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33Across vs AppNexus

Based on 14 and 78 real audits

View 33Across details | View AppNexus details
Metric33AcrossAppNexusWinner
Performance2931AppNexus
Accessibility8687AppNexus
Best Practices7778AppNexus
SEO9092AppNexus
Security666433Across
TTFB311ms337ms33Across
Composite727133Across
Performance
33Across
29
AppNexus
31
Accessibility
33Across
86
AppNexus
87
Security
33Across
66
AppNexus
64
SEO
33Across
90
AppNexus
92
Composite
33Across
72
AppNexus
71

AppNexus outperforms 33Across in 4 of 7 categories, with a stronger composite score (71 vs 72). 33Across leads in security, TTFB, composite score.

When to choose 33Across

Choose 33Across when your primary concern is server response time and security. Its audit data shows consistent strength in these areas across the sampled sites.

When to choose AppNexus

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

How this comparison was built

Scores are medians across 14 audited 33Across sites and 78 audited AppNexus 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, 33Across or AppNexus?
Based on real BeaverCheck audits, AppNexus sites score higher on Lighthouse performance (31 vs 29 on average).
Which has better security, 33Across or AppNexus?
33Across sites score higher on security analysis (66 vs 64 on average).
Which has better accessibility, 33Across or AppNexus?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor AppNexus (87 vs 86). 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, 33Across or AppNexus?
AppNexus sites score higher on Lighthouse SEO signals (92 vs 90 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), 33Across or AppNexus?
33Across sites show lower Time to First Byte (311 ms vs 337 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 33Across or AppNexus for my website?
Both platforms have trade-offs. AppNexus scores higher on overall composite score while 33Across 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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