🛒 Shopify App Merchant Finder — Reverse Lookup Stores by Installed App

Input an app name (Klaviyo, Recharge, Gorgias, Yotpo…), get the list of Shopify stores using it — plus owner email, phone, and socials for direct B2B outreach. This is the reverse of BuiltWith and StoreLeads: instead of paying $295–$449/month for a static database, run an on-demand discovery scan for pennies and pipe the results straight into your CRM.

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💼 Use Cases

• B2B SaaS competitive displacement — Sell a Klaviyo alternative? Pull the list of every Shopify store running Klaviyo and send a switch-pitch sequence.
• Agency lead generation — Shopify Plus agencies need merchants on the apps they implement. Reverse-lookup stores by Recharge, Tapcart, or Shogun and book demos with founders.
• Partnership prospecting — Your app integrates with Yotpo or Loox? Build a co-marketing list of overlapping merchants in one run.
• Market sizing & TAM modeling — Need a defensible "X merchants use Postscript today" number for an investor deck? Sample the long tail of public stores and extrapolate.
• M&A & competitive intelligence — Acquirers diligencing a Shopify app vendor can independently verify install base claims rather than trusting the seller's number.
• Affiliate / referral monetization — Spot stores running an app you have an affiliate deal with and offer them a switch-and-save incentive.
• Churn prediction — Detect when a store removes your competitor's app between runs.

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⚙️ How It Works

1. Seed pool — We scan a curated pool of known Shopify stores (themes showcase + DTC long tail). An optional discoveryQuery keyword (e.g. "skincare") prioritizes relevant niches.
2. Signature library — Each supported app has 3–5 stable signatures embedded in the storefront HTML: dedicated CDN hostnames, global JS objects (window.Klaviyo, _learnq, Recharge), CSS class prefixes, and HTML comment markers. The library survives theme customization and minification.
3. Storefront crawl — We fetch each candidate storefront over HTTPS with rotating residential proxies, confirm it's actually Shopify (cdn.shopify.com fingerprints), then run all 30 signature checks against the HTML.
4. Contact enrichment — When enrichContact: true, the actor follows /contact, /contact-us, /about, and /policies/privacy-policy to extract owner mailto:, tel:, and Instagram/Facebook/TikTok handles.
5. Confidence scoring — Each match has a 0–1 install confidence score based on how many distinct signatures fired (1 = multiple strong fingerprints, 0.5 = single fingerprint).

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📦 Supported Apps (30)

App	Category	App Store Link
Klaviyo	Email marketing	Listing
Klaviyo SMS	SMS marketing	Listing
Recharge	Subscriptions	Listing
Gorgias	Helpdesk	Listing
Postscript	SMS marketing	Listing
Privy	Pop-ups & email	Listing
Yotpo	Reviews & loyalty	Listing
Smile.io	Loyalty rewards	Listing
Stamped	Reviews & loyalty	Listing
Bold Commerce	Subscriptions / upsell	Listing
ReConvert	Post-purchase upsell	Listing
Loox	Photo reviews	Listing
Judge.me	Product reviews	Listing
Vitals	All-in-one suite	Listing
Tapcart	Mobile app builder	Listing
Rebuy	Personalization	Listing
Searchanise	Search & filter	Listing
Tidio	Live chat	Listing
Octane AI	Quiz builder	Listing
Attentive	SMS marketing	Listing
Zonos	Cross-border / duty	Listing
Shogun	Page builder	Listing
Recart	SMS marketing	Listing
LimeSpot	Personalizer	Listing
Justuno	Pop-ups	Listing
AfterShip	Order tracking	Listing
Sky Pilot	Digital downloads	Listing
Bundle Builder	Bundles	Listing
Frequently Bought Together	Cross-sell	Listing
Honest Reviews	Product reviews	Listing

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📤 Output Schema

Field	Type	Example
storeUrl	string	https://www.allbirds.com
storeName	string	Allbirds — Wool, Tree, and Plant-Based Shoes
storeCountry	string	US
appQueried	string	Klaviyo
appsDetected	string[]	["Klaviyo", "Gorgias", "Yotpo"]
appInstallConfidence	number	0.9
ownerEmail	string | null	support@allbirds.com
phone	string | null	+1 415 800 7400
instagram	string | null	https://instagram.com/allbirds
facebook	string | null	https://facebook.com/weareallbirds
tiktok	string | null	https://tiktok.com/@allbirds
priceRange	string	$$
storefrontTraffic	number | null	null
detectedThemes	string[]	["Dawn"]
crawledAt	ISO 8601	2026-05-16T14:00:12Z

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🚀 Examples

Example 1 — find Klaviyo merchants in skincare

Input:

{
  "appName": "Klaviyo",
  "discoveryQuery": "skincare",
  "maxStores": 25,
  "enrichContact": true,
  "country": "US"
}

Output (one item):

