Alternatives to W3Techs Site Info

A free web lookup that shows the CMS, programming language, web server and host a site uses. The listings below can replace it for an important use case. Each note says what changes if you switch.

Replacements

Listings that take over the same core job as W3Techs Site Info.

  • BuiltWith

    A web tool that detects the technologies a website is built with.

    FreemiumProprietaryWeb

    BuiltWith identifies CMS, analytics, CDN and hosting with free single-site lookups, but detailed reports and bulk data require paid plans.

  • WhatCMS

    A web tool that detects which CMS and other technologies power a given website.

    FreeProprietaryWeb

    WhatCMS detects about 1,540 technologies and offers batch detection and an API, though it has no browser extension for the current page.

  • Netcraft Site Report

    A free web lookup that shows the hosting, server software and technologies behind any website.

    FreeProprietaryWeb

    Netcraft Site Report adds hosting history, certificate details and a risk rating to technology detection, under a fair use policy and without extensions.

  • HackerTarget WhatWeb Scan

    An online scan that runs WhatWeb and Wappalyzer to fingerprint the technologies behind a website.

    FreemiumProprietaryWeb

    HackerTarget WhatWeb Scan runs WhatWeb and Wappalyzer online to fingerprint a site, with heavier use behind paid plans and use limited to authorized testing.

  • Cloudflare Radar URL Scanner

    Free Cloudflare web tool that scans a URL and reports its technologies, security and performance details.

    FreeProprietaryWeb

    Cloudflare Radar URL Scanner reports technologies alongside security and performance details for one public URL, without a browser extension.

Also worth comparing

These listings name W3Techs Site Info as their own alternative, so the relationship runs both ways.

  • Wappalyzer

    Identifies the technologies a website is built with.

    FreemiumProprietaryBrowser extension

    W3Techs Site Info is free and identifies the CMS, language, web server and hosting provider, with a bookmarklet, Firefox and Chrome extensions and an API, though its website carries advertising.

  • WhatRuns

    A free browser extension that shows the technologies a website is built with.

    FreeProprietaryBrowser extension

    W3Techs Site Info identifies CMS, language, web server and hosting provider, offers Firefox and Chrome extensions plus an API, and its website carries advertising.

  • WordPress Theme Detector

    A free online tool that identifies the WordPress theme and plugins a website is using.

    FreeProprietaryWeb

    W3Techs Site Info identifies CMS, language, web server and hosting for any site, with browser extensions, but focuses on the stack rather than WordPress plugins.

Similar software

Related functionality, not a direct replacement.