plus Size Outfits. Entdecke die riesige Auswahl an Online-Shops für große Größen & Top-Marken. Jetzt shoppen! | - | - | - |
| #10,000,000 | informphysio.co.nz | upper hutt physio certified mckenzie clinic wellingtonupper hutt physio certified mckenzie clinic wellington: A full range of physiotherapy services as well as clinical pilates, sports massage and podiatry | - | - | - |
Complete H2O website dataset in CSV. One-time purchase.
H2O dataset · CSV
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TechLeads scans public websites and identifies H2O from signals in the page HTML, scripts, cookies, HTTP headers and DNS records. Website counts refresh daily; this page uses data from October 31, 2026. Counts only include websites we have scanned, so they can differ from other providers.
The TechLeads live index currently lists 156 websites using H2O. Open the sample table on this page or download the lead list.
The chart on this page is monthly HTTP Archive crawl detections for H2O, compared with other Web Servers technologies. It is not the TechLeads live index.
In the same HTTP Archive category, H2O is charted against Apache HTTP Server, LiteSpeed, IIS, OpenResty, OpenGSE. Live-index co-occurrence on this page is a separate signal.
Companies and websites using H2O in the TechLeads index include lowreal.net, psychonautwiki.org, peco-japan.com, juusta.jp, dh-study.jp. The full list of 156 websites, with company name, country and language, is available as a CSV export.
TechLeads scans public websites and matches H2O by signals in the page HTML, scripts, cookies, HTTP headers and DNS records. Website counts refresh daily.
Yes. A one-time H2O 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 H2ORank
Monthly detections of H2O in the HTTP Archive crawl. This is historical crawl coverage, not the TechLeads live website index.
Same HTTP Archive category (Web Servers), 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.
Rank-band history is not available for this technology.
Technologies most frequently detected on the same websites as H2O. Counts are websites in the live index.
Distribution of websites using H2O across countries in the TechLeads database.
| Country | Sites | Relative size |
|---|---|---|
| Germany (DE) | 3 | |
| Brazil (BR) | 1 | |
| Japan (JP) | 1 |
Sites where we first detected H2O, by week (UTC, weeks start Monday). These are newly detected sites, and the counts follow our discovery coverage.
22
sites newly detected in the last 12 weeks
H2O is a fast and secure HTTP/2 server written in C by Kazuho Oku.
Our comprehensive database contains 156 websites using H2O, making it the most complete H2O sites list available. This H2O customer websites directory helps businesses detect websites using H2O and identify potential leads.
The largest concentrations of H2O websites are in DE, BR, JP, based on our indexed country data.
Websites using H2O commonly also use C, HTTP/2, jQuery, Google Analytics, HSTS — reflecting typical H2O technology stacks.
Our H2O technology detection system scans millions of websites to identify those powered by H2O. This list of sites with H2O includes detailed information such as company names, contact details, social media profiles, and website rankings. Whether you're looking for top websites with H2O or exploring H2O adoption trends, our database provides comprehensive insights.
Each entry in our H2O 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 H2O and reach out to potential customers or partners.
Get instant access to the full list of sites with H2O in CSV format. Our dataset includes all 156 H2O 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 H2O powered websites.
