BuiltWith Alternative — Tech Stack Leads & Domain Lookup

Use this BuiltWith alternative for tech stack lookup, Shopify and Klaviyo leads, lookalike companies and technology monitoring across 60 million websites. Find companies using HubSpot, Stripe, WordPress, PayPal or Mailchimp, or paste domains to retrieve their known stack, contacts and firmographics.

1 site = 1 result. A fast, no-subscription BuiltWith alternative and Wappalyzer alternative for technographics, lead generation and CRM enrichment.

Unlike a plain website database, the Actor can also explain the sales opportunity: which capability is missing, how strong the lead is, what changed and what to pitch.

Example opportunity result (synthetic):

{
  "Root Domain": "example-store.com",
  "Matched Technologies": "Shopify",
  "Missing Technologies": "Klaviyo",
  "Opportunity Score": 84,
  "Signal Strength": "high",
  "Suggested Pitch": "Offer Klaviyo setup, lifecycle flows or email revenue optimization."
}

Start with 10 Shopify-without-Klaviyo leads →

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AI agent quick start

Actor tool ID: apivault_labs/tech-stack-lookup

Agent security: the Actor requires LIMITED_PERMISSIONS. It can use its own run storages and persistent monitor state but does not request access to unrelated datasets, tasks or account resources.

For reliable autonomous calls, always send mode, maxItems and a short columns list. Keep dedupeByDomain: true. Treat an empty dataset as a valid result: the filter may have no matches, a domain may be unknown, a monitor may have no changes, or the selected workflow may intentionally use Key-Value Store.

Choose the workflow deterministically:

User intent	Input contract	Primary output
Find companies using a technology	mode=find + technologies	One lead per website
Find a sales-ready stack gap	mode=find + opportunityPreset	Leads with score and pitch
Enrich known domains	mode=detect + domains	Known profiles; unknown domains omitted
Verify current homepage signals	mode=detect + domains + verifyLive=true	Stored profile plus live evidence; max 100
Find similar companies	mode=lookalike + seed domains	Similar leads; seeds excluded
Track technology changes	mode=monitor + domains + stable monitorName	Changed domains only; first run is baseline
Discover technology names	mode=catalog	TECHNOLOGY_CATALOG, no dataset rows
Estimate segment size	mode=find + target + countOnly=true	COUNT_SUMMARY, no dataset rows

Minimal agent-safe lead request:

{
  "mode": "find",
  "technologies": ["Shopify", "Klaviyo"],
  "matchMode": "all",
  "hasEmail": true,
  "dedupeByDomain": true,
  "maxItems": 25,
  "columns": [
    "Root Domain", "Company", "Emails", "Matched Technologies",
    "Contactability Score", "Lead Tier", "Why This Lead"
  ]
}

Agent rules:

• Do not invent technology names; use mode=catalog when uncertain.
• Do not call a stack gap a migration. Only monitor output with Buying Signal=technology_migration confirms a change between snapshots.
• Reuse the exact same monitorName to continue a monitor baseline.
• Request small batches first. Increase maxItems only after checking a sample.
• Semicolon-separated technology/contact fields are strings, not JSON arrays.
• Preserve exact output field capitalization, including spaces.

Use through Apify MCP

Expose only this Actor to an MCP-compatible agent:

{
  "mcpServers": {
    "apify": {
      "url": "https://mcp.apify.com?tools=apivault_labs/tech-stack-lookup"
    }
  }
}

OAuth is recommended. Then ask the agent: Run apivault_labs/tech-stack-lookup in find mode and return 25 US Shopify websites using Klaviyo with business emails.

---

Five workflows in one Actor

🔎 Find websites by technology

Start with a technology and reverse-find matching domains. Combine required and excluded tools, then filter by country, industry, contacts, company size or freshness to create a sales-ready prospect list.

🧰 Check the tech stack of my domains

Paste domains or URLs you already have. The Actor looks up each known website and returns its technology profile plus available emails, phones, company data, social profiles and rankings. Unknown domains are skipped and are not charged.

🧬 Find lookalike companies

Paste a few customer or competitor domains. The Actor identifies their strongest shared technology signature, then finds other companies with a similar stack. Seed domains are excluded from the result and each lead includes a similarity score plus the technologies it shares with the seed profile.

