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ASP.NET vs Microsoft IIS

Based on 69 and 72 real audits

View ASP.NET details | View Microsoft IIS details
MetricASP.NETMicrosoft IISWinner
Performance4645ASP.NET
Accessibility8487Microsoft IIS
Best Practices8585Tie
SEO8990Microsoft IIS
Security6767Tie
TTFB611ms547msMicrosoft IIS
Composite7372ASP.NET
Performance
ASP.NET
46
Microsoft IIS
45
Accessibility
ASP.NET
84
Microsoft IIS
87
Security
ASP.NET
67
Microsoft IIS
67
SEO
ASP.NET
89
Microsoft IIS
90
Composite
ASP.NET
73
Microsoft IIS
72

Microsoft IIS outperforms ASP.NET in 3 of 7 categories, with a stronger composite score (72 vs 73). ASP.NET leads in performance, composite score.

When to choose ASP.NET

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

When to choose Microsoft IIS

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

How this comparison was built

Scores are medians across 69 audited ASP.NET sites and 72 audited Microsoft IIS 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, ASP.NET or Microsoft IIS?
Based on real BeaverCheck audits, ASP.NET sites score higher on Lighthouse performance (46 vs 45 on average).
Which has better security, ASP.NET or Microsoft IIS?
ASP.NET sites score higher on security analysis (67 vs 67 on average).
Which has better accessibility, ASP.NET or Microsoft IIS?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor Microsoft IIS (87 vs 84). 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, ASP.NET or Microsoft IIS?
Microsoft IIS sites score higher on Lighthouse SEO signals (90 vs 89 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), ASP.NET or Microsoft IIS?
Microsoft IIS sites show lower Time to First Byte (547 ms vs 611 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 ASP.NET or Microsoft IIS for my website?
Both platforms have trade-offs. ASP.NET scores higher on overall composite score while ASP.NET 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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