Open-source Python library for SEO and SEM workflows, including crawling with Scrapy, robots.txt and sitemap parsing, SERP APIs, log file parsing and text analysis.
advertools.readthedocs.io
Browser ExtensionFreemiumFree tier
BuiltWith
Technology lookup service and extension reporting the software, hosting, analytics and advertising stack used by a website, with lead list exports.
What it is
Technology lookup service and extension reporting the software, hosting, analytics and advertising stack used by a website, with lead list exports.
It sits in the browser extension category, and also covers technical seo. It is built by BuiltWith Pty Ltd, based in Australia, and has been around since 2007. A public API is available for pulling data into your own reporting.
The Atlas does not rank tools. No scores, no "top 10", no affiliate links. Categories are descriptive, and two tools in the same category may solve very different problems. Trial the shortlist against your own site before deciding.
Alternatives & neighbours
9 tools sharing at least one category with BuiltWith.
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Enterprise SEO platform combining crawling, log analysis, keyword data and an activation layer that renders and submits pages to search engines. Has extended reporting to AI search surfaces.
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Chinese webmaster tool suite from Chinaz covering SEO overview queries, Baidu weight estimation, app and site ranking lookups, WHOIS, ICP filing checks, reciprocal-link verification and a data API.
chinaz.com