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Bootstrap on new websites

Open-source CSS and JavaScript component library originally built at Twitter for responsive UI layouts.

#2 of 32 in CSS Framework In our data since Apr 2026 Last seen: Oct 16, 2026 Most recent launch: Gestionale per studi medici e liste operatorie | ClinicaDesk, Oct 16, 2026 Website: getbootstrap.com

249,476 sites

246,881 found by StackScope, 2,595 via launch platforms

StackScope Wider Web 240,819 StackScope Discovery (Indie) 6,062 Product Hunt 2,239 PeerPush 153 Hacker News 120 Other 83
  • StackScope Wider Web 240,819
  • StackScope Discovery (Indie) 6,062
  • Product Hunt 2,239
  • PeerPush 153
  • Hacker News 120
  • Other 83
View: All sites All launches Launch platforms StackScope Discovery StackScope Wider Web

About 1 in 25 websites that went live in the last 30 days were built with Bootstrap (3.8%).

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

Extended by
Bootbox.js 0.4% eModal <0.1%
Built on Bootstrap
Helix Ultimate 0.2% Helix3 <0.1% Canvas <0.1% Start Bootstrap <0.1% Understrap <0.1%
and 8 more
LMS Education <0.1% Simple Life <0.1% Sparkling <0.1% Argon Design System <0.1% Bootscore <0.1% bslib <0.1% Front by Htmlstream <0.1% Blazor Bootstrap <0.1%

Percentages are the all-time share of Bootstrap sites that also use each one.

Stackdar alerts

Get told when a new site ships with Bootstrap.

72,225 new sites with Bootstrap first seen in the last 30 days.

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

See how alerts work

Share of new sites using Bootstrap

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

3.7%
last 7 days
+0.0pp vs prior week
3.8%
30 days to Oct 15
-0.9pp vs 30 days before
249,476
sites all time
since Apr 2026
Bootstrap 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. 6% 3% 0% Apr May Jun Jul Aug Sep Oct Weekly averages before this point, daily after. Jul 18 · 1043 / 24609 = 4.2% Jul 19 · 1047 / 27593 = 3.8% Jul 20 · 789 / 23834 = 3.3% Jul 21 · 936 / 22939 = 4.1% Jul 22 · 1100 / 24370 = 4.5% Jul 23 · 665 / 18096 = 3.7% Jul 24 · 486 / 13976 = 3.5% Jul 25 · 335 / 9549 = 3.5% Jul 26 · 824 / 21745 = 3.8% Jul 27 · 1555 / 37226 = 4.2% Jul 28 · 1852 / 41880 = 4.4% Jul 29 · 2156 / 53556 = 4.0% Jul 30 · 2122 / 48247 = 4.4% Jul 31 · 2502 / 56047 = 4.5% Aug 1 · 2492 / 54880 = 4.5% Aug 2 · 2592 / 53845 = 4.8% Aug 3 · 2368 / 52612 = 4.5% Aug 4 · 2054 / 40700 = 5.0% Aug 5 · 1811 / 35345 = 5.1% Aug 6 · 1691 / 39147 = 4.3% Aug 7 · 1890 / 40246 = 4.7% Aug 8 · 2086 / 42802 = 4.9% Aug 9 · 1620 / 37772 = 4.3% Aug 10 · 1629 / 32322 = 5.0% Aug 11 · 1570 / 34554 = 4.5% Aug 12 · 1495 / 37131 = 4.0% Aug 13 · 2756 / 55464 = 5.0% Aug 14 · 3017 / 56751 = 5.3% Aug 15 · 2678 / 55905 = 4.8% Aug 16 · 2501 / 56267 = 4.4% Aug 17 · 1927 / 45391 = 4.2% Aug 18 · 2502 / 56519 = 4.4% Aug 19 · 2333 / 51663 = 4.5% Aug 20 · 3160 / 68939 = 4.6% Aug 21 · 4333 / 93833 = 4.6% Aug 22 · 4866 / 94184 = 5.2% Aug 23 · 4455 / 93580 = 4.8% Aug 24 · 4039 / 81702 = 4.9% Aug 25 · 3689 / 71523 = 5.2% Aug 26 · 3388 / 66852 = 5.1% Aug 27 · 4032 / 87822 = 4.6% Aug 28 · 4096 / 87900 = 4.7% Aug 29 · 4571 / 88057 = 5.2% Aug 30 · 4660 / 100664 = 4.6% Aug 31 · 4432 / 100233 = 4.4% Sep 1 · 4976 / 103410 = 4.8% Sep 2 · 5226 / 108908 = 4.8% Sep 3 · 4892 / 103273 = 4.7% Sep 4 · 4735 / 98525 = 4.8% Sep 5 · 5200 / 102849 = 5.1% Sep 6 · 4330 / 89270 = 4.9% Sep 7 · 4450 / 86115 = 5.2% Sep 8 · 3445 / 77960 = 4.4% Sep 9 · 3835 / 75504 = 5.1% Sep 10 · 4318 / 83627 = 5.2% Sep 11 · 3692 / 85538 = 4.3% Sep 12 · 2481 / 56758 = 4.4% Sep 13 · 2336 / 57984 = 4.0% Sep 14 · 2480 / 59221 = 4.2% Sep 15 · 2503 / 58178 = 4.3% Sep 16 · 2562 / 58891 = 4.4% Sep 17 · 2481 / 56736 = 4.4% Sep 18 · 2262 / 53075 = 4.3% Sep 19 · 1841 / 45261 = 4.1% Sep 20 · 1722 / 44745 = 3.8% Sep 21 · 2075 / 51656 = 4.0% Sep 22 · 2443 / 55396 = 4.4% Sep 23 · 2402 / 58298 = 4.1% Sep 24 · 2270 / 53448 = 4.2% Sep 25 · 1859 / 50749 = 3.7% Sep 26 · 3519 / 101511 = 3.5% Sep 27 · 1674 / 52126 = 3.2% Sep 28 · 2364 / 61097 = 3.9% Sep 29 · 2990 / 77839 = 3.8% Sep 30 · 2679 / 69702 = 3.8% Oct 1 · 2676 / 69212 = 3.9% Oct 2 · 2234 / 64659 = 3.5% Oct 3 · 1692 / 53720 = 3.1% Oct 4 · 1576 / 52039 = 3.0% Oct 5 · 2701 / 63678 = 4.2% Oct 6 · 2683 / 67571 = 4.0% Oct 7 · 2501 / 67635 = 3.7% Oct 8 · 2653 / 69285 = 3.8% Oct 9 · 2661 / 70262 = 3.8% Oct 10 · 2281 / 60621 = 3.8% Oct 11 · 2201 / 65581 = 3.4% Oct 12 · 2611 / 66602 = 3.9% Oct 13 · 2562 / 70810 = 3.6% Oct 14 · 2666 / 70598 = 3.8% Oct 15 · 3384 / 93141 = 3.6%
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 Bootstrap 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 Bootstrap