🔔 Monitor technology changes

Give a monitor a stable name and rerun it with the same domains. The first run saves a private baseline. Later runs return only domains where a technology was added or removed, so unchanged checks create no per-result charge. Missing domains do not erase their previous baseline.

📚 Browse the technology catalog

Use Browse technology catalog when you are unsure how a product is named or which stack category to search. The catalog is written to TECHNOLOGY_CATALOG in Key-Value Store and creates no dataset rows.

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Find websites using any technology

Give it one or more technologies and the Actor finds matching websites across 60M technology profiles. Instead of checking domains one by one, start with the technology and receive matching companies — ready for lead generation, market research or competitor campaigns.

Combine technologies exactly how your campaign needs:

• Any (OR) — sites using at least one, e.g. Stripe or Braintree
• All (AND) — sites using every one, e.g. Shopify + Klaviyo
• Exclude — drop sites using a tool, e.g. Klaviyo users that do not use Yotpo

Optionally narrow to one stack layer:

Stack layer	Examples
Ecommerce platform	Shopify, WooCommerce, Magento, BigCommerce, PrestaShop
CMS	WordPress, Wix, Squarespace, Joomla, GoDaddy
CRM	HubSpot, Salesforce, Brevo, ActiveCampaign, Zoho
Marketing automation	Klaviyo, Omnisend, Mailchimp, MailerLite, Brevo
Payments	PayPal, Stripe, Shop Pay, Apple Pay, Google Pay
Hosting	Cloudflare, AWS, Google Cloud, Vercel, Hostinger
AI tools	OpenAI, ChatGPT, Google Gemini, chatbots

Leave the layer on Any (default) to match the technology anywhere in the stack — useful because a tool (e.g. HubSpot) can show up as both CRM and marketing automation.

Technology opportunity leads

Choose a Sales opportunity preset to turn a stack gap into an outreach-ready lead list. The preset automatically configures required and missing technologies.

Available campaigns include:

• Shopify stores without Klaviyo
• Klaviyo users without Yotpo
• Mailchimp replacement prospects
• WooCommerce migration prospects
• HubSpot companies without Klaviyo
• Stripe websites without PayPal

Each result can include Missing Technologies, Opportunity Score, Signal Strength and Suggested Pitch. A stack gap is labelled as a prospecting opportunity, not as a confirmed migration.

{
  "mode": "find",
  "opportunityPreset": "shopify_without_klaviyo",
  "hasEmail": true,
  "lastFoundWithinDays": 30,
  "maxItems": 50
}

Buying signals from technology changes

Scheduled monitor runs classify real snapshot differences as:

• technology_adopted
• technology_removed
• stack_changed
• technology_migration — only when a technology was removed and another was added in the same category, such as Mailchimp → Klaviyo

Change rows include migration from/to, opportunity score, signal strength and a suggested pitch. The first run only establishes the baseline; historical migrations from before monitoring began cannot be reconstructed.

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What you get per site

• Domain & company — Root Domain, Primary Domain, Company, Vertical
• Contact data — Emails, Telephones, Owner/People
• Full tech stack — eCommerce Platform, CMS, CRM, Marketing Automation, Payment Platforms, Hosting Provider, AI tools
• Firmographics — Sales Revenue, Employees, Technology Spend, Ticker
• Social profiles — LinkedIn, X/Twitter, Facebook, Instagram, and more
• Rankings — Tranco, Page Rank, Majestic, Overall Score, Performance, SEO
• Geo — City, State, Zip, Country
• Dates — First Detected, Last Found, First Indexed, Last Indexed
• Lead intelligence — matched technologies and categories, fit score, contactability score, lead tier, data age and a plain-language reason
• Lookalike intelligence — similarity score and shared technologies

For domain checks, enable Verify live website to fetch the current public homepage and add HTTP status, final URL, live technology signals, confidence, evidence and technologies found live but missing from the stored profile. Live verification is intentionally capped at 100 domains per run.

Leave Output columns empty to get all source and intelligence fields, or pick only the ones you need. Dedicated dataset views make lead intelligence, live verification and monitor changes easier to scan.

