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Amazon S3 vs Microsoft

Based on 234 and 2465 real audits

View Amazon S3 details | View Microsoft details
MetricAmazon S3MicrosoftWinner
Performance3839Microsoft
Accessibility8989Tie
Best Practices8586Microsoft
SEO9289Amazon S3
Security6967Amazon S3
TTFB237ms329msAmazon S3
Composite7373Tie
Performance
Amazon S3
38
Microsoft
39
Accessibility
Amazon S3
89
Microsoft
89
Security
Amazon S3
69
Microsoft
67
SEO
Amazon S3
92
Microsoft
89
Composite
Amazon S3
73
Microsoft
73

Amazon S3 outperforms Microsoft in 3 of 7 categories, with a stronger composite score (73 vs 73). Microsoft leads in performance, best practices.

When to choose Amazon S3

Choose Amazon S3 when your primary concern is server response time and SEO. Its audit data shows consistent strength in these areas across the sampled sites.

When to choose Microsoft

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

How this comparison was built

Scores are medians across 234 audited Amazon S3 sites and 2465 audited Microsoft 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, Amazon S3 or Microsoft?
Based on real BeaverCheck audits, Microsoft sites score higher on Lighthouse performance (39 vs 38 on average).
Which has better security, Amazon S3 or Microsoft?
Amazon S3 sites score higher on security analysis (69 vs 67 on average).
Which has better accessibility, Amazon S3 or Microsoft?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor Amazon S3 (89 vs 89). 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, Amazon S3 or Microsoft?
Amazon S3 sites score higher on Lighthouse SEO signals (92 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), Amazon S3 or Microsoft?
Amazon S3 sites show lower Time to First Byte (237 ms vs 329 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 Amazon S3 or Microsoft for my website?
Both platforms have trade-offs. Microsoft scores higher on overall composite score while Amazon S3 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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