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Xandr on new websites

Name: Xandr adoption on new websites
Creator: StackScope

Xandr (formerly AppNexus): ad exchange and DSP, owned by Microsoft.

#28 of 1275 in Advertising First seen: Apr 9, 2026 Last seen: Oct 16, 2026 Most recent launch: d5 Metronome and tuner, Oct 13, 2026

522 sites

486 found by StackScope, 36 via launch platforms

StackScope Wider Web 479
StackScope Discovery (Indie) 7
Product Hunt 23
PeerPush 11
Hacker News 2

View: All sites All launches Launch platforms StackScope Discovery StackScope Wider Web

Xandr appeared on about 180 new sites in the last 30 days.

These figures cover websites that went live since April 2026, not the web as a whole.

Stackdar alerts

Get told when a new site ships with Xandr.

175 new sites with Xandr first seen in the last 30 days.

Stackdar watches every launch we detect and sends you the ones using Xandr, by email, Slack or webhook. On every plan, from £15 a month.

See how alerts work

Share of new sites using Xandr

Each dot is one launch day. Line is the 7-day rolling average; weekly averages before July 2026.

0.0%

last 7 days

+0.0pp vs prior week

0.0%

30 days to Oct 15

-0.0pp vs 30 days before

522

sites all time

since Apr 2026

Mar 30, 2026 90 days Oct 15, 2026

The shaded areas were measured against a different set of sites, so the line can step there without Xandr itself changing.

Coverage details

Before the dashed line where the dots begin, the line is a weekly average. After it, the last 90 days are shown one day at a time.

Grey: before 8 July 2026, we only tracked launches from launch platforms. From that date we crawl the wider web as well.

Amber: 8 July to 10 September 2026, before we improved our infrastructure to index new sites much sooner, often on the day they go live. Sites found that early often haven't finished setting up, so anything usually added after launch reads lower from 10 September. We record each site as it was when we found it.

The share is a proportion of whatever we were tracking at the time. For a single continuous measure, switch to launch platforms.

⋮ Oct 15, 2026: Detection made stricter: a site now counts only when this technology loads on the page. Launches crawled before this date may overcount.

How StackScope detects technologies

What kind of sites use Xandr

144 sites with a known type, all time

Health

18.1%

Content

13.9%

Developer Tools

11.8%

E-commerce

9.0%

Education

9.0%

Productivity

6.9%

Finance

6.3%

Crypto

5.6%

Social

5.6%

Games

4.9%

Design

4.2%

Marketing

3.5%

Hiring & HR

1.4%

Domain endings using Xandr

521 sites, all time

.com 55.5%
.org 6.1%
.online 5.2%
.site 4.6%
.net 4.4%
.fr 3.7%
.blog 3.5%
.live 2.9%
.au 1.5%
.co 1.5%
.uk 1.3%
.ca 1.2%
.in 1.0%

Country

Country known for 53 of 522 sites (10.2%), all time.

How we know

Country comes from what each site says about itself, such as a company registration, legal terms or a phone number, not just its domain ending. We count a country only where it is stated plainly enough to be sure: a governing-law clause or company registration number on a legal page, a phone country code, or a country domain ending. Sites that publish none are not counted at all.

United States 41.5%
France 32.1%
Australia 9.4%
United Kingdom 3.8%
Italy 3.8%
Brazil 1.9%
Canada 1.9%
India 1.9%
Japan 1.9%
Philippines 1.9%

Green hosting

36 checked sites since Apr 2026.

What this means

The share whose web host The Green Web Foundation lists as running on green energy, against the average for every new site we checked.

Xandr 53%
Average 47%

Advertising leaders

		Tool	% of sitesall time	% of categoryall time
#1	–	Facebook Pixel	3.4%	47.2%
#2	–	Google Ads	2.7%	37.3%
#3	–	Google AdSense	1.3%	17.9%
#4	–	TikTok Pixel	0.8%	10.7%
#5	–	Pinterest	0.6%	8.2%
…
#28	▼2	Xandr Current page	<0.1%	0.1%

Percentages show all-time adoption across the new sites we track: the share of all of them, and of the sites using any Advertising tool.Xandr is typically used alongside Facebook Pixel rather than instead of it.Among September launches it ranked #28 in Advertising, down from #26 in August. All 1275 in Advertising →

Often used with

Tool	Sites	vs all new sites
PubMatic	255	9611x
Criteo	254	4111x
Prebid.js	244	2543x
Amazon Publisher Services	294	1066x
Google Ads	464	33x

Tools that turn up far more often on Xandr sites than on new sites in general, and how many times as common each one is there.

Recent launches using Xandr

43 of the 522 sites using Xandr are product launches we list individually. The other 479 are sites we found crawling the wider web: they count towards the figures above, but we do not publish them one by one. They are included in the StackScope API and in Stackdar alerts. How StackScope Discovery works