Which website technology checker is the most accurate?

For AI builders and modern JavaScript frameworks, [AIWebsiteDetector.com](/) is most accurate. For historical data and legacy technology coverage, BuiltWith has the most comprehensive database.

Is there a free website technology checker with no limits?

Yes. [AIWebsiteDetector.com](/) offers unlimited free single-site scans with no account required. It detects 80+ builders, all major frameworks, hosting providers, and analytics tools — plus an AI probability verdict.

Can any of these tools detect vibe-coded sites?

Only [AIWebsiteDetector.com](/) returns an AI probability score for vibe-coded sites (built with AI coding tools like Claude, Cursor, or Lovable but deployed without a platform wrapper). Other tools return no result for these sites.

Do technology checkers work on password-protected sites?

No — all tools require the page to be publicly accessible. Sites behind authentication, VPNs, or paywalls cannot be analyzed without loading the page.

How often is the detection database updated?

[AIWebsiteDetector.com](/) updates fingerprints continuously as new builders launch. Wappalyzer crowdsources updates. BuiltWith re-crawls sites on a rolling schedule. W3Techs publishes monthly market statistics.

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Best Website Technology Checker Tools in 2026 (Free & Paid)

2026-04-02

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