As of October 8, 2026, OpenX is used by 151,902 websites in the TechLeads index: 1.6% of all Advertising detections, the 15th most-used of 293 Advertising technologies.
Quoting these numbers? Credit TechLeads with a link to this page.
Citation
TechLeads. "OpenX Customers and Market Share." Data as of October 8, 2026. https://techleads.fyi/technology/openx/market-shareHTML link
<a href="https://techleads.fyi/technology/openx/market-share">OpenX market share (TechLeads data)</a>Websites using each technology in the TechLeads index, and its share of all Advertising detections.
| # | Technology | Websites | Share |
|---|---|---|---|
| 1 | Google AdSense | 2,043,203 | 22.0% |
| 2 | Microsoft Advertising | 953,074 | 10.3% |
| 3 | DoubleClick.Net | 729,297 | 7.8% |
| 4 | Google Adsense Asynchronous | 685,635 | 7.4% |
| 5 | Twitter Ads | 561,819 | 6.0% |
| 6 | Google Publisher Tag | 556,299 | 6.0% |
| 7 |
In HTTP Archive's monthly crawl of public websites, OpenX was detected on 249,530 pages in September 2026, down 45.5% from a year earlier (peak: 899,210). Among the 1,000 most-visited sites, it appeared on 199. HTTP Archive is a separate dataset from the TechLeads index, so its numbers are not added to ours.
Same month, other Advertising technologies in HTTP Archive: Microsoft Advertising 2,441,830, Google AdSense 2,304,967, Twitter Ads 960,749, Google Publisher Tag 859,733, Prebid 593,763.
Based on country-code domains (such as .de or .co.uk); websites on .com and other generic domains are not assigned a country.
See all 151,902 websites using OpenX or download the full list as a CSV for $29.
TechLeads scans public websites and detects OpenX from signals in the page HTML, scripts, cookies, HTTP headers and DNS records. Market share is OpenX's website count divided by the website counts of all Advertising technologies we track; a site using two Advertising tools counts for both. Counts were last refreshed on October 8, 2026 and update daily.
| Prebid |
| 361,548 |
| 3.9% |
| 8 | ID5 | 359,359 | 3.9% |
| 9 | Amazon Advertising | 273,782 | 2.9% |
| 10 | Criteo | 253,369 | 2.7% |
| 11 | 33Across | 193,447 | 2.1% |
| 12 | AppNexus | 192,373 | 2.1% |
| 13 | PubMatic | 177,278 | 1.9% |
| 14 | Rubicon Project | 169,440 | 1.8% |
| 15 | OpenX | 151,902 | 1.6% |
| 16 | Google Ads | 115,079 | 1.2% |
| 17 | DoubleClick Ad Exchange (AdX) | 90,878 | 0.98% |
| 18 | Taboola | 79,389 | 0.85% |
| 19 | WordAds | 75,105 | 0.81% |
| 20 | Amazon Ad System | 74,719 | 0.80% |
| 21 | LiveIntent | 72,726 | 0.78% |
Rows link to each competitor's market share page where one exists. The table lists the 21 most-used technologies; ranks are by website count.