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letsencrypt.org

https://letsencrypt.org

B84
Performance 73Accessibility 96SEO 100Best Practices 92

14 technologies detected · Last audited Apr 4, 2026

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Technology stack

Analytics

PayPal

Cdn

Netlify Netlify CDN

Frontend

Cloudflare D3 Donorbox Font Awesome Google Workspace HSTS Hugo Open Graph Plotly RSS Tailwind CSS

Frequently asked questions about letsencrypt.org

What technology does letsencrypt.org use?

letsencrypt.org is built with Cloudflare, D3, Donorbox, Font Awesome, and Google Workspace.

Is letsencrypt.org fast?

Mostly — letsencrypt.org scores 73/100 on Lighthouse mobile performance, above average but with room to improve.

Is letsencrypt.org accessible?

Yes — letsencrypt.org scores 96/100 on Lighthouse accessibility, meeting most WCAG-aligned automated checks.

What CMS does letsencrypt.org use?

No CMS fingerprint was detected on letsencrypt.org — it may use a static site generator or a custom application.

Where is letsencrypt.org hosted?

letsencrypt.org is served through Netlify.

Does letsencrypt.org use HTTPS?

Yes — letsencrypt.org serves traffic over HTTPS.

1 audits

Apr 4, 2026 18:24 UTC Latest

/

Worker: worker-newyork-us-01

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Scores

Performance 73Accessibility 96Best Practices 92SEO 100PWA 0

Timing

LCP: 3.74 sFirst Contentful Paint: 1.08 sTTFB: 44 msTotal Time: 51 msCumulative Layout Shift: 0.000

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