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core-js vs Envoy

Based on 1747 and 92 real audits

View core-js details | View Envoy details
Metriccore-jsEnvoyWinner
Performance3736core-js
Accessibility8889Envoy
Best Practices8586Envoy
SEO9193Envoy
Security6668Envoy
TTFB424ms287msEnvoy
Composite7374Envoy
Performance
core-js
37
Envoy
36
Accessibility
core-js
88
Envoy
89
Security
core-js
66
Envoy
68
SEO
core-js
91
Envoy
93
Composite
core-js
73
Envoy
74

Envoy outperforms core-js in 6 of 7 categories, with a stronger composite score (74 vs 73). core-js leads in performance.

When to choose core-js

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

When to choose Envoy

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

How this comparison was built

Scores are medians across 1747 audited core-js sites and 92 audited Envoy 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 Envoy?
Based on real BeaverCheck audits, core-js sites score higher on Lighthouse performance (37 vs 36 on average).
Which has better security, core-js or Envoy?
Envoy sites score higher on security analysis (68 vs 66 on average).
Which has better accessibility, core-js or Envoy?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor Envoy (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 Envoy?
Envoy sites score higher on Lighthouse SEO signals (93 vs 91 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 Envoy?
Envoy sites show lower Time to First Byte (287 ms vs 424 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 Envoy for my website?
Both platforms have trade-offs. core-js 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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