| Metric | Microsoft | Mountain | Winner |
|---|---|---|---|
| Performance | 39 | 34 | Microsoft |
| Accessibility | 89 | 90 | Mountain |
| Best Practices | 86 | 77 | Microsoft |
| SEO | 89 | 92 | Mountain |
| Security | 66 | 61 | Microsoft |
| TTFB | 329ms | 432ms | Microsoft |
| Composite | 72 | 71 | Microsoft |
Microsoft outperforms Mountain in 5 of 7 categories, with a stronger composite score (72 vs 71). Mountain leads in accessibility, SEO.
Choose Microsoft when your primary concern is server response time and best practices. Its audit data shows consistent strength in these areas across the sampled sites.
Choose Mountain when your primary concern is SEO and accessibility. Its audit data shows consistent strength in these areas across the sampled sites.
Scores are medians across 2421 audited Microsoft sites and 13 audited Mountain 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 →
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