Technology · A/B Testing · Conversion Optimization
88,840 websites in the live index use Optimizely as of October 2026. Download the full list of Optimizely websites with website, company, country and language.
SourceAs of October 27, 2026, TechLeads detects Optimizely on 88,840 websites: 20.1% of Site Optimization detections, the 4th most-used of 30 Site Optimization technologies we track. Used by 21 of the top 1,000 ranked websites using Optimizely.
Sample results for Optimizely. Description is shown under each title.
| Rank | Website | Title · Description | Company | Country | Language |
|---|---|---|---|---|---|
| #175 | time.com | TIME's 2020 Kid of the Year: Meet Gitanjali Rao | TIMEMeet TIME's first-ever Kid of the Year: a 15-year-old scientist and inventor who uses technology to tackle issues ranging from contaminated drinking water to cyberbullying. | Time | - | - |
| #176 | mailchimp.com | Temporary Server Issue | MailchimpSteigere dein Wachstum mit den zeitsparenden Marketing-Tools von Mailchimp. Starte deine 14-tägige kostenlose Testphase. | - | - | - |
| #206 | justgiving.com | Crowdfunding For Good From JustGivingIʼm raising money to undefined. Support this JustGiving Crowdfunding Page. | - | - | - |
| #248 | fortune.com | Fortune AnalyticsThe datasets behind Fortune's iconic rankings, including the Fortune 500. | - | - | - |
| #309 | slack.com | SlackConnect faster with Slack’s video meeting platform. Start a video chat, share screens, and collaborate in one virtual meeting app and online tool today. | - | - | - |
| #468 | apnews.com | Auto RacingGet the latest auto racing news and results, including IndyCar, Formula One, NASCAR and NHRA racing from The Associated Press | AP News | - | en |
| #538 | asana.com | Loading... - Form by AsanaDownload the Asana desktop or mobile app with support for Windows, Mac, iPhone, iPad, or Android devices. | - | - | - |
| #709 | prezi.com | Prezi | AI presentations that engage your audience in minutesLog into Prezi here. Get Prezi account access by signing into Prezi here, and start working on or editing your next great presentation. | Prezi Inc. | - | - |
| #760 | eji.org | HomeEJI works to end mass incarceration, excessive punishment, and racial inequality. | - | - | - |
| #956 | sproutsocial.com | Sprout Social: Social Media Management ToolMaximize your social ROI with Sprout Social, trusted by 30k+ brands. Power everything from publishing and engagement to analytics and influencer marketing. Try 30 days free. | Justyn Howard | - | - |
| #1,000 | bbc.com | Noticias - BBC News Mundoताजा समाचार, विश्लेषण, रेडिओ नेपाली भाषामा - Latest News, Explainers, Radio in Nepali, BBC Nepali Sewa | - | - | es |
| #1,000 | focus.de | FOCUS BusinessFOCUS-Business unterstützt junge und motivierte Menschen dabei, sich im Berufsalltag zurechtzufinden. | - | DE | de |
| #1,000 | news.com.au | news.com.au — Australia’s leading news site for latest headlinesRead the latest headlines covering sports, entertainment, finance, politics and national breaking news. Be on it with Australia's leading news site. | news.com.au — Australia’s leading news site for latest headlines | AU | en |
| #2,944 | adblockplus.org | Adblock Plus | The world's #1 free ad blockerAdblock Plus, the most popular ad blocker on Firefox, Chrome, Safari, Android and iOS. Block pop-ups and annoying ads on websites like Facebook and YouTube. | - | - | - |
| #3,403 | kotlinlang.org | Kotlin Programming LanguageKotlin is a concise and multiplatform programming language by JetBrains. Enjoy coding and build server-side, mobile, web, and desktop applications efficiently. | - | - | - |
| #4,547 | vancouver.ca | Vancouver City Planning Commission | City of VancouverAdvises City Council on planning and development issues in Vancouver. | - | - | - |
| #5,000 | bahn.de | Hilfe und KontaktHier finden Sie Antworten auf häufige Fragen zu Tickets und Angeboten sowie Services der Deutschen Bahn. Nutzen Sie auch die Self-Services. | - | DE | de |
| #5,000 | change.org | Change.orgDetta är den svenska versionen av det tyska uppropet som samlat över 900 000 underskrifter Det har nu gått snart tre år sedan kriget i Ukraina startade på bred front. Över 200 000 soldater och uppåt 10 000 civila har hittills dödats. Nästan 14 miljoner människor har tvingats fly från sina hem. Drygt | - | US | en-US |
| #5,000 | chip.de | CHIP | News, Tests, Downloads, Tech- & VerbraucherberatungCHIP - Deutschlands großes Tech- und Verbraucherportal für News, Bestenlisten, Downloads, unabhängige Tests & Kaufberatung und mehr! | Chip | DE | de |
| #5,000 | coches.net | Coches.net: Coches nuevos, coches de ocasión, seminuevos, Km0La mejor oferta de coches de km0 y segunda mano en España: sea cual sea tu estilo de vida, tenemos un coche para ti. Coches nuevos, de segunda mano, y Km0, noticias de motor, videos y foros de coches. Compara las mejores ofertas y contacta con particulares y concesionarios. ¡Tu próximo coche está aq | - | ES | es-Es |
