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core-js vs Instana

Based on 1599 and 2 real audits

View core-js details | View Instana details
Metriccore-jsInstanaWinner
Performance3647Instana
Accessibility88100Instana
Best Practices8486Instana
SEO9196Instana
Security6563core-js
TTFB379ms85msInstana
Composite7274Instana
Performance
core-js
36
Instana
47
Accessibility
core-js
88
Instana
100
Security
core-js
65
Instana
63
SEO
core-js
91
Instana
96
Composite
core-js
72
Instana
74

Instana outperforms core-js in 6 of 7 categories, with a stronger composite score (74 vs 72). core-js leads in security.

When to choose core-js

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

When to choose Instana

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

How this comparison was built

Scores are medians across 1599 audited core-js sites and 2 audited Instana 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 Instana?
Based on real BeaverCheck audits, Instana sites score higher on Lighthouse performance (47 vs 36 on average).
Which has better security, core-js or Instana?
core-js sites score higher on security analysis (65 vs 63 on average).
Which has better accessibility, core-js or Instana?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor Instana (100 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 Instana?
Instana sites score higher on Lighthouse SEO signals (96 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 Instana?
Instana sites show lower Time to First Byte (85 ms vs 379 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 Instana for my website?
Both platforms have trade-offs. Instana 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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