What is Wappalyzer?
Wappalyzer is a technology profiler: a browser extension, web app and API that identify the software behind a website, such as its CMS, JavaScript frameworks, analytics, advertising tags, CDN and ecommerce platform, by matching page scripts, headers, cookies and markup against a library of signatures. Its ruleset is closed and its API is paid.
What any website scanner sees is bounded by what a public page serves. Frontend frameworks, tag managers, chat widgets, payment buttons and hosting providers all inject detectable code, so they show up. The systems that run a business do not: the ERP, the data warehouse, the CRM used by the sales team, the observability stack, the internal languages and databases, and the applicant tracking system unless the careers page embeds it, never touch a visitor's browser. A Wappalyzer result for a company is therefore a profile of its marketing site, not of its operations, and for a bank or a manufacturer that is a thin slice.
Job postings fill that gap because a company that hires for a tool names it. A posting for a SAP functional consultant, a Snowflake data engineer or a Salesforce administrator records the internal stack in plain text, with the team, seniority and location attached. JobsPipe parses technologies out of the text of every active posting on the collected boards, so a search with skills_or returns the companies hiring for a technology, and the technology_slugs field on each posting lists what it names. The most-named technologies across the corpus are a programming language, the cloud platforms, an ERP, a CRM and developer tooling, each in a small minority of postings.
For a single company the two views combine: POST /v1/stack/scan returns what the domain serves, in the same spirit as a Wappalyzer lookup, and POST /v1/jobs/search with company_name_or returns what its teams are hiring to run. The scan runs free at jobspipe.dev/stack without an account, and the sandbox search endpoint needs no key either.
- python4.7%
- aws3.1%
- sap2.9%
- azure2.8%
- salesforce1.9%
- power-bi1.8%
- java1.7%
- gcp1.7%
- kubernetes1.5%
- react1.3%
- docker1.3%
- jira1.2%
The full treatment is on Tech stacks and technographics.
Related questions
Is Wappalyzer free?
The browser extension still installs at no cost, but the web app, bulk lookups and API are on paid plans, and the detection ruleset that used to be open source is now closed. If the free tier is the constraint, JobsPipe's domain scan at jobspipe.dev/stack runs without an account, and the same detection is available through an API with a free tier.
What are the alternatives to Wappalyzer?
BuiltWith for bulk site lists and historical adoption data, WhatRuns as a free browser extension, W3Techs for market-share surveys, and JobsPipe for a free scan with an API attached plus job-posting technographics for the internal stack. Which fits depends on whether you need a per-site lookup, a list of sites by technology or the tools behind the login.
How accurate is Wappalyzer?
Accurate for what a page serves, because the evidence is in the scripts, headers and cookies it matches. Versions and hosting details can be wrong when a site proxies or bundles its assets. It cannot be accurate about tools that never appear on a public page, so treat a scan as a profile of the website and use postings for the rest.
Can Wappalyzer detect a company's CRM, ERP or ATS?
Usually not, because those systems run behind a login and leave no trace on the marketing site. A careers page that embeds an ATS widget is the exception. Job postings name these systems directly, and JobsPipe's technology_slugs field on each posting lists the tools the text mentions, which is how the internal stack becomes searchable.
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