C99 on new websites
C99 OSINT and web analytics/tracking API service.
- Sites using C99
- 2
- since Jun 2026
- Last 30 days
- 0.0%
-
of new sites, to Oct 22
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 | Jun 23, 2026 |
|---|---|
| Last seen | Oct 13, 2026 |
What we found
- C99 appeared on 1 new site in the last 30 days.[1]
Share of new sites using C99
The line is the 7-day average share of new sites that use C99, since 6 October. It starts at our first detection.
Analytics on new sites
| # | Movement | Tool | Share of category | Bar | |
|---|---|---|---|---|---|
| 1 | – |
Google Analytics
|
43.0% | ||
| 2 | – |
Tinybird
|
15.8% | ||
| 3 | ▼1 |
Cloudflare Web Analytics
|
10.5% | ||
| 4 | ▲1 |
Sourcebuster
|
10.3% | ||
| 5 | – |
Vercel Analytics
|
6.8% | ||
| 6 | – |
Microsoft Clarity
|
4.7% | ||
| 7 | – |
PostHog
|
4.3% | ||
| 8 | ▲1 |
Plausible
|
3.3% | ||
| 9 | – |
Umami
|
3.2% | ||
| 10 | – |
Bilmur (WordPress.com RUM)
|
2.2% | ||
| 11 | ▼1 |
Yandex Metrica
|
1.5% | ||
| 12 | ▲2 |
Snowplow
|
1.1% | ||
| … | |||||
| 837 | C99 | <0.1% | |||
All-time shares across the new sites we track: of all of them, and of the sites using any Analytics tool. All 1532 in Analytics
Recently launched products built on C99
2 of the 2 sites using C99 are product launches we list individually.
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 C99 when we detect C99 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