Website Tech Stack Lookup & Reverse Lead Finder

Detect what any website is built with — or reverse the question and get every domain using a technology, complete with contact emails. A fast, no-subscription BuiltWith and Wappalyzer alternative for sales prospecting, lead generation, and competitive research.

Two modes in one Actor

🔎 Find mode (reverse lookup) — the lead-gen superpower

Give it one or more technologies and get back every domain that uses them, filtered by country and traffic. This is the expensive part of BuiltWith and Store Leads — here it is pay-per-domain with no monthly fee.

• "Every Shopify store using Klaviyo in the United States"
• "All sites on HubSpot that also run Webflow"
• "WooCommerce stores with a payment provider, ranked by traffic"

Each result includes contact emails, phone numbers, social profiles, domain rank, and a lead score — a ready-to-import prospecting list.

🧰 Detect mode (forward) — analyze your domains

Paste a list of domains and get the full technology stack for each: CMS, ecommerce platform, analytics, tag managers, payment processors, marketing automation, CDN, hosting, security, and 1000+ more — plus the same contact + lead-signal enrichment.

What you get per domain

Field	Description
domain, domain_rank	Domain and its popularity/traffic rank
primary_ecommerce, primary_cms	Headline platform detections
technologies, technologies_grouped	Flat list + full category breakdown
signals	Booleans: is_shopify, has_ecommerce, has_marketing_automation, has_payment_provider, has_analytics, has_advertising…
lead_score, lead_segments	0–100 score + tags like shopify-store, uses-marketing-automation, high-traffic
contact_emails, contact_phones, social_urls	Public contact data for outreach

How it compares

	This Actor	tugelbay (tech detector)	seibs.co (Shopify discovery)
Forward tech detection	✅	✅	Shopify only
Reverse "find domains by technology"	✅	❌	Shopify only
Contact emails + phones included	✅	❌	✅
Works for any of 1000+ technologies	✅	✅	❌
Lead score + segments	✅	✅	partial
No subscription	✅	✅	✅

Use cases

• SaaS sales teams — build target lists of stores using (or missing) a competitor's tool.
• Agencies — find every WordPress / Shopify / Webflow site in a market for outreach.
• Martech & ecommerce apps — segment prospects by their exact stack and contact them.
• Competitive research — see what technologies a cohort of sites runs.
• Enrichment — append tech stack + emails to an existing domain list.

Pricing

Pay only for what you pull. $0.005 per domain in Find mode, $0.025 per domain in Detect mode, plus a $0.001 start fee. No monthly subscription.

Example input

{
  "mode": "find",
  "technologies": ["Shopify", "Klaviyo"],
  "locationCode": "2840",
  "minDomainRank": 200,
  "maxResults": 250
}

FAQ

Do I need an API key? No. Just set the inputs and run.

Where do the emails come from? Public contact data associated with each domain. Use responsibly and in line with applicable laws.

Can I find stores that use one tool but NOT another? Use Find mode for the required technologies, then filter the output by the signals you want to exclude.

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Tags: tech stack checker, builtwith alternative, wappalyzer alternative, technology lookup, reverse technology lookup, shopify store finder, klaviyo customers, lead generation, sales prospecting, technographics, ecommerce leads.