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Uvicorn on new websites

Lightning-fast ASGI server for Python frameworks like FastAPI, Starlette, and Django Channels.

#9 of 140 in Server In our data since Apr 2026 Last seen: Oct 16, 2026 Most recent launch: Reelvaro — Product photos into your next reel., Oct 16, 2026 Website: uvicorn.dev

4,906 sites

4,768 found by StackScope, 138 via launch platforms

StackScope Wider Web 3,195 StackScope Discovery (Indie) 1,573 Product Hunt 97 Hacker News 19 Other 18 PeerPush 4
  • StackScope Wider Web 3,195
  • StackScope Discovery (Indie) 1,573
  • Product Hunt 97
  • Hacker News 19
  • Other 18
  • PeerPush 4
View: All sites All launches Launch platforms StackScope Discovery StackScope Wider Web

Uvicorn appeared on about 1,800 new sites in the last 30 days.

These figures cover websites that went live since April 2026, not the web as a whole.

Runs on
Python
Stackdar alerts

Get told when a new site ships with Uvicorn.

1,817 new sites with Uvicorn first seen in the last 30 days.

Stackdar watches every launch we detect and sends you the ones using Uvicorn, by email, Slack or webhook. On every plan, from £15 a month.

See how alerts work

Share of new sites using Uvicorn

Each dot is one launch day. Line is the 7-day rolling average; weekly averages before July 2026.

