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AppNexus vs core-js

Based on 78 and 1582 real audits

View AppNexus details | View core-js details
MetricAppNexuscore-jsWinner
Performance3136core-js
Accessibility8788core-js
Best Practices7884core-js
SEO9291AppNexus
Security6465core-js
TTFB337ms374msAppNexus
Composite7172core-js
Performance
AppNexus
31
core-js
36
Accessibility
AppNexus
87
core-js
88
Security
AppNexus
64
core-js
65
SEO
AppNexus
92
core-js
91
Composite
AppNexus
71
core-js
72

core-js outperforms AppNexus in 5 of 7 categories, with a stronger composite score (72 vs 71). AppNexus leads in SEO, TTFB.

When to choose AppNexus

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

When to choose core-js

Choose core-js when your primary concern is best practices and performance. Its audit data shows consistent strength in these areas across the sampled sites.

How this comparison was built

Scores are medians across 78 audited AppNexus sites and 1582 audited core-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 →

FAQ

Which is faster, AppNexus or core-js?
Based on real BeaverCheck audits, core-js sites score higher on Lighthouse performance (36 vs 31 on average).
Which has better security, AppNexus or core-js?
core-js sites score higher on security analysis (65 vs 64 on average).
Which has better accessibility, AppNexus or core-js?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor core-js (88 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, AppNexus or core-js?
AppNexus 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), AppNexus or core-js?
AppNexus sites show lower Time to First Byte (337 ms vs 374 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 AppNexus or core-js for my website?
Both platforms have trade-offs. core-js scores higher on overall composite score while AppNexus 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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