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IIS vs Microsoft ASP.NET

Based on 65 and 124 real audits

View IIS details | View Microsoft ASP.NET details
MetricIISMicrosoft ASP.NETWinner
Performance4440IIS
Accessibility8888Tie
Best Practices8484Tie
SEO9090Tie
Security6565Tie
TTFB516ms447msMicrosoft ASP.NET
Composite7272Tie
Performance
IIS
44
Microsoft ASP.NET
40
Accessibility
IIS
88
Microsoft ASP.NET
88
Security
IIS
65
Microsoft ASP.NET
65
SEO
IIS
90
Microsoft ASP.NET
90
Composite
IIS
72
Microsoft ASP.NET
72

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

When to choose IIS

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

When to choose Microsoft ASP.NET

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

How this comparison was built

Scores are medians across 65 audited IIS sites and 124 audited Microsoft ASP.NET 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, IIS or Microsoft ASP.NET?
Based on real BeaverCheck audits, IIS sites score higher on Lighthouse performance (44 vs 40 on average).
Which has better security, IIS or Microsoft ASP.NET?
IIS sites score higher on security analysis (65 vs 65 on average).
Which has better accessibility, IIS or Microsoft ASP.NET?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor IIS (88 vs 88). 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, IIS or Microsoft ASP.NET?
IIS 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), IIS or Microsoft ASP.NET?
Microsoft ASP.NET sites show lower Time to First Byte (447 ms vs 516 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 IIS or Microsoft ASP.NET for my website?
Both platforms have trade-offs. IIS scores higher on overall composite score while IIS 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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