Website technology scanner

anVendor vs Wappalyzer

Wappalyzer fingerprints public websites. anVendor finds leads that are paying behind the login, and estimates annual spend for each one.

Both products can build a lead list around a named vendor. Wappalyzer qualifies each lead on technology fingerprinted on a public website. anVendor qualifies it on current subscription evidence, whether or not the service appears on the customer's site, then estimates what each one spends.

What Wappalyzer does well

Wappalyzer's fingerprint library is broad and precise, and its browser extension is the fastest way in existence to answer "what is this site running" while you are looking at it. For a rep qualifying a prospect mid-call, or a marketer checking what a competitor's landing page loads, nothing else is that immediate. Its technology-filtered lead lists and its API are well suited to front-end categories.

Where it goes quiet

Everything that never renders in a browser tab. A company can run a company-wide seat licence for a design tool, a document suite, an HR system or a code host without one byte of it reaching the public site — so a scanner reports nothing, which reads identically to "they don't use it". And like any tag-based signal, a hit says a script is present, not that a subscription is live or how many people are on it.

Side by side

	Wappalyzer	anVendor
What it observes	Technology fingerprints on a company's public website	Evidence that a company holds an account with a vendor
SaaS behind a login	No — what the browser loads only	Yes — CRM, HR, design, documents, ticketing, code hosting, storage
Depth inside a company	Present or absent	Adoption as a percentage, so a pilot reads differently from a rollout
Spend figure	None published	Estimated annual spend from the vendor's published plan ladder, shown as a floor
Runs tool → companies	Yes — lead lists filtered by technology	Yes — enter a competitor, get the companies paying for it
Best at	Instant front-end tech identification, in-browser and via API	Lead generation and qualification: leads that already use a competitor, with deal sizes attached

Which to use when

Use Wappalyzer for immediate, in-browser identification of a site's stack, and for prospecting in categories that live on the front end.
Use anVendor for the subscriptions behind the login, for how far a tool has spread inside a company, and for an estimated annual spend figure on each result.

This is not either/or, and the honest answer for most teams is both. They read different evidence, so they disagree in useful ways: a company one of them is silent about is a company the other may well have. What matters is knowing which lens you are looking through when you write the email.

One thing to be clear about: anVendor is not a website technology scanner and does not replace one. If the question is which analytics tag, ad pixel, CDN or front-end framework a site loads, a site scanner is the right instrument and anVendor is the wrong one.

Frequently asked questions

Is anVendor a Wappalyzer alternative?

For generating and qualifying leads that pay for a given product, yes. For identifying what a website is built with, no — that is what Wappalyzer is for, and anVendor does not do it.

Is there a browser extension?

No, deliberately. anVendor uses no browser extension, SDK or tracking script, and none of its data comes from watching what anyone does online. Results are delivered in the app.

Is there an API?

Not yet. Results come with a full search history on your account and CSV, Excel and PDF export.

Leads already using your competitor — and what they pay

Enter the tool you sell against and get the companies paying for it, each one qualified by current use. Discovering companies is free on every plan; you pay only for a confirmed match.

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