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core-js vs Smartlook

Based on 1841 and 3 real audits

View core-js details | View Smartlook details
Metriccore-jsSmartlookWinner
Performance3722core-js
Accessibility8879core-js
Best Practices8589Smartlook
SEO91100Smartlook
Security6771Smartlook
TTFB438ms1164mscore-js
Composite7474Tie
Performance
core-js
37
Smartlook
22
Accessibility
core-js
88
Smartlook
79
Security
core-js
67
Smartlook
71
SEO
core-js
91
Smartlook
100
Composite
core-js
74
Smartlook
74

core-js and Smartlook are closely matched, each leading in different categories. core-js has a composite score of 74 while Smartlook scores 74.

When to choose core-js

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

When to choose Smartlook

Choose Smartlook when your primary concern is SEO 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 1841 audited core-js sites and 3 audited Smartlook 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 Smartlook?
Based on real BeaverCheck audits, core-js sites score higher on Lighthouse performance (37 vs 22 on average).
Which has better security, core-js or Smartlook?
Smartlook sites score higher on security analysis (71 vs 67 on average).
Which has better accessibility, core-js or Smartlook?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor core-js (88 vs 79). 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 Smartlook?
Smartlook 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 Smartlook?
core-js sites show lower Time to First Byte (438 ms vs 1164 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 Smartlook 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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