Sites using FullStory Data Layer Observer
JavaScript utility that observes and transforms a site's data layer and forwards the results to FullStory.
Get told when a new site ships with FullStory Data Layer Observer.
Stackdar watches every launch we detect and sends you the ones using FullStory Data Layer Observer, by email, Slack or webhook. On every plan, from £15 a month.
See how alerts work40 sites
39 found by StackScope, 1 via launch platforms
- StackScope Wider Web 39
- Product Hunt 1
FullStory Data Layer Observer has been detected on 40 launches we've crawled, with 20 of those in September 2026 (0.0% of the month's launches so far). The 7-day rolling share is 0.0%, roughly steady week on week. Most recent detection: Superhuman Go, yesterday.
It's most commonly paired with FullStory, HSTS, and Cloudflare. By product type, the launches using it are most often E-commerce (93%) and Finance (7%). By domain ending, launches using it are 1.5 times as likely as the average launch to live on a .com domain.
What kind of products ship with FullStory Data Layer Observer
14 launches
Domain endings using FullStory Data Layer Observer
40 sites
- .com 72.50%
- .net 22.50%
Share of new sites using FullStory Data Layer Observer
Each dot is one launch day. Line is the 7-day rolling average. Chart starts at first detection.
The shaded part of the chart is measured against a different set of sites.
Amber: on 10 September 2026 we improved our infrastructure so we can 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 that date. We record each site as it was when we found it.
The share is a proportion of whatever we were tracking at the time, so it can step at that line without the technology itself changing. For a single continuous measure, switch to launch platforms.
Analytics leaders
| Tool | % of launches | % of category | ||
|---|---|---|---|---|
| #1 | – |
Google Analytics
|
10.68% | 44.26% |
| #2 | – |
Tinybird
|
3.50% | 14.52% |
| #3 | ▲1 |
Sourcebuster
|
2.78% | 11.52% |
| #4 | – |
Cloudflare Web Analytics
|
2.63% | 10.90% |
| #5 | ▼1 |
Vercel Analytics
|
1.77% | 7.35% |
| … | ||||
| #178 |
FullStory Data Layer Observer
Current page
|
<0.01% | <0.01% | |
Percentages show adoption among indie launches: the share of all analysed launches, and of launches using any Analytics tool. All 1323 in Analytics →
Often used with
| Tool | Sites |
|---|---|
FullStory
|
40 |
| HSTS | 37 |
Cloudflare
|
32 |
Vite
|
32 |
Shopify
|
31 |
Tools most often detected on the same sites as FullStory Data Layer Observer.
Recent launches we can show
1 of the 40 sites using FullStory Data Layer Observer are product launches we list individually. The other 39 are sites we found crawling the wider web: they count towards the figures above, but we do not publish them one by one. How StackScope Discovery works
The StackScope API serves all 40 sites using FullStory Data Layer Observer, filterable and exportable, from £15 a month.