{
  "storeUrl": "https://www.glossier.com",
  "storeName": "Glossier",
  "storeCountry": "US",
  "appQueried": "Klaviyo",
  "appsDetected": ["Klaviyo", "Attentive", "Gorgias"],
  "appInstallConfidence": 0.9,
  "ownerEmail": "support@glossier.com",
  "phone": "+1 877 945 6747",
  "instagram": "https://instagram.com/glossier",
  "priceRange": "$$",
  "detectedThemes": ["Dawn"],
  "crawledAt": "2026-05-16T14:00:12Z"
}

Example 2 — find every Recharge subscription store (broad sweep)

Input:

{ "appName": "Recharge", "maxStores": 100 }

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🐍 Python SDK Example

from apify_client import ApifyClient

client = ApifyClient("YOUR_APIFY_TOKEN")
run = client.actor("nexgendata/shopify-app-merchant-finder").call(run_input={
    "appName": "Gorgias",
    "discoveryQuery": "apparel",
    "maxStores": 50,
    "enrichContact": True,
})
for item in client.dataset(run["defaultDatasetId"]).iterate_items():
    print(item["storeUrl"], "|", item.get("ownerEmail"))

🔧 cURL Example

curl -X POST "https://api.apify.com/v2/acts/nexgendata~shopify-app-merchant-finder/runs?token=YOUR_APIFY_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{ "appName": "Postscript", "maxStores": 30, "enrichContact": true }'

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❓ FAQ

How accurate are the signatures? Each app has 3–5 fingerprints (CDN hostnames, JS globals, CSS classes). False-positive rate in internal validation is under 3%. Confidence score lets you filter strict (≥0.7) vs broad (≥0.5).

How fresh is the store data? Every run is live. Unlike BuiltWith's quarterly crawl, you see what the storefront looks like right now — including stores that installed the app in the last 24 hours.

Can I request a custom app be added? Yes — contact us via the Apify support tab on this listing. Adding a new app takes ~30 minutes once we have 2–3 example stores running it.

Can I bulk-query multiple apps in one run? v1 supports one app per run for clean pricing. To query multiple apps, schedule one run per app — they parallelize cleanly. v2 will support bulk mode.

Do you respect robots.txt? We only request public storefront HTML (no /admin, no checkout). We honor rate limits with a 200ms delay per store and back off on 429. We do not scrape gated content or violate any merchant's published robots.txt.

What about Shopify's Terms of Service? This actor reads only publicly served HTML — the same data any browser visiting the store sees. It does not use Shopify's Partner API, the Storefront API, or any authenticated endpoint, and never touches merchant admin surfaces.

Why isn't a store I expected to match showing up? Three reasons: (1) the store's seed pool entry hasn't been added yet — submit it via support, (2) the app is loaded after a user interaction (rare), or (3) the storefront has Cloudflare bot protection blocking server-side fetches. The actor handles each gracefully and logs why.

Can I use this for cold email? Yes — that's the primary use case. The ownerEmail field is extracted from publicly published contact pages, which under CAN-SPAM and equivalent regulations are valid B2B contact addresses. Always honor opt-outs.

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⚖️ How We Compare

	Shopify App Merchant Finder	BuiltWith	Wappalyzer	StoreLeads	MyIP.ms
Price	Pay-per-result (~$0.10/store)	$295–$995/mo	Free ext, paid API	$165–$449/mo	Free, limited
Coverage	Live storefront crawl	Indexed DB	Live in browser	Indexed DB	Reverse-IP
Update frequency	Real-time	Quarterly	Real-time	Weekly	Daily
App library size	30 (growing)	95k+ tech	3k+ tech	Shopify-specific	None
Shopify-specific	✅	⚠️ generic	⚠️ generic	✅	❌
Owner contact enrichment	✅ built-in	⚠️ separate $$$	❌	⚠️ enterprise tier	❌
API access	✅ Apify REST	✅ enterprise	✅ paid	✅ paid	⚠️ HTML scrape
No-contract	✅ pay-as-you-go	❌ annual	❌ monthly min	❌ monthly min	✅

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💰 Pricing

• $0.02 per run start — discovery initialization + signature library load.
• $0.10 per store discovered — only charged for verified, qualified app installs (not failed candidates).
• $0.15 per contact-enriched store — additional charge when owner email or phone is successfully extracted.

A typical 50-store run with enrichment costs about $5–$10 — versus $295/mo minimum at BuiltWith or $165/mo at StoreLeads. For ad-hoc campaigns, agencies, and one-off TAM exercises, the math is overwhelming.

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🔗 Sister Actors

Actor	What it does
nexgendata/shopify-analyzer	Revenue, traffic, and SEO intel for individual Shopify stores
nexgendata/shopify-store-analyzer	Full product catalog extractor — bulk SKU/price/inventory
nexgendata/shopify-app-store-scraper	Scrape app listings, reviews, and pricing from apps.shopify.com
nexgendata/company-tech-stack-detector	General website tech stack detection (any website, any vertical)
nexgendata/b2b-leads-finder	DuckDuckGo + LinkedIn-driven B2B lead generation by keyword
nexgendata/website-email-extractor	Bulk email/phone/social extraction from any list of URLs

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