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Bootstrap vs mobile-detect.js

Based on 1010 and 3 real audits

View Bootstrap details | View mobile-detect.js details
MetricBootstrapmobile-detect.jsWinner
Performance4745Bootstrap
Accessibility8789mobile-detect.js
Best Practices8877Bootstrap
SEO9083Bootstrap
Security6675mobile-detect.js
TTFB441ms80msmobile-detect.js
Composite7476mobile-detect.js
Performance
Bootstrap
47
mobile-detect.js
45
Accessibility
Bootstrap
87
mobile-detect.js
89
Security
Bootstrap
66
mobile-detect.js
75
SEO
Bootstrap
90
mobile-detect.js
83
Composite
Bootstrap
74
mobile-detect.js
76

mobile-detect.js outperforms Bootstrap in 4 of 7 categories, with a stronger composite score (76 vs 74). Bootstrap leads in performance, best practices, SEO.

When to choose Bootstrap

Choose Bootstrap when your primary concern is best practices and SEO. Its audit data shows consistent strength in these areas across the sampled sites.

When to choose mobile-detect.js

Choose mobile-detect.js when your primary concern is server response time and security. Its audit data shows consistent strength in these areas across the sampled sites.

How this comparison was built

Scores are medians across 1010 audited Bootstrap sites and 3 audited mobile-detect.js sites in the BeaverCheck database. Every audit runs the same 100+ checks — Lighthouse performance, security headers, accessibility, SEO, server response time — against a real URL. No vendor input, no sponsorship, no affiliate links. Read the full methodology →

Small sample: one or both technologies have fewer than 10 audited sites. Treat these numbers as directional — medians stabilize around 20–30 audits per side.

FAQ

Which is faster, Bootstrap or mobile-detect.js?
Based on real BeaverCheck audits, Bootstrap sites score higher on Lighthouse performance (47 vs 45 on average).
Which has better security, Bootstrap or mobile-detect.js?
mobile-detect.js sites score higher on security analysis (75 vs 66 on average).
Which has better accessibility, Bootstrap or mobile-detect.js?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor mobile-detect.js (89 vs 87). Both technologies can be made fully accessible with care — the difference reflects common patterns in the sampled sites, not inherent platform limits.
Which is better for SEO, Bootstrap or mobile-detect.js?
Bootstrap sites score higher on Lighthouse SEO signals (90 vs 83 on average), which cover meta tags, crawlability, mobile friendliness, and structured data. Content strategy and backlinks still matter more than platform choice for ranking.
Which has faster server response (TTFB), Bootstrap or mobile-detect.js?
mobile-detect.js sites show lower Time to First Byte (80 ms vs 441 ms on average). TTFB depends heavily on hosting and CDN setup rather than the technology itself, but the sampled sites suggest a meaningful difference in common deployment patterns.
Should I choose Bootstrap or mobile-detect.js for my website?
Both platforms have trade-offs. Bootstrap scores higher on overall composite score while Bootstrap may excel in metrics you care about most. Run a free BeaverCheck audit on a real site using each to compare the metrics relevant to your use case.
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