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HTTP/3 vs Polyfill

Based on 1498 and 7 real audits

View HTTP/3 details | View Polyfill details
MetricHTTP/3PolyfillWinner
Performance5153Polyfill
Accessibility8888Tie
Best Practices8896Polyfill
SEO9081HTTP/3
Security6969Tie
TTFB298ms46msPolyfill
Composite7578Polyfill
Performance
HTTP/3
51
Polyfill
53
Accessibility
HTTP/3
88
Polyfill
88
Security
HTTP/3
69
Polyfill
69
SEO
HTTP/3
90
Polyfill
81
Composite
HTTP/3
75
Polyfill
78

Polyfill outperforms HTTP/3 in 4 of 7 categories, with a stronger composite score (78 vs 75). HTTP/3 leads in SEO.

When to choose HTTP/3

Choose HTTP/3 when your primary concern is SEO. Its audit data shows consistent strength in these areas across the sampled sites.

When to choose Polyfill

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

How this comparison was built

Scores are medians across 1498 audited HTTP/3 sites and 7 audited Polyfill 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, HTTP/3 or Polyfill?
Based on real BeaverCheck audits, Polyfill sites score higher on Lighthouse performance (53 vs 51 on average).
Which has better security, HTTP/3 or Polyfill?
HTTP/3 sites score higher on security analysis (69 vs 69 on average).
Which has better accessibility, HTTP/3 or Polyfill?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor HTTP/3 (88 vs 88). 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, HTTP/3 or Polyfill?
HTTP/3 sites score higher on Lighthouse SEO signals (90 vs 81 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), HTTP/3 or Polyfill?
Polyfill sites show lower Time to First Byte (46 ms vs 298 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 HTTP/3 or Polyfill for my website?
Both platforms have trade-offs. Polyfill scores higher on overall composite score while HTTP/3 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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