As of October 8, 2026, 33Across is used by 193,447 websites in the TechLeads index: 2.1% of all Advertising detections, the 11th most-used of 293 Advertising technologies.
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Citation
TechLeads. "33Across Customers and Market Share." Data as of October 8, 2026. https://techleads.fyi/technology/33across/market-shareHTML link
<a href="https://techleads.fyi/technology/33across/market-share">33Across 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, 33Across was detected on 193,097 pages in September 2026, down 65.5% from a year earlier (peak: 939,482). Among the 1,000 most-visited sites, it appeared on 45. 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 193,447 websites using 33Across or download the full list as a CSV for $29.
TechLeads scans public websites and detects 33Across from signals in the page HTML, scripts, cookies, HTTP headers and DNS records. Market share is 33Across'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.