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Filters, sorting & limits

• Countries — one or more ISO-2 codes (US, DE, GB…)
• Industry / vertical — keep only sites in an industry (Fashion, Technology…)
• Only with email / phone — keep only sites with contact data (great for outreach lists)
• Freshness windows — first indexed, re-indexed or last confirmed within N days
• Sort by — Overall Score, Tranco, Sales Revenue, Employees… to get the top accounts first
• Deduplicate by domain — enabled by default; no repeated normalized Root Domain values across data segments
• Max rows — up to 250,000 per run (no total cap — use offset to page through more across runs)
• Count only — preview in COUNT_SUMMARY without per-result charges, with counts per data segment and a raw total. Actor start and platform usage may still apply. Because a domain can occur in several segments, the total is an upper bound for unique websites.

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Example

Input: technologies = ["Klaviyo"], excludeTechnologies = ["Yotpo"], country = ["US"], hasEmail = true

Returns US sites running Klaviyo but not Yotpo, with a contact email — ideal for agencies and SaaS teams selling a Yotpo alternative to Klaviyo users.

[
  {
    "Root Domain": "example-store.com",
    "Company": "Example Store",
    "Country": "US",
    "Emails": "hello@example-store.com",
    "eCommerce Platform": "Shopify",
    "Marketing Automation Platform": "Klaviyo",
    "Payment Platforms": "PayPal;Shop Pay;Apple Pay",
    "_platform": "Shopify"
  }
]

_platform appears only when several data segments are queried. It identifies the segment that supplied the row, not the site's only detected technology. Leave Output columns empty for all 59 source fields.

---

Use cases

• Technology lead lists — build targeted prospect lists from the software companies use
• SaaS sales — find websites using a competitor and pitch a replacement
• Agencies — find Shopify, WordPress, WooCommerce or HubSpot websites that need your services
• Market research — measure technology adoption by country or industry
• Partnerships & integrations — find companies using complementary platforms

Need a broad ecommerce or CMS lead export?

Use our Shopify & Ecommerce Store Finder — Emails, Phones & Tech to browse the full 60M-site catalog by platform, country, company attributes and any of 59 fields. Use this Actor when the technology itself defines your target audience or when you need domain-to-tech lookup.

---

Quick start

Check the technology stack of domains

{
  "mode": "detect",
  "domains": ["shopify.com", "hubspot.com"],
  "maxItems": 50
}

Use this workflow for CRM enrichment, competitor research and bulk website technology checks without a BuiltWith or Wappalyzer subscription.

To confirm current public signals for a small list:

{
  "mode": "detect",
  "domains": ["shopify.com", "hubspot.com"],
  "verifyLive": true,
  "maxItems": 2
}

Find companies similar to your customers

{
  "mode": "lookalike",
  "domains": ["example-customer.com", "another-customer.com"],
  "country": ["US"],
  "hasEmail": true,
  "maxItems": 50
}

Monitor a portfolio for technology changes

{
  "mode": "monitor",
  "monitorName": "agency-clients",
  "domains": ["client-one.com", "client-two.com"]
}

Schedule the same input from Apify Console. The initial run creates the baseline; subsequent runs output only detected additions or removals.

Browse supported examples and aliases

{
  "mode": "catalog"
}

Find websites using Shopify

{
  "technologies": ["Shopify"],
  "country": ["US"],
  "hasEmail": true,
  "maxItems": 50
}

Use this search to create a Shopify website list for ecommerce services, development, migration, payments, retention marketing or app partnerships.

Find Shopify stores using Klaviyo

{
  "technologies": ["Shopify", "Klaviyo"],
  "matchMode": "all",
  "hasEmail": true,
  "sortBy": "Overall Score",
  "sortDesc": true,
  "maxItems": 5000
}

This creates a technology lead list where every result matches both products. It is useful for agencies, integrations and SaaS companies with a clearly defined ideal customer profile.

Find competitor users but exclude your customers

{
  "technologies": ["Klaviyo"],
  "excludeTechnologies": ["Yotpo"],
  "country": ["US", "GB"],
  "hasEmail": true,
  "maxItems": 10000
}

Use exclusions to create replacement campaigns, identify whitespace or remove companies already using a complementary product.

