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Microsoft ASP.NET vs Microsoft IIS

Based on 125 and 66 real audits

View Microsoft ASP.NET details | View Microsoft IIS details
MetricMicrosoft ASP.NETMicrosoft IISWinner
Performance4145Microsoft IIS
Accessibility8887Microsoft ASP.NET
Best Practices8484Tie
SEO9090Tie
Security6566Microsoft IIS
TTFB446ms513msMicrosoft ASP.NET
Composite7272Tie
Performance
Microsoft ASP.NET
41
Microsoft IIS
45
Accessibility
Microsoft ASP.NET
88
Microsoft IIS
87
Security
Microsoft ASP.NET
65
Microsoft IIS
66
SEO
Microsoft ASP.NET
90
Microsoft IIS
90
Composite
Microsoft ASP.NET
72
Microsoft IIS
72

Microsoft ASP.NET and Microsoft IIS are closely matched, each leading in different categories. Microsoft ASP.NET has a composite score of 72 while Microsoft IIS scores 72.

When to choose Microsoft ASP.NET

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

How this comparison was built

Scores are medians across 125 audited Microsoft ASP.NET sites and 66 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, Microsoft ASP.NET or Microsoft IIS?
Based on real BeaverCheck audits, Microsoft IIS sites score higher on Lighthouse performance (45 vs 41 on average).
Which has better security, Microsoft ASP.NET or Microsoft IIS?
Microsoft IIS sites score higher on security analysis (66 vs 65 on average).
Which has better accessibility, Microsoft ASP.NET or Microsoft IIS?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor Microsoft ASP.NET (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, Microsoft ASP.NET or Microsoft IIS?
Microsoft ASP.NET sites score higher on Lighthouse SEO signals (90 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), Microsoft ASP.NET or Microsoft IIS?
Microsoft ASP.NET sites show lower Time to First Byte (446 ms vs 513 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 Microsoft ASP.NET or Microsoft IIS for my website?
Both platforms have trade-offs. Microsoft IIS scores higher on overall composite score while Microsoft 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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