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Formstack vs Underscore.js

Based on 3 and 167 real audits

View Formstack details | View Underscore.js details
MetricFormstackUnderscore.jsWinner
Performance3138Underscore.js
Accessibility9887Formstack
Best Practices9183Formstack
SEO8890Underscore.js
Security6164Underscore.js
TTFB749ms379msUnderscore.js
Composite7172Underscore.js
Performance
Formstack
31
Underscore.js
38
Accessibility
Formstack
98
Underscore.js
87
Security
Formstack
61
Underscore.js
64
SEO
Formstack
88
Underscore.js
90
Composite
Formstack
71
Underscore.js
72

Underscore.js outperforms Formstack in 5 of 7 categories, with a stronger composite score (72 vs 71). Formstack leads in accessibility, best practices.

When to choose Formstack

Choose Formstack when your primary concern is accessibility and best practices. Its audit data shows consistent strength in these areas across the sampled sites.

When to choose Underscore.js

Choose Underscore.js 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 3 audited Formstack sites and 167 audited Underscore.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, Formstack or Underscore.js?
Based on real BeaverCheck audits, Underscore.js sites score higher on Lighthouse performance (38 vs 31 on average).
Which has better security, Formstack or Underscore.js?
Underscore.js sites score higher on security analysis (64 vs 61 on average).
Which has better accessibility, Formstack or Underscore.js?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor Formstack (98 vs 87). 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, Formstack or Underscore.js?
Underscore.js sites score higher on Lighthouse SEO signals (90 vs 88 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), Formstack or Underscore.js?
Underscore.js sites show lower Time to First Byte (379 ms vs 749 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 Formstack or Underscore.js for my website?
Both platforms have trade-offs. Underscore.js scores higher on overall composite score while Formstack 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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