Alternatives to Netcraft Site Report

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

  • BuiltWith

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

    FreemiumProprietaryWeb

    BuiltWith identifies CMS, analytics, CDN and hosting with free single lookups, but detailed reports and bulk data require paid plans and no risk rating is shown.

  • W3Techs Site Info

    A free web lookup that shows the CMS, programming language, web server and host a site uses.

    FreeProprietaryWebBrowser extension

    W3Techs Site Info shows CMS, language, web server and host, and adds browser extensions and an API, though the website carries advertising.

  • WhatCMS

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

    FreeProprietaryWeb

    WhatCMS detects about 1,540 technologies including framework, hosting and CDN, and offers batch detection and an API, without hosting history.

  • 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 software, intended for authorized testing, with heavier use on paid plans.

  • 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, security and performance for one public URL in a free scan, without Netcraft's hosting history.

  • Web Check

    Open-source, self-hostable tool that analyses a website's DNS, security, headers and other public details.

    FreeOpen sourceWebSelf-hosted

    Web Check is open source and self-hostable with Docker, combining DNS, header and security checks into one report of public details.

Also worth comparing

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

  • WhatWeb

    Command-line web scanner that fingerprints the technologies running on a website.

    FreeOpen sourceWindowsmacOSLinuxCommand line

    Netcraft Site Report is a free web lookup showing hosting, server software, history and certificates, under a fair use policy instead of a local open-source tool.

Similar software

Related functionality, not a direct replacement.