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core-js vs Heroku

Based on 1637 and 11 real audits

View core-js details | View Heroku details
Metriccore-jsHerokuWinner
Performance3644Heroku
Accessibility8888Tie
Best Practices8488Heroku
SEO9194Heroku
Security6570Heroku
TTFB385ms201msHeroku
Composite7377Heroku
Performance
core-js
36
Heroku
44
Accessibility
core-js
88
Heroku
88
Security
core-js
65
Heroku
70
SEO
core-js
91
Heroku
94
Composite
core-js
73
Heroku
77

Heroku outperforms core-js in 6 of 7 categories, with a stronger composite score (77 vs 73). core-js leads in no categories.

When to choose core-js

core-js doesn't clearly lead Heroku in any category on the sampled sites — pick it based on developer experience, ecosystem, or existing team skills rather than the audit scores.

When to choose Heroku

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

How this comparison was built

Scores are medians across 1637 audited core-js sites and 11 audited Heroku 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 Heroku?
Based on real BeaverCheck audits, Heroku sites score higher on Lighthouse performance (44 vs 36 on average).
Which has better security, core-js or Heroku?
Heroku sites score higher on security analysis (70 vs 65 on average).
Which has better accessibility, core-js or Heroku?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor core-js (88 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 Heroku?
Heroku sites score higher on Lighthouse SEO signals (94 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 Heroku?
Heroku sites show lower Time to First Byte (201 ms vs 385 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 Heroku for my website?
Both platforms have trade-offs. Heroku 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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