VendorStacks vs Wappalyzer
Fingerprinting can only see what reaches the browser. A payment processor, a data-hosting provider or a support platform used entirely server-side leaves no front-end trace — but it does appear on a subprocessor list, which is what we read.
Side by side
| VendorStacks | Wappalyzer | |
|---|---|---|
| What it is | A vendor-stack and subprocessor-disclosure API: give it a domain and it returns the vendors that company publicly discloses; give it a vendor and it returns the companies that disclose it. | Technology lookup and technographic lead lists built on public web fingerprinting. |
| Data source | Parses what companies publish about themselves — subprocessor lists, DPAs and vendor disclosures — and returns the quoted source row behind every match. | Fingerprints the public front end: HTML markup, script and file signatures, cookie names such as PHPSESSID, and HTTP response headers such as Server.source |
| Pricing | 1 credit per lookup, flat. Packs at $10 / $50 / $250. 25 free credits on signup, 5 free live scans a day, no annual contract and no sales call. | Published and self-serve; plans cancel anytime, annual billing saves 17%.
|
| API access | Public REST API, self-serve key at signup, plus bulk endpoints and completion webhooks. | Technology Lookup, Lead Lists, Subdomain Finder and Email Verification APIs; credits come with the paid plans.source |
When Wappalyzer is the better choice
Front-end detection at breadth, and instant answers for anything that renders in the browser — analytics tags, JS frameworks, CMS, ad pixels. For that question fingerprinting is simply the right tool.
When VendorStacks is
When the vendor you care about is behind the product rather than in front of it, and when you need the evidence rather than a confidence score. Every match we return carries the sentence the company published, so it can be checked rather than trusted. And when you want to try it without a call: 25 free credits at signup, $10 for 1,100 lookups after that.
What Wappalyzer claims about coverage
- Publishes a live catalogue of web technologies across 106 categories.source
Reported as Wappalyzer's own published claim. We have not independently audited it.
curl "https://api.vendorstacks.com/v1/check?url=stripe.com" \ -H "Authorization: Bearer vr_live_…"
Facts about Wappalyzer are quoted from their own public pages, linked above, and were last checked on 2026-08-09. Nothing here is estimated: where Wappalyzer does not publish something, this page says so. If a detail is out of date, tell us and we will correct it.