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JS.org vs Umami

Based on 1 and 14 real audits

View JS.org details | View Umami details
MetricJS.orgUmamiWinner
Performance9059JS.org
Accessibility10089JS.org
Best Practices9693JS.org
SEO10092JS.org
Security5966Umami
TTFB315ms314msUmami
Composite7876JS.org
Performance
JS.org
90
Umami
59
Accessibility
JS.org
100
Umami
89
Security
JS.org
59
Umami
66
SEO
JS.org
100
Umami
92
Composite
JS.org
78
Umami
76

JS.org outperforms Umami in 5 of 7 categories, with a stronger composite score (78 vs 76). Umami leads in security, TTFB.

When to choose JS.org

Choose JS.org when your primary concern is performance and accessibility. Its audit data shows consistent strength in these areas across the sampled sites.

When to choose Umami

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

How this comparison was built

Scores are medians across 1 audited JS.org sites and 14 audited Umami 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, JS.org or Umami?
Based on real BeaverCheck audits, JS.org sites score higher on Lighthouse performance (90 vs 59 on average).
Which has better security, JS.org or Umami?
Umami sites score higher on security analysis (66 vs 59 on average).
Which has better accessibility, JS.org or Umami?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor JS.org (100 vs 89). 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, JS.org or Umami?
JS.org sites score higher on Lighthouse SEO signals (100 vs 92 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), JS.org or Umami?
Umami sites show lower Time to First Byte (314 ms vs 315 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 JS.org or Umami for my website?
Both platforms have trade-offs. JS.org scores higher on overall composite score while JS.org 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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