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HSTS vs Twenty Fifteen

Based on 2599 and 1 real audits

View HSTS details | View Twenty Fifteen details
MetricHSTSTwenty FifteenWinner
Performance4861Twenty Fifteen
Accessibility8980HSTS
Best Practices8896Twenty Fifteen
SEO9192Twenty Fifteen
Security7062HSTS
TTFB365ms79msTwenty Fifteen
Composite7580Twenty Fifteen
Performance
HSTS
48
Twenty Fifteen
61
Accessibility
HSTS
89
Twenty Fifteen
80
Security
HSTS
70
Twenty Fifteen
62
SEO
HSTS
91
Twenty Fifteen
92
Composite
HSTS
75
Twenty Fifteen
80

Twenty Fifteen outperforms HSTS in 5 of 7 categories, with a stronger composite score (80 vs 75). HSTS leads in accessibility, security.

When to choose HSTS

Choose HSTS when your primary concern is accessibility and security. Its audit data shows consistent strength in these areas across the sampled sites.

When to choose Twenty Fifteen

Choose Twenty Fifteen when your primary concern is server response time and performance. Its audit data shows consistent strength in these areas across the sampled sites.

How this comparison was built

Scores are medians across 2599 audited HSTS sites and 1 audited Twenty Fifteen 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, HSTS or Twenty Fifteen?
Based on real BeaverCheck audits, Twenty Fifteen sites score higher on Lighthouse performance (61 vs 48 on average).
Which has better security, HSTS or Twenty Fifteen?
HSTS sites score higher on security analysis (70 vs 62 on average).
Which has better accessibility, HSTS or Twenty Fifteen?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor HSTS (89 vs 80). 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, HSTS or Twenty Fifteen?
Twenty Fifteen sites score higher on Lighthouse SEO signals (92 vs 91 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), HSTS or Twenty Fifteen?
Twenty Fifteen sites show lower Time to First Byte (79 ms vs 365 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 HSTS or Twenty Fifteen for my website?
Both platforms have trade-offs. Twenty Fifteen scores higher on overall composite score while HSTS 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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