Firebase App Check on new websites

1. Firebase App Check appeared on about 630 new sites in the last 30 days.^[1]
2. Six in ten new Firebase App Check sites also use Fastly.
3. It is unusually common among social launches: 10%, against 4.8% across new sites.

The line is the 7-day average share of new sites that use Firebase App Check, since 10 September.

#	Movement	Tool	Share of all sites	Share of category	Bar
1	–	HSTS	47.4%	87.4%
2	–	Cloudflare Bot Management	13.7%	25.2%
3	–	Google reCAPTCHA	1.9%	3.5%
4	▲1	Anubis	0.1%	0.2%
5	▼2	DDoS-Guard	0.1%	0.2%
…
8	▼1	Firebase App Check	<0.1%	0.1%

All-time shares across the new sites we track: of all of them, and of the sites using any Security tool. Firebase App Check is typically used alongside HSTS rather than instead of it. All 400 in Security

Tool	Sites with both	vs all new sites	Bar
Firebase	2,772	88x
Google Sign-In	1,057	22x
Fastly	1,648	21x

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

1,638 of the 2,791 sites using Firebase App Check are product launches we list individually. The other 1,153 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	Also detected
GeoGame — Jeux de géographie gratuits : pays, drapeaux, capitales geo-game.app · Games	Oct 20
Middle Riddle — Daily word-link game themiddleriddle.com · Games	Oct 20
Licitai | Mais licitações, mais contratos licitai.dev	Oct 20
Musairec — a recorder that understands your song ideas about.musairec.app · Content	Oct 20
Bengali360 — Jobs, Rentals, Deals & Community for Bangladeshis in the USA bengali360.com · United States	Oct 19
HiringSynth | Social network robot, cobot e agenti AI hiringsynth.com	Oct 19
TrailTap | Tap the trail. Discover what's next. trailtap.uk · United Kingdom	Oct 19
Property Pencil — A better way to underwrite rental properties. propertypencil.com · Finance	Oct 19
PaperScorer: Submit a Paper paperscorer-ai.com · Productivity	Oct 19
AscensosApp Vortex - Transforma tu carrera profesional ascensosapp.com	Oct 19
Nalyzed — Free Website Analysis: Speed, SEO, Security & Tech Stack nalyzed.com	Oct 19
Jouw idee. De juiste prompt. De juiste AI. | PromptTalk prompttalk.app · AI	Oct 19

Showing the most recent 12 of 1,638.

Watches, exports and the API give you all 2,791 sites using Firebase App Check, from £15 a month.

1. These figures cover websites that went live since April 2026, not the web as a whole.
2. 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. Too few sites state their country plainly for the usual count, so this one also counts single signals: a country domain ending, a phone number (for North America, its area code), a location the site declares in its own page metadata, or a country-specific vendor stack and the page language where they agree and nothing contradicts them. Read these as likely rather than certain.
3. Green hosting is the share whose web host The Green Web Foundation lists as running on green energy, among sites checked since 1 April 2026, against the same share for every new site we checked over that time. Data from The Green Web Foundation.