Skip to content

nrel.gov

https://nrel.gov

C75
Performance 44Accessibility 100SEO 92Best Practices 100

19 technologies detected · Last audited Apr 21, 2026

View full audit

Technology stack

Analytics

Google Analytics Google Tag Manager Microsoft Clarity Sitefinity Insight

Cdn

Cloudflare

Cms

Progress Sitefinity

Frontend

Apple Bootstrap Font Awesome Glide.js Google Font API Google Search Console HSTS HTTP/3 Microsoft Microsoft ASP.NET ShareThis Tailwind CSS web-vitals

Frequently asked questions about nrel.gov

What technology does nrel.gov use?

nrel.gov is built with Progress Sitefinity, Apple, Bootstrap, Font Awesome, and Glide.js.

Is nrel.gov fast?

No — nrel.gov scores 44/100 on Lighthouse mobile performance, indicating significant optimization opportunities.

Is nrel.gov accessible?

Yes — nrel.gov scores 100/100 on Lighthouse accessibility, meeting most WCAG-aligned automated checks.

What CMS does nrel.gov use?

nrel.gov runs on Progress Sitefinity.

Where is nrel.gov hosted?

nrel.gov is served through Cloudflare.

Does nrel.gov use HTTPS?

Yes — nrel.gov serves traffic over HTTPS.

1 audits

Apr 21, 2026 23:38 UTC Latest

/

Worker: worker-saopaulo-br-01

View full report →

Scores

Performance 44Accessibility 100Best Practices 100SEO 92PWA 0

Timing

LCP: 6.46 sFirst Contentful Paint: 3.51 sTTFB: 420 msTotal Time: 420 msCumulative Layout Shift: 0.067

Send Feedback