Auth.js on new websites

1. About 1 in 380 websites that went live in the last 30 days use Auth.js (0.3%).^[1]
2. It is the third most common authentication service on new sites. Google Sign-In appears on about 4 times as many.
3. Almost all new Auth.js sites also use React.

The line is the 7-day average share of new sites that use Auth.js, since 10 September.

#	Movement	Tool	Share of all sites	Share of category	Bar
1	–	Google Sign-In	1.7%	62.5%
2	▲1	Clerk	0.5%	16.7%
3	▼1	Auth.js	0.4%	15.6%
4	–	Google Identity Platform	0.1%	2.3%
5	▲4	Privy	<0.1%	1.1%

All-time shares across the new sites we track: of all of them, and of the sites using any Auth tool. The most common alternatives to Auth.js on new websites are Clerk and Google Identity Platform. All 172 in Auth

Tool	Sites with both	vs all new sites	Bar
Next.js	24,435	6.9x
Vercel	12,104	3.6x
React	24,557	3.6x
Tailwind CSS	20,647	3.3x
Lucide Icons	13,516	3.3x

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

15,587 of the 25,794 sites using Auth.js are product launches we list individually. The other 10,207 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
SingBooth — Cantá. Respirá. Crecé. singbooth.app	Oct 21
CrystalBall - See who's been doing what sswcrystalball.com · Developer Tools	Oct 21
FBR Digital Invoicing for Pakistan | ByarInvoice byarinvoice.com · Finance · Pakistan	Oct 21
Lockbay — Self-Storage Software for Small Operators lockbaytool.com · United States	Oct 21
Manga Studio — Vos scènes, en clips d'animé studio-manga.com	Oct 21
Vrittara — Get everyday business work done vrittara.app · Productivity	Oct 21
CFO Copilot · Currency, customers and cash for UK businesses cfocopilot.live · Finance · United Kingdom	Oct 21
TuRepuestoYa | ¡La nueva forma de cuidar tu vehículo en Venezuela! somosacelera.app · Venezuela	Oct 20
rawdawg rawdawg.io	Oct 20
DealShop Ireland — Buy & Sell Safely in Ireland dealshop.ie · E-commerce · Ireland	Oct 20
Моя Справа: інтелектуальна правова платформа moyasprava.com.ua · Ukraine	Oct 20
Nurslix · 為台灣護理師而造的 NCLEX 備考讀本 nurslix.zeabur.app · Taiwan	Oct 20

Showing the most recent 12 of 15,587.

Watches, exports and the API give you all 25,794 sites using Auth.js, 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.