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core-js vs Microsoft

Based on 1930 and 2572 real audits

View core-js details | View Microsoft details
Metriccore-jsMicrosoftWinner
Performance3740Microsoft
Accessibility8889Microsoft
Best Practices8586Microsoft
SEO9189core-js
Security6867core-js
TTFB476ms337msMicrosoft
Composite7473core-js
Performance
core-js
37
Microsoft
40
Accessibility
core-js
88
Microsoft
89
Security
core-js
68
Microsoft
67
SEO
core-js
91
Microsoft
89
Composite
core-js
74
Microsoft
73

Microsoft outperforms core-js in 4 of 7 categories, with a stronger composite score (73 vs 74). core-js leads in SEO, security, composite score.

When to choose core-js

Choose core-js when your primary concern is SEO and security. 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 1930 audited core-js sites and 2572 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 (40 vs 37 on average).
Which has better security, core-js or Microsoft?
core-js sites score higher on security analysis (68 vs 67 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 (337 ms vs 476 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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