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core-js vs Sumo

Based on 1600 and 1 real audits

View core-js details | View Sumo details
Metriccore-jsSumoWinner
Performance3631core-js
Accessibility8876core-js
Best Practices8477core-js
SEO91100Sumo
Security6570Sumo
TTFB379ms488mscore-js
Composite7274Sumo
Performance
core-js
36
Sumo
31
Accessibility
core-js
88
Sumo
76
Security
core-js
65
Sumo
70
SEO
core-js
91
Sumo
100
Composite
core-js
72
Sumo
74

core-js outperforms Sumo in 4 of 7 categories, with a stronger composite score (72 vs 74). Sumo leads in SEO, security, composite score.

When to choose core-js

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

When to choose Sumo

Choose Sumo when your primary concern is SEO and security. Its audit data shows consistent strength in these areas across the sampled sites.

How this comparison was built

Scores are medians across 1600 audited core-js sites and 1 audited Sumo 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 →

Small sample: one or both technologies have fewer than 10 audited sites. Treat these numbers as directional — medians stabilize around 20–30 audits per side.

FAQ

Which is faster, core-js or Sumo?
Based on real BeaverCheck audits, core-js sites score higher on Lighthouse performance (36 vs 31 on average).
Which has better security, core-js or Sumo?
Sumo sites score higher on security analysis (70 vs 65 on average).
Which has better accessibility, core-js or Sumo?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor core-js (88 vs 76). 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 Sumo?
Sumo sites score higher on Lighthouse SEO signals (100 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 Sumo?
core-js sites show lower Time to First Byte (379 ms vs 488 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 Sumo 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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