| #5,000 | funda.nl | Zoek huizen en appartementen te koop / huur in Nederland | FundaVind je huis op Funda! Het grootste aanbod van koopwoningen en huurwoningen in Nederland. Vind inzichten & inspiratie en check de waarde van je huis. | NL | NL | nl-NL |
| #5,000 | mobile.de | mobile.de maşini noi și second-hand - Piața dvs. de vehicule din EuropaGăsiţi automobile, rulote, motociclete, autocamioane şi vehicule utilitare pe mobile.de/ro: cea mai mare piaţă auto online a Germaniei | - | DE | ro |
| #5,000 | npr.org | Wait Wait...DonPeter Sagal and Bill Kurtis host the weekly NPR News quiz show alongside some of the best and brightest news and entertainment personalities. | NPR | - | en |
| #5,000 | shopch.jp | 通販・テレビショッピングのショップチャンネル24時間放送、テレビショッピングでお馴染みのショップチャンネルの通販サイト。テレビ通販と連動して世界中から集めた厳選商品を皆様にお届けします。 | - | JP | - |
| #5,000 | tv2.no | Politikk - TV2.noTV 2 er Norges beste nettsted for nyheter, sport, underholdning, vær, tv-guide og video | TV 2 | NO | nb-NO |
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The most-used Site Optimization technologies in the TechLeads index, by number of websites. Optimizely accounts for 20.1% of Site Optimization detections (88,840 websites).
| No. | Technology | Websites | Share of Site Optimization | Relative size |
|---|---|---|---|---|
| 01 | comScore | 114,380 | 25.9% | |
| 02 | Matomo | 108,652 | 24.6% | |
| 03 | Crazy Egg | 98,067 | 22.2% | |
| 04 | Contentsquare | 23,742 | 5.4% | |
| 05 | Monetate | 2,300 | 0.52% | |
| 06 | BrightEdge |
TechLeads scans public websites and identifies Optimizely from signals in the page HTML, scripts, cookies, HTTP headers and DNS records. Website counts refresh daily; this page uses data from October 27, 2026. Counts only include websites we have scanned, so they can differ from other providers.
The TechLeads live index currently lists 88,840 websites using Optimizely. Open the sample table on this page or download the lead list.
The chart on this page is monthly HTTP Archive crawl detections for Optimizely, compared with other A/B Testing technologies. It is not the TechLeads live index.
In the same HTTP Archive category, Optimizely is charted against Complianz, OneSignal, Google Optimize, Zoho PageSense, Adobe Target. Live-index co-occurrence on this page is a separate signal.
Companies and websites using Optimizely in the TechLeads index include time.com, mailchimp.com, justgiving.com, fortune.com, slack.com. The full list of 88,840 websites, with company name, country and language, is available as a CSV export.
By number of websites in the TechLeads index, the most-used Site Optimization alternatives to Optimizely are comScore (114,380), Matomo (108,652), Crazy Egg (98,067).
TechLeads scans public websites and matches Optimizely by signals in the page HTML, scripts, cookies, HTTP headers and DNS records. Website counts refresh daily.
| 1,958 |
| 0.44% |
| 07 | KISSmetrics | 1,324 | 0.30% |
|---|
Yes. A one-time Optimizely 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 OptimizelyRank
Monthly detections of Optimizely in the HTTP Archive crawl. This is historical crawl coverage, not the TechLeads live website index.
Same HTTP Archive category (A/B Testing), 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 Optimizely. Counts are websites in the live index.
Sites where we first detected Optimizely, by week (UTC, weeks start Monday). These are newly detected sites, and the counts follow our discovery coverage.
3,532
sites newly detected in the last 12 weeks
Related Optimizely products and extensions detected as separate technologies in our catalog. Counts are sites.
No match
Nothing in the Optimizely ecosystem matches that filter.
Optimizely empowers companies to deliver more relevant and effective digital experiences on websites and mobile through A/B testing and personalization.
Our comprehensive database contains 88,840 websites using Optimizely, making it the most complete Optimizely sites list available. This Optimizely customer websites directory helps businesses detect websites using Optimizely and identify potential leads.
Websites using Optimizely commonly also use jQuery, Google Analytics, Google Tag Manager, core-js, Open Graph — reflecting typical Optimizely technology stacks.
Our Optimizely technology detection system scans millions of websites to identify those powered by Optimizely. This list of sites with Optimizely includes detailed information such as company names, contact details, social media profiles, and website rankings. Whether you're looking for top websites with Optimizely or exploring Optimizely adoption trends, our database provides comprehensive insights.
Each entry in our Optimizely 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 Optimizely and reach out to potential customers or partners.
Get instant access to the full list of sites with Optimizely in CSV format. Our dataset includes all 88,840 Optimizely 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 Optimizely powered websites.
