Uvicorn on new websites

1. Uvicorn appeared on about 1,900 new sites in the last 30 days.^[1]
2. Seven in ten new Uvicorn sites also use Caddy.
3. It is unusually common on .cloud domains: 2.1% of the domains running it, against 0.41% of domains across new sites.

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

#	Movement	Tool	Share of all sites	Share of category	Bar
1	–	nginx	9.6%	37.4%
2	–	LiteSpeed Web Server	6.6%	25.9%
3	–	Apache	4.7%	18.3%
4	–	Caddy	3.0%	11.7%
5	–	OpenResty	0.9%	3.5%
…
9	–	Uvicorn	0.1%	0.3%

All-time shares across the new sites we track: of all of them, and of the sites using any Server tool. All 143 in Server

Tool	Sites with both	vs all new sites	Bar
Caddy	3,632	24x

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

1,789 of the 5,137 sites using Uvicorn are product launches we list individually. The other 3,348 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
Compra Tu Carro Perú — Informe vehicular antes de comprar tu auto usado compratucarroperu.com	Oct 20
Relay — Agent Rooms relay-ai.pro · Russia	Oct 19
Home · Emissary emissaryproject.org	Oct 19
ClosetOS · Your wardrobe, working together kpclosetos.com	Oct 19
Video Variator — больше креативов из одного видео videovariator.com · Content	Oct 19
TENSIO — кошторис стелі з фото заміру tensio.com.ua · Ukraine	Oct 19
The Free AI Financial Newswire | Capital Data Wire capitaldatawire.com	Oct 19
Лента MCP – продукты по вашему запросу lentamcp.com · AI	Oct 19
AEC Planner — Procurement monitoring for Florida AEC firms aecplanner.com	Oct 19
soundpoint: русская речь в текст soundpoint.pro · Content	Oct 19
SiteSeed – Websites aus dem, was Sie schon haben | Hindricks Systems GmbH siteseed.de · Germany	Oct 19
Gillspotter — whale sharks, known by their stars gillspotter.com	Oct 19

Showing the most recent 12 of 1,789.

Watches, exports and the API give you all 5,137 sites using Uvicorn, 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.