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IIS vs Microsoft ASP.NET

Based on 69 and 134 real audits

View IIS details | View Microsoft ASP.NET details
MetricIISMicrosoft ASP.NETWinner
Performance4541IIS
Accessibility8787Tie
Best Practices8584IIS
SEO9090Tie
Security6666Tie
TTFB527ms477msMicrosoft ASP.NET
Composite7273Microsoft ASP.NET
Performance
IIS
45
Microsoft ASP.NET
41
Accessibility
IIS
87
Microsoft ASP.NET
87
Security
IIS
66
Microsoft ASP.NET
66
SEO
IIS
90
Microsoft ASP.NET
90
Composite
IIS
72
Microsoft ASP.NET
73

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 73.

When to choose IIS

Choose IIS when your primary concern is performance and best practices. 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 69 audited IIS sites and 134 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 (45 vs 41 on average).
Which has better security, IIS or Microsoft ASP.NET?
IIS sites score higher on security analysis (66 vs 66 on average).
Which has better accessibility, IIS or Microsoft ASP.NET?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor IIS (87 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, 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 (477 ms vs 527 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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