0.1%
last 7 days
-0.0pp vs prior week
0.1%
30 days to Oct 15
+0.0pp vs 30 days before
4,906
sites all time
since Apr 2026
Uvicorn daily detection trend Before 8 July 2026: launch platforms only. We began crawling the wider web on this date, so the cohort this share is measured against changes here. 10 September 2026: we improved our infrastructure to index new sites much sooner, often on the day they go live, so the cohort this share is measured against changes here. 5% 2% 0% Apr May Jun Jul Aug Sep Oct Weekly averages before this point, daily after. Jul 18 · 24 / 24723 = 0.1% Jul 19 · 31 / 27645 = 0.1% Jul 20 · 28 / 23868 = 0.1% Jul 21 · 21 / 22945 = 0.1% Jul 22 · 19 / 24372 = 0.1% Jul 23 · 19 / 18101 = 0.1% Jul 24 · 17 / 13980 = 0.1% Jul 25 · 12 / 9550 = 0.1% Jul 26 · 21 / 21752 = 0.1% Jul 27 · 28 / 37234 = 0.1% Jul 28 · 47 / 41886 = 0.1% Jul 29 · 53 / 53564 = 0.1% Jul 30 · 56 / 48258 = 0.1% Jul 31 · 51 / 56048 = 0.1% Aug 1 · 67 / 54890 = 0.1% Aug 2 · 59 / 53852 = 0.1% Aug 3 · 32 / 52615 = 0.1% Aug 4 · 37 / 40704 = 0.1% Aug 5 · 29 / 35348 = 0.1% Aug 6 · 26 / 39149 = 0.1% Aug 7 · 34 / 40250 = 0.1% Aug 8 · 23 / 42805 = 0.1% Aug 9 · 35 / 37777 = 0.1% Aug 10 · 39 / 32324 = 0.1% Aug 11 · 26 / 34557 = 0.1% Aug 12 · 22 / 37135 = 0.1% Aug 13 · 48 / 55469 = 0.1% Aug 14 · 42 / 56755 = 0.1% Aug 15 · 34 / 55907 = 0.1% Aug 16 · 45 / 56270 = 0.1% Aug 17 · 45 / 45809 = 0.1% Aug 18 · 42 / 56662 = 0.1% Aug 19 · 41 / 51684 = 0.1% Aug 20 · 52 / 68977 = 0.1% Aug 21 · 60 / 93849 = 0.1% Aug 22 · 56 / 94192 = 0.1% Aug 23 · 65 / 93593 = 0.1% Aug 24 · 49 / 81709 = 0.1% Aug 25 · 49 / 71532 = 0.1% Aug 26 · 65 / 66856 = 0.1% Aug 27 · 78 / 87835 = 0.1% Aug 28 · 56 / 87905 = 0.1% Aug 29 · 63 / 88063 = 0.1% Aug 30 · 61 / 100668 = 0.1% Aug 31 · 79 / 100238 = 0.1% Sep 1 · 72 / 103415 = 0.1% Sep 2 · 77 / 108914 = 0.1% Sep 3 · 73 / 103276 = 0.1% Sep 4 · 64 / 98533 = 0.1% Sep 5 · 65 / 102853 = 0.1% Sep 6 · 60 / 89272 = 0.1% Sep 7 · 47 / 86119 = 0.1% Sep 8 · 67 / 77965 = 0.1% Sep 9 · 47 / 75515 = 0.1% Sep 10 · 56 / 83653 = 0.1% Sep 11 · 73 / 85552 = 0.1% Sep 12 · 35 / 56764 = 0.1% Sep 13 · 55 / 57989 = 0.1% Sep 14 · 53 / 59224 = 0.1% Sep 15 · 36 / 58180 = 0.1% Sep 16 · 46 / 58965 = 0.1% Sep 17 · 48 / 56747 = 0.1% Sep 18 · 47 / 53080 = 0.1% Sep 19 · 33 / 45270 = 0.1% Sep 20 · 40 / 44755 = 0.1% Sep 21 · 42 / 51661 = 0.1% Sep 22 · 42 / 55402 = 0.1% Sep 23 · 38 / 58308 = 0.1% Sep 24 · 48 / 53459 = 0.1% Sep 25 · 44 / 50759 = 0.1% Sep 26 · 101 / 101516 = 0.1% Sep 27 · 65 / 52131 = 0.1% Sep 28 · 62 / 61107 = 0.1% Sep 29 · 86 / 77850 = 0.1% Sep 30 · 72 / 69709 = 0.1% Oct 1 · 65 / 69222 = 0.1% Oct 2 · 68 / 64730 = 0.1% Oct 3 · 47 / 53733 = 0.1% Oct 4 · 55 / 52052 = 0.1% Oct 5 · 66 / 63687 = 0.1% Oct 6 · 80 / 67585 = 0.1% Oct 7 · 85 / 67656 = 0.1% Oct 8 · 50 / 69310 = 0.1% Oct 9 · 70 / 70361 = 0.1% Oct 10 · 58 / 60636 = 0.1% Oct 11 · 65 / 65593 = 0.1% Oct 12 · 58 / 66628 = 0.1% Oct 13 · 72 / 70942 = 0.1% Oct 14 · 71 / 70655 = 0.1% Oct 15 · 93 / 93489 = 0.1%
Mar 30, 2026 90 days Oct 15, 2026

The shaded areas were measured against a different set of sites, so the line can step there without Uvicorn itself changing.

Coverage details

Before the dashed line where the dots begin, the line is a weekly average. After it, the last 90 days are shown one day at a time.

Grey: before 8 July 2026, we only tracked launches from launch platforms. From that date we crawl the wider web as well.

Amber: 8 July to 10 September 2026, before we improved our infrastructure to index new sites much sooner, often on the day they go live. Sites found that early often haven't finished setting up, so anything usually added after launch reads lower from 10 September. We record each site as it was when we found it.

The share is a proportion of whatever we were tracking at the time. For a single continuous measure, switch to launch platforms.

How StackScope detects technologies

What kind of sites use Uvicorn

1,727 sites with a known type, all time

Developer Tools
16.9%
Finance
12.5%
AI
11.4%
Productivity
9.3%
Content
7.7%
Games
6.9%
Health
6.4%
Marketing
6.1%
Education
6.0%
E-commerce
5.7%
Social
4.4%
Hiring & HR
2.8%
Crypto
2.0%
Design
1.2%
Directory
0.8%

Domain endings using Uvicorn

4,891 sites, all time

  • .com 43.5%
  • .app 7.4%
  • .online 6.0%
  • .xyz 4.0%
  • .ai 3.3%
  • .org 3.1%
  • .site 3.1%
  • .tech 2.9%
  • .fr 2.8%
  • .net 2.4%
  • .dev 2.3%
  • .io 2.3%
  • .cloud 2.0%
  • .in 1.9%
  • .space 1.7%

Country

Country likely for 566 of 4,906 sites (11.5%), all time.