Measure a market before exporting

{
  "technologies": ["HubSpot"],
  "country": ["DE"],
  "vertical": "Technology",
  "countOnly": true
}

Count-only mode helps size an audience before requesting rows. It is a practical first step for market research and campaign budgeting.

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Complete input reference

Field	Type	What it controls
mode	find / detect	Reverse-find websites by technology or check a supplied domain list
domains	string list	Domains or URLs used by the detect workflow
technologies	string list	Products or tools that websites must use
matchMode	any / all	Match at least one technology or every technology
excludeTechnologies	string list	Remove websites using any listed technology
category	select	Search any layer or focus on ecommerce, CMS, CRM, marketing, payments, hosting or AI
country	ISO-2 list	Include selected countries, such as US, GB, DE
vertical	text	Focus on an industry such as Fashion, Health, Food or Technology
hasEmail	boolean	Return only rows with an available email
hasPhone	boolean	Return only rows with an available phone
sortBy	select	Rank results by score, traffic rank, revenue, employees, spend or recency
sortDesc	boolean	Return the highest values first when enabled
dedupeByDomain	boolean	Remove repeated normalized root domains globally; enabled by default
countOnly	boolean	Write a raw-row preview to COUNT_SUMMARY without per-result charges
newWithinDays	integer	Keep records first indexed within N calendar days; 0 disables
lastIndexedWithinDays	integer	Keep records re-indexed within N calendar days; 0 disables
lastFoundWithinDays	integer	Keep records last confirmed within N calendar days; 0 disables
maxItems	integer	Maximum rows to return per run, from 1 to 250,000
offset	integer	Skip matching rows for paginated exports
columns	string list	Select output fields; leave empty for all available fields

Choosing Any or All

Use Any when several technologies describe the same audience. For example, Stripe, Braintree and PayPal with Any finds websites using at least one of those payment tools.

Use All when the combination defines your ideal customer. For example, Shopify, Klaviyo and Gorgias with All finds companies matching the whole stack combination.

Choosing a stack layer

Keep Any layer when you care whether a technology is present anywhere in a company's known stack. Select a specific layer when the product name is broad or when your analysis requires a particular role:

• Ecommerce: Shopify, WooCommerce, Magento, BigCommerce
• CMS: WordPress, Wix, Squarespace, Joomla
• CRM: HubSpot, Salesforce, Zoho, ActiveCampaign
• Marketing: Klaviyo, Mailchimp, Omnisend, Attentive
• Payments: Stripe, PayPal, Braintree, Shop Pay
• Hosting: Cloudflare, AWS, Vercel, Google Cloud
• AI: recognized AI products and website tools

Use complete technology names for precise results. Product naming can differ between vendors, editions and integrations, so review a small sample before a large export.

Sorting the best prospects first

For sales prospecting, set sortBy to Overall Score, Sales Revenue, Employees or Technology Spend and keep sortDesc enabled. For research, traffic-rank or recency fields may be more useful. Sorting is applied globally across the selected data segments before maxItems, so the result is not biased toward whichever segment happens to be scanned first. Numeric metrics are ordered numerically, and Root Domain is used as a stable tie-breaker.

Building a recurring fresh-lead feed

Use newWithinDays to select recently indexed records and lastFoundWithinDays to require recent confirmation. Save the input as an Apify Task, inspect its result, and then attach a weekly Schedule if the source index is being refreshed frequently enough for your audience. Future-dated source anomalies are ignored by freshness filters and date sorting.

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Technology lead-generation playbooks

SaaS competitor-user prospecting

Search for websites using a competing product, require an email, select target countries and sort by company size or score. The resulting B2B lead list can support personalized outreach based on a relevant, observable technology signal.

Example segments:

• Klaviyo users that do not use your review platform
• HubSpot websites that do not use your integration
• Shopify Plus stores in the United States with contact information
• WordPress businesses in a chosen industry and country
• Stripe users with high traffic or estimated revenue

Web-development and migration agencies

Find websites using a platform your agency supports. A WooCommerce agency can build a WooCommerce website list; a Shopify migration consultancy can identify Magento or legacy ecommerce users; a CRM consultancy can target HubSpot or Salesforce accounts by geography and industry.