57,895 sites with a known type, all time

E-commerce
26.3%
Health
16.7%
Education
10.5%
Finance
9.4%
Content
5.8%
Marketing
5.4%
Developer Tools
5.4%
Games
4.6%
Productivity
4.4%
Social
3.6%
Design
2.6%
Hiring & HR
2.0%
AI
1.3%
Directory
1.1%
Crypto
0.9%

Domain endings using Bootstrap

249,412 sites, all time

  • .com 62.0%
  • .in 7.6%
  • .online 5.3%
  • .org 3.4%
  • .site 2.5%
  • .uk 2.4%
  • .net 2.0%
  • .fr 1.7%
  • .ca 1.4%
  • .store 1.2%
  • .xyz 0.8%
  • .co 0.8%
  • .app 0.6%
  • .space 0.5%
  • .pro 0.5%

Country

Country likely for 43,655 of 249,476 sites (17.5%), 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.

  • India India 30.0%
  • United Kingdom United Kingdom 12.3%
  • France France 9.8%
  • United States United States 9.2%
  • Canada Canada 5.7%
  • Vietnam Vietnam 2.8%
  • Brazil Brazil 2.8%
  • Australia Australia 2.4%
  • Türkiye Türkiye 2.0%
  • Poland Poland 1.9%
  • Japan Japan 1.9%
  • Germany Germany 1.8%
  • Switzerland Switzerland 1.7%
  • Sweden Sweden 1.6%
  • Italy Italy 1.6%

Green hosting

2,593 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.

  • Bootstrap 52%
  • Average 47%

CSS Framework leaders

Tool % of sitesall time % of categoryall time
#1 – Tailwind CSS 24.7% 86.3%
#2 – Bootstrap Current page 4.3% 15.1%
#3 – UIkit 0.1% 0.4%
#4 – Layui <0.1% 0.1%
#5 ▼1 Materialize <0.1% <0.1%

Percentages show all-time adoption across the new sites we track: the share of all of them, and of the sites using any CSS Framework tool. All 32 in CSS Framework → Related categories: UI Library

Often used with

Tool Sites vs all new sites
jsDelivr 82,683 7.5x
Font Awesome 90,306 5.4x
jQuery 157,517 4.4x
PHP 119,995 2.9x
WordPress 66,492 2.1x

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

Recent launches using Bootstrap

8,657 of the 249,476 sites using Bootstrap are product launches we list individually. The other 240,819 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

Gestionale per studi medici e liste operatorie | ClinicaDesk Oct 16, 2026 · Health Also detected ASP.NET Aruba DNS Aruba Mail Bootstrap Icons Rollie · Put a number on your beliefs. Rollie handles the trading. Oct 16, 2026 · Finance Also detected Next.js React AWS Route 53 Clerk Tour Glide — Tour Studio Oct 16, 2026 Also detected Clerk Google Cloud Hostpoint DNS Hostpoint Email AI Stem Separator: split a song into vocals, drums, bass | Code of the Geeks Oct 16, 2026 · Content Also detected Google Ads Google Funding Choices Strato DNS Tailwind CSS ScandiStops · By crew, for crew Oct 16, 2026 · Hiring & HR Also detected Apache one.com PHP Varnish DirDocs · 我的文档 Oct 16, 2026 · AI Also detected Cloudflare Spectre PDF — The intelligent PDF platform Oct 16, 2026 · Productivity Also detected Next.js React Vercel Clerk FlowState Budgeting Oct 16, 2026 · Finance Also detected React Clerk Cloudflare Lucide Icons FSRdp – Remote support on your own server Oct 16, 2026 Also detected ASP.NET jQuery Bootbox.js GoDaddy DNS Rozvin — Learn Today, Build Your Future | Rozvin Academy Oct 16, 2026 · Education Also detected Google Fonts HostIran DNS NotifyWay — Make room for life. We’ll remember. Oct 16, 2026 · Productivity Also detected Laravel Brevo Cloudflare Facebook Domain Verification Simple Profit and Loss Statement App for Small Businesses | pnlstorm Oct 16, 2026 · Finance Also detected Next.js React Vercel Apple iCloud Mail

Showing the most recent 12 of 8,657.

The StackScope API serves all 249,476 sites using Bootstrap, 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.