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core-js vs Microsoft

Based on 1582 and 2421 real audits

View core-js details | View Microsoft details
Metriccore-jsMicrosoftWinner
Performance3639Microsoft
Accessibility8889Microsoft
Best Practices8486Microsoft
SEO9189core-js
Security6566Microsoft
TTFB374ms329msMicrosoft
Composite7272Tie
Performance
core-js
36
Microsoft
39
Accessibility
core-js
88
Microsoft
89
Security
core-js
65
Microsoft
66
SEO
core-js
91
Microsoft
89
Composite
core-js
72
Microsoft
72

Microsoft outperforms core-js in 5 of 7 categories, with a stronger composite score (72 vs 72). core-js leads in SEO.

When to choose core-js

Choose core-js when your primary concern is 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 server response time and performance. Its audit data shows consistent strength in these areas across the sampled sites.

How this comparison was built

Scores are medians across 1582 audited core-js sites and 2421 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, core-js or Microsoft?
Based on real BeaverCheck audits, Microsoft sites score higher on Lighthouse performance (39 vs 36 on average).
Which has better security, core-js or Microsoft?
Microsoft sites score higher on security analysis (66 vs 65 on average).
Which has better accessibility, core-js or Microsoft?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor Microsoft (89 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, core-js or Microsoft?
core-js sites score higher on Lighthouse SEO signals (91 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), core-js or Microsoft?
Microsoft sites show lower Time to First Byte (329 ms vs 374 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 core-js or Microsoft for my website?
Both platforms have trade-offs. Microsoft scores higher on overall composite score while core-js 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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