33Across on new websites
Supply-side advertising platform and header bidding exchange for publishers.
- Sites using 33Across
- 12
- since May 2026
- Last 30 days
- 0.0%
-
of new sites, to Oct 21
no change on the 30 days before - Last 7 days
- 0.0%
- of new sites, 7-day average
no change on the week before
| First seen | May 21, 2026 |
|---|---|
| Last seen | Oct 7, 2026 |
| Website | 33across.com |
What we found
- 33Across appeared on 4 new sites in the last 30 days.[1]
Share of new sites using 33Across
The line is the 7-day average share of new sites that use 33Across, since 17 September. It starts at our first detection.
Who uses 33Across
| Ending | Sites | Share | Bar |
|---|---|---|---|
| .com | 7 | 58.3% | |
| .fr | 1 | 8.3% | |
| .live | 1 | 8.3% | |
| .org | 1 | 8.3% | |
| .ua | 1 | 8.3% | |
| .xyz | 1 | 8.3% |
Advertising on new sites
| # | Movement | Tool | Share of category | Bar | |
|---|---|---|---|---|---|
| 1 | – |
Facebook Pixel
|
47.4% | ||
| 2 | – |
Google Ads
|
37.2% | ||
| 3 | – |
Google AdSense
|
17.7% | ||
| 4 | – |
TikTok Pixel
|
10.7% | ||
| 5 | – |
Pinterest
|
8.1% | ||
| … | |||||
| 288 | ▼15 | 33Across | <0.1% | ||
All-time shares across the new sites we track: of all of them, and of the sites using any Advertising tool. Among September launches it ranked #277 in Advertising, down from #262 in August. All 1297 in Advertising
Recently launched products built on 33Across
1 of the 12 sites using 33Across are product launches we list individually. The other 11 are new business and personal sites: they count towards the figures above but are not listed here. A watch sends them to you.
| Site | Found |
|---|---|
Mixpanel Headless
mixpanel.com · Developer Tools ·  Brazil
|
May 21 |
Watches, exports and the API give you all 12 sites using 33Across, from £15 a month.
Notes
- These figures cover websites that went live since April 2026, not the web as a whole.
How this page is made
FirstSited looks at each new website near the day it goes live and records what it was built with. We do not go back later, so these figures describe what sites launch with, not what they run today. A site counts towards 33Across when we detect 33Across on it at that look.
Every share on this page is a proportion of the new sites we were tracking at the time. Sites we found across the wider web count towards the figures, but only product launches are listed by name. How we detect technologies · How we find new sites