Partnerships and integrations

Use All to identify companies whose stack makes them a good integration or channel partner. Use Exclude to remove incompatible products, current customers or technologies outside your campaign criteria.

Account-based marketing

Combine technology, country, industry, contact availability and company signals to create a focused ABM segment. Select only the columns your CRM needs, export the results and keep the technology fields for personalization and routing.

Market sizing and technology adoption

Run countOnly to compare technology audiences without per-result charges. The result is written to the COUNT_SUMMARY key-value record rather than the paid dataset; Actor start and platform usage may still apply. Repeat the same query with different countries or industries to study geographic and vertical coverage. Counts are raw segment rows and can include the same domain more than once, so treat the total as an upper bound. Coverage and freshness can vary, so they should not be treated as audited market-share figures.

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More search examples

Websites using Shopify or WooCommerce

{
  "technologies": ["Shopify", "WooCommerce"],
  "matchMode": "any",
  "category": "ecommerce",
  "country": ["US", "CA"],
  "maxItems": 5000
}

HubSpot companies in technology

{
  "technologies": ["HubSpot"],
  "vertical": "Technology",
  "hasEmail": true,
  "columns": [
    "Root Domain",
    "Company",
    "Country",
    "Emails",
    "LinkedIn",
    "CRM Platform",
    "Marketing Automation Platform",
    "Employees"
  ],
  "maxItems": 2500
}

Payment technology prospect list

{
  "technologies": ["Stripe", "Braintree", "PayPal"],
  "matchMode": "any",
  "category": "payments",
  "hasEmail": true,
  "sortBy": "Sales Revenue",
  "sortDesc": true,
  "maxItems": 10000
}

Companies using Shopify and Klaviyo but not Yotpo

{
  "technologies": ["Shopify", "Klaviyo"],
  "matchMode": "all",
  "excludeTechnologies": ["Yotpo"],
  "hasEmail": true,
  "dedupeByDomain": true,
  "maxItems": 10000
}

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Output views

The default dataset includes views for common workflows:

• Overview: domain, company, country and major technology fields
• Tech Stack: ecommerce, CMS, CRM, marketing, payments, hosting and AI
• Contacts: company, email, phone and social profiles
• Location: company, city, state, postal code and country
• Freshness: first seen, indexed and last confirmed dates
• Lead Intelligence: match, fit, contactability, tier and explanation
• Stack Gap Opportunities: missing technology, score, strength and pitch
• Buying Signals: monitored adoption, removal and migration events
• Live Verification: current homepage signals and evidence

You can download the full dataset or open a focused view in Apify Console. When calling the Actor through the API, use the columns input to keep payloads small and map output directly into your application or CRM.

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Export

Every run stores results in a dataset — download as CSV, JSON, XML or Excel, or pull via API: https://api.apify.com/v2/datasets/{datasetId}/items?format=csv

Run through the Apify API

curl -X POST \
  "https://api.apify.com/v2/acts/apivault_labs~tech-stack-lookup/run-sync-get-dataset-items" \
  -H "Authorization: Bearer $APIFY_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "technologies": ["Shopify", "Klaviyo"],
    "matchMode": "all",
    "country": ["US"],
    "hasEmail": true,
    "maxItems": 100
  }'

For larger exports, start an asynchronous Actor run and read its default dataset after completion. You can also save a configured input as an Apify Task, call it from a workflow, or connect the dataset to your preferred integration.

Pagination

Use offset to request later result windows. Set sortBy when stable pagination is required; without it, the Actor favors a fast balanced mix of data segments. Keep the same technologies, filters, sorting direction and selected columns between runs. Duplicate removal is applied before offset pagination. Technology records can change over time, so export related pages within a reasonably short period.

Controlling spend

Start with countOnly, then select a practical maxItems. This Actor is pay per result: website rows are the billable output. Your Apify maximum total charge can stop a run before maxItems; increase it only when you intentionally want a larger export.

