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core-js vs Mimecast

Based on 1582 and 145 real audits

View core-js details | View Mimecast details
Metriccore-jsMimecastWinner
Performance3638Mimecast
Accessibility8890Mimecast
Best Practices8487Mimecast
SEO9186core-js
Security6566Mimecast
TTFB374ms255msMimecast
Composite7273Mimecast
Performance
core-js
36
Mimecast
38
Accessibility
core-js
88
Mimecast
90
Security
core-js
65
Mimecast
66
SEO
core-js
91
Mimecast
86
Composite
core-js
72
Mimecast
73

Mimecast outperforms core-js in 6 of 7 categories, with a stronger composite score (73 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 Mimecast

Choose Mimecast when your primary concern is server response time 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 1582 audited core-js sites and 145 audited Mimecast 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 Mimecast?
Based on real BeaverCheck audits, Mimecast sites score higher on Lighthouse performance (38 vs 36 on average).
Which has better security, core-js or Mimecast?
Mimecast sites score higher on security analysis (66 vs 65 on average).
Which has better accessibility, core-js or Mimecast?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor Mimecast (90 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 Mimecast?
core-js sites score higher on Lighthouse SEO signals (91 vs 86 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 Mimecast?
Mimecast sites show lower Time to First Byte (255 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 Mimecast for my website?
Both platforms have trade-offs. Mimecast 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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