Stack Auth on new websites
Open-source authentication and user management platform.
- Sites using Stack Auth
- 73
- since Apr 2026
- Last 30 days
- 0.0%
-
of new sites, to Oct 19
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 | Apr 17, 2026 |
|---|---|
| Last seen | Oct 17, 2026 |
What we found
- Stack Auth appeared on 14 new sites in the last 30 days.[1]
- Nine in ten new Stack Auth sites also use shadcn/ui.
Share of new sites using Stack Auth
The line is the 7-day average share of new sites that use Stack Auth, since 11 September. It starts at our first detection.
Who uses Stack Auth
| Type | Sites | Share | Bar |
|---|---|---|---|
| Marketing | 6 | 16.7% | |
| AI | 4 | 11.1% | |
| Developer Tools | 4 | 11.1% | |
| Productivity | 4 | 11.1% | |
| E-commerce | 3 | 8.3% | |
| Finance | 3 | 8.3% | |
| Games | 3 | 8.3% | |
| Health | 3 | 8.3% | |
| Social | 3 | 8.3% | |
| Content | 1 | 2.8% | |
| Directory | 1 | 2.8% | |
| Hiring & HR | 1 | 2.8% |
| Country | Sites | Share | Bar |
|---|---|---|---|
 UK |
4 | 36.4% | |
 Canada |
2 | 18.2% | |
 India |
2 | 18.2% | |
 US |
2 | 18.2% | |
 Norway |
1 | 9.1% |
| Ending | Sites | Share | Bar |
|---|---|---|---|
| .com | 27 | 37.0% | |
| .app | 15 | 20.6% | |
| .uk | 5 | 6.9% | |
| .ca | 4 | 5.5% | |
| .ai | 3 | 4.1% | |
| .space | 3 | 4.1% | |
| .dev | 2 | 2.7% | |
| .in | 2 | 2.7% | |
| .online | 2 | 2.7% | |
| .co | 1 | 1.4% | |
| .io | 1 | 1.4% | |
| .me | 1 | 1.4% |
Auth on new sites
| # | Movement | Tool | Share of category | Bar | |
|---|---|---|---|---|---|
| 1 | – |
Google Sign-In
|
62.3% | ||
| 2 | ▲1 |
Clerk
|
16.7% | ||
| 3 | ▼1 |
Auth.js
|
15.7% | ||
| 4 | – |
Google Identity Platform
|
2.3% | ||
| 5 | ▲4 |
Privy
|
1.1% | ||
| … | |||||
| 23 | ▼7 | Stack Auth | <0.1% | ||
All-time shares across the new sites we track: of all of them, and of the sites using any Auth tool. Among September launches it ranked #29 in Auth, down from #22 in August. All 172 in Auth
Often used with Stack Auth
| Tool | Sites with both | vs all new sites |
|---|---|---|
shadcn/ui
|
65 | 28x |
Next.js
|
54 | 5.4x |
Vercel
|
37 | 3.9x |
Lucide Icons
|
44 | 3.7x |
Tailwind CSS
|
62 | 3.5x |
Tools that turn up far more often on Stack Auth sites than on new sites in general, and how many times as common each one is there.
Recently launched products built on Stack Auth
46 of the 73 sites using Stack Auth are product launches we list individually. The other 27 are new business and personal sites: they count towards the figures above but are not listed here. A watch sends them to you.
Brazil
South Korea
Showing the most recent 12 of 46.
Watches, exports and the API give you all 73 sites using Stack Auth, from £15 a month.
Notes
- These figures cover websites that went live since April 2026, not the web as a whole.
- 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.
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 Stack Auth when we detect Stack Auth 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