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Data quality and limitations

• Use complete product names (for example Shopify Plus, not Plus) for the most precise technology matches.
• Coverage and freshness vary by technology and field. Use Last Found / Last Indexed when recency matters.
• Rare or very short search terms can take longer than common ones.
• Contact, company, revenue, employee and technology fields may be missing for individual websites. Enable contact filters when those fields are required.
• Revenue, spend, rankings and scores are third-party or derived business signals, not audited financial statements or guaranteed performance indicators.
• A technology can be renamed, removed, obscured or deployed only on selected pages. Validate important accounts before making time-sensitive decisions.
• Counts describe available coverage for the selected query; they are not an official census or audited market-share measurement.

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Frequently asked questions

Is this a BuiltWith or Wappalyzer alternative?

Yes. Use Find mode for reverse technographics — technology to matching websites — and Detect mode for domain-to-tech-stack lookup. Results can also include contacts, company data, rankings and geo, with pay-per-result pricing instead of a monthly subscription.

Can I check the technology stack of my own domain list?

Yes. Select Check the tech stack of my domains, paste domains or URLs, and run the Actor. It returns records found in the 60M-site index; unknown domains are skipped and are not charged.

How do I find websites using a specific technology?

Add the technology name, such as Shopify, Klaviyo, HubSpot or Stripe, and run the Actor. It returns matching domains from the 60M-site database. Add country, industry, email and phone filters to turn the results into a targeted lead list.

Can I find companies using several technologies together?

Yes. Choose All to find a specific combination such as Shopify + Klaviyo, or Any to find companies using at least one tool from a list. Use Exclude technologies to remove sites using a competitor or incompatible product.

How is this different from checking websites one by one?

It reverses the usual workflow: start with a technology and export matching websites and company data in bulk. Large technology lead lists are fast and pay per result. Coverage and freshness can vary by field and technology.

Can I create a B2B email list by technology?

Yes. Enable Only with email, then filter by country or industry. Results can include business emails, phone numbers, company details, social profiles, rankings and the full known technology stack.

Can I find websites using Shopify?

Yes. Add Shopify to Technologies. You can narrow the Shopify website list by country, industry, email or phone availability, then sort by score, traffic, employees, revenue or technology spend.

Can I find websites using Klaviyo or HubSpot?

Yes. Search for Klaviyo, HubSpot or both. Choose Any to include either tool, or All to require both. Add another technology such as Shopify to create a more specific prospect segment.

Can I exclude companies using a competing product?

Yes. Add unwanted products to Exclude technologies. A site is removed when it matches any technology in that list.

Does it support bulk exports?

Yes. A run can return up to 250,000 rows, and there is no total cap — use offset with sorting to page through additional result windows across runs. Start with a count and choose the fields you need.

Which export formats are available?

Apify datasets support JSON, CSV, Excel, XML and additional formats. Results are also accessible through the Apify API and integrations.

Why does a result have an empty field?

Field availability differs by website. A domain may have technology information without a known email, phone, company name or revenue signal. Use hasEmail and hasPhone when those contacts are mandatory.

How current are the results?

Freshness varies. Use Last Found, Last Indexed and related date fields when available, and independently verify high-value accounts before outreach or time-sensitive analysis.

Is this an independent technology lead finder?

Yes. This is an independent Apify Actor for reverse technology lookup, market research and technology-based B2B prospecting.

Do I pay for empty searches?

The product uses pay-per-result billing for website rows. Use count-only mode to size a segment before exporting and review the active Pricing tab for current event prices and platform-usage terms.

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Is it legal, and how should I use this data?

This Actor returns publicly available business (B2B) information — it does not access private, paywalled, or login-protected data.

Some fields (an email, phone, or a person's name tied to a small business) can qualify as personal data under laws such as the EU/UK GDPR and the California CCPA/CPRA. When you export and use results, you act as the data controller and are responsible for:

• having a lawful basis (for B2B outreach this is usually legitimate interest);
• honoring data-subject rights (access, correction, deletion, opt-out);
• following marketing rules (GDPR/ePrivacy, CAN-SPAM, CASL) before contacting anyone;
• keeping the data secure and using it only for the stated purpose.

Responsible use

• Intended for B2B lead generation, sales, and market research — prefer business contacts (e.g. info@, contact@).
• Do not use the data for spam, harassment, or any purpose prohibited by law.

This section is general information, not legal advice.