Open-source CSS and JavaScript component library originally built at Twitter for responsive UI layouts.
Get told when a new site ships with Bootstrap.
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 work110,912 sites
109,024 found by StackScope, 1,888 via launch platforms
- StackScope Wider Web 105,654
- StackScope Discovery (Indie) 3,370
- Product Hunt 1,645
- PeerPush 128
- Hacker News 89
- Other 26
Bootstrap has been detected on 110,912 launches we've crawled. The 7-day rolling share is 4.8%, roughly steady week on week. Most recent detection: Tower Merge Download - Build Your Golden Skyscraper Empire Today, today.
It's most commonly paired with Google Analytics, Google Search Console, and jsDelivr. By product type, the launches using it are most often E-commerce (24%), Health (15%), and Education (12%). By estimated origin, India (30%) and the United States (23%) lead close together. By domain ending, launches using it are 3.5 times as likely as the average launch to live on a .store domain.
What kind of products ship with Bootstrap
26,386 launches
Domain endings using Bootstrap
109,645 sites
- .com 53.87%
- .in 11.28%
- .online 7.34%
- .org 3.87%
- .site 3.85%
- .uk 2.32%
- .net 1.78%
- .store 1.68%
- .ca 1.59%
- .xyz 1.40%
- .co 1.14%
- .space 0.89%
- .tech 0.85%
- .app 0.83%
- .us 0.56%
Country
351 of 110,912 sites, where we are confident of the country.
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India 30.20%
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United States 23.08%
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United Kingdom 9.69%
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Canada 4.56%
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Australia 3.13%
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Netherlands 2.85%
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United Arab Emirates 2.28%
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Singapore 2.28%
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Brazil 1.42%
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Germany 1.42%
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France 1.14%
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Romania 1.14%
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Nigeria 0.85%
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Poland 0.85%
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Portugal 0.85%
Share of new sites using Bootstrap
Each dot is one launch day. Line is the 7-day rolling average; weekly averages before June 2026.
The shaded part of the chart is measured against a different set of sites. Until 8 July 2026 we only tracked launches from launch platforms; from that date we crawl the wider web as well. The share is a proportion of whatever we were tracking at the time, so it can step at that line without the technology itself changing. For a single continuous measure, switch to launch platforms.
How StackScope detects technologies
⋮ Jun 22, 2026: Improved detection coverage for this technology.
⋮ Jul 1, 2026: Adoption figures now count launches from launch platforms. Use the source view to include StackScope Discovery.
CSS Framework leaders
| Tool | % of launches | % of category | ||
|---|---|---|---|---|
| #1 | – |
|
24.96% | 87.45% |
| #2 | – |
|
4.04% | 14.14% |
| #3 | – |
|
0.04% | 0.15% |
| #4 | ▼1 |
|
0.02% | 0.07% |
| #5 | ▼2 |
|
<0.01% | 0.02% |
Percentages show adoption among indie launches: the share of all analysed launches, and of launches using any CSS Framework tool. All 25 in CSS Framework →
Recent launches we can show
5,258 of the 110,912 sites using Bootstrap are product launches we list individually. The other 105,654 are sites we found crawling the wider web: they count towards the figures above, but we do not publish them one by one. How StackScope Discovery works
Showing the most recent 12 of 5,258.
The StackScope API serves all 110,912 sites using Bootstrap, filterable and exportable, from £15 a month.