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AppNexus vs Fast Simon

Based on 78 and 1 real audits

View AppNexus details | View Fast Simon details
MetricAppNexusFast SimonWinner
Performance3121AppNexus
Accessibility8792Fast Simon
Best Practices7877AppNexus
SEO9285AppNexus
Security6471Fast Simon
TTFB337ms180msFast Simon
Composite7172Fast Simon
Performance
AppNexus
31
Fast Simon
21
Accessibility
AppNexus
87
Fast Simon
92
Security
AppNexus
64
Fast Simon
71
SEO
AppNexus
92
Fast Simon
85
Composite
AppNexus
71
Fast Simon
72

Fast Simon outperforms AppNexus in 4 of 7 categories, with a stronger composite score (72 vs 71). AppNexus leads in performance, best practices, SEO.

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.

When to choose Fast Simon

Choose Fast Simon 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 78 audited AppNexus sites and 1 audited Fast Simon 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, AppNexus or Fast Simon?
Based on real BeaverCheck audits, AppNexus sites score higher on Lighthouse performance (31 vs 21 on average).
Which has better security, AppNexus or Fast Simon?
Fast Simon sites score higher on security analysis (71 vs 64 on average).
Which has better accessibility, AppNexus or Fast Simon?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor Fast Simon (92 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 Fast Simon?
AppNexus sites score higher on Lighthouse SEO signals (92 vs 85 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 Fast Simon?
Fast Simon sites show lower Time to First Byte (180 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 AppNexus or Fast Simon for my website?
Both platforms have trade-offs. AppNexus 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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