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ButterCMS vs core-js

Based on 1 and 1600 real audits

View ButterCMS details | View core-js details
MetricButterCMScore-jsWinner
Performance3035core-js
Accessibility8687core-js
Best Practices8883ButterCMS
SEO9291ButterCMS
Security5965core-js
TTFB367ms378msButterCMS
Composite7172core-js
Performance
ButterCMS
30
core-js
35
Accessibility
ButterCMS
86
core-js
87
Security
ButterCMS
59
core-js
65
SEO
ButterCMS
92
core-js
91
Composite
ButterCMS
71
core-js
72

core-js outperforms ButterCMS in 4 of 7 categories, with a stronger composite score (72 vs 71). ButterCMS leads in best practices, SEO, TTFB.

When to choose ButterCMS

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

When to choose core-js

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

How this comparison was built

Scores are medians across 1 audited ButterCMS sites and 1600 audited core-js 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, ButterCMS or core-js?
Based on real BeaverCheck audits, core-js sites score higher on Lighthouse performance (35 vs 30 on average).
Which has better security, ButterCMS or core-js?
core-js sites score higher on security analysis (65 vs 59 on average).
Which has better accessibility, ButterCMS or core-js?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor core-js (87 vs 86). 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, ButterCMS or core-js?
ButterCMS sites score higher on Lighthouse SEO signals (92 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), ButterCMS or core-js?
ButterCMS sites show lower Time to First Byte (367 ms vs 378 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 ButterCMS or core-js for my website?
Both platforms have trade-offs. core-js scores higher on overall composite score while ButterCMS 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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