How we know

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.

  • France France 24.7%
  • India India 15.9%
  • United Kingdom United Kingdom 8.7%
  • South Korea South Korea 6.7%
  • United States United States 6.7%
  • Canada Canada 5.7%
  • Switzerland Switzerland 4.1%
  • Germany Germany 3.7%
  • Japan Japan 2.7%
  • Brazil Brazil 2.5%
  • Russia Russia 2.1%
  • Sweden Sweden 1.9%
  • Ukraine Ukraine 1.8%
  • Spain Spain 1.4%
  • Poland Poland 1.4%

Green hosting

138 checked sites since Apr 2026.

What this means

The share whose web host The Green Web Foundation lists as running on green energy, against the average for every new site we checked.

  • Uvicorn 40%
  • Average 47%

Server leaders

Tool % of sitesall time % of categoryall time
#1 – nginx 9.5% 37.3%
#2 – LiteSpeed Web Server 6.6% 26.0%
#3 – Apache 4.7% 18.2%
#4 – Caddy 3.0% 11.6%
#5 – OpenResty 0.9% 3.5%
…
#9 – Uvicorn Current page 0.1% 0.3%

Percentages show all-time adoption across the new sites we track: the share of all of them, and of the sites using any Server tool. All 140 in Server →

Often used with

Tool Sites vs all new sites
Caddy 3,464 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.

Recent launches using Uvicorn

1,711 of the 4,906 sites using Uvicorn are product launches we list individually. The other 3,195 are sites we found crawling the wider web: they count towards the figures above, but we do not publish them one by one. They are included in the StackScope API and in Stackdar alerts. How StackScope Discovery works

Reelvaro — Product photos into your next reel. Oct 16, 2026 Also detected Cloudflare DNS Namecheap Email Forwarding Python Driver Portal Oct 16, 2026 Also detected Caddy Cloudflare DNS Leaflet OpenStreetMap Evixos — Trợ lý hỗ trợ doanh nghiệp Oct 16, 2026 Also detected Caddy Google Fonts Python DeskGate Schweiz · Kognitives Betriebssystem für TARDOC-Liquidität · DeskGate, Inc. Oct 16, 2026 Also detected Cloudflare DNS Google Fonts Python YouTube StreamCutter – Aus deinem Stream werden fertige YouTube-Folgen und Shorts Oct 16, 2026 · Content Also detected Caddy Easyname Email Python Lesson Speaking Oct 16, 2026 · Education Also detected Caddy Hostinger DNS Lucide Icons Python Findmee: elke week blogs en LinkedIn die gevonden worden Oct 16, 2026 · AI Also detected Cloudflare Turnstile Google Fonts Mollie Python KlivAudio - Clean audio for every voice-over workflow Oct 16, 2026 · Content Also detected Cloudflare DNS Fontshare Google Fonts Namecheap Email Forwarding Realty Assist — ваш партнёр в посуточном бизнесе Oct 16, 2026 Also detected Caddy Dyna-NS Python Mika Garage — Tu taller en el móvil Oct 16, 2026 · Productivity Also detected Brevo Caddy Namecheap DNS Namecheap Email Forwarding Market Consultant — ask about any company Oct 16, 2026 · Finance Also detected Caddy Google Fonts Namecheap DNS Namecheap Email Forwarding DispoAlerte Oct 16, 2026 Also detected Brevo Caddy Google Fonts OVH DNS

Showing the most recent 12 of 1,711.

The StackScope API serves all 4,906 sites using Uvicorn, filterable and exportable, from £15 a month.

Something not look right? If a technology shown here is wrong or out of date, email [email protected] and we'll review it.