How do I find out what technology a website is built with?

Enter the domain in the StackPulse lookup. It fetches the public pages, matches HTML, scripts and response headers against a signature library of ecommerce platforms, payment gateways, marketing pixels and infrastructure, and for storefronts renders the page in a headless browser to catch client-side tags.

Can StackPulse tell which payment gateway a website uses?

Yes. StackPulse detects Stripe, PayPal, Braintree, Adyen, Klarna, Afterpay, Square, Shop Pay, Apple Pay, Google Pay, Toss Payments, PortOne and more, including SDKs that only load on pricing or checkout pages.

Is StackPulse a BuiltWith or Wappalyzer alternative?

StackPulse covers the same job for sales and growth teams: a per-domain tech stack API from $99/month for 10,000 lookups, a technology directory with website counts, and a CSV lead export that filters millions of indexed domains by stack.

How much does the StackPulse API cost?

Starter is $99/month for 10,000 lookups, Business $299 for 50,000 and Enterprise $799 for 200,000. One-time top-ups (3,000 for $29, 20,000 for $99, 60,000 for $199) roll over for one year.

BuiltWith-style data, priced for sales teams

See the stack behind any website.

Find the ecommerce platform, payment gateway, and marketing pixels on any domain. Then export the matching companies as a CSV lead list.

→ Shopify, WooCommerce, Magento, Stripe, PayPal, Klaviyo, and 150+ other signatures
→ Headless render catches tags that only load in the browser
→ One API call, or a CSV of up to 50,000 domains

Start at $99/mo Read the API docs

Try any domain in the box. Paid plans check out with PayPal. USD, cancel anytime.

allbirds.com

Example profile

Active stack

Run this across your whole TAM.

Detected across the public web

Shopify WooCommerce Magento Stripe PayPal Klaviyo Meta Pixel GA4 Cloudflare

Look up one domain

Paste a URL or call GET /v1/lookup/:domain. You get the platform, payments, pixels, and infrastructure in one JSON response.

Build a lead list

Filter the index by stack — Shopify stores on Klaviyo, WooCommerce sites without a payment provider — and download up to 50,000 domains as CSV.

Drop it into a pipeline

Monthly quota resets on the 1st (UTC). Extra credits are a one-time PayPal charge and roll over for 12 months. No annual contract.

Simple monthly plans

Subscribe with PayPal. Top-up packs are a one-time charge and roll over for one year. Prices in USD.

Most teams start here

Starter

$99/mo

10,000 lookups / month

Live API key
CSV lead export
Technology directory

Higher volume

Business

$299/mo

50,000 lookups / month

Everything in Starter
5× the monthly quota
Same per-lookup CSV pricing

Enrichment pipelines

Enterprise

$799/mo

200,000 lookups / month

Everything in Business
20× the Starter quota
Email support included

Browse websites by technology

Live counts from the StackPulse index. Each page lists example sites, market share and the technologies used alongside.

Websites using ShopifyeCommerce platform Websites using WooCommerceeCommerce platform Websites using StripePayment gateway Websites using PayPalPayment gateway Websites using KlaviyoMarketing automation Websites using Meta PixelAdvertising Websites using Google Tag ManagerTag management Websites using CloudflareInfrastructure

Open the full technology directory →

Frequently asked questions

How do I find out what technology a website is built with?: Enter the domain in the lookup above. StackPulse fetches the public pages, matches HTML, scripts and response headers against a signature library of ecommerce platforms, payment gateways, marketing pixels and infrastructure, and for storefronts renders the page in a headless browser to catch client-side tags.
Can StackPulse tell which payment gateway a website uses?: Yes. It detects Stripe, PayPal, Braintree, Adyen, Klarna, Afterpay, Square, Shop Pay, Apple Pay, Google Pay, Toss Payments, PortOne and more, including SDKs that only load on pricing or checkout pages.
Is StackPulse a BuiltWith or Wappalyzer alternative?: StackPulse covers the same job for sales and growth teams: a per-domain tech stack API from $99/month for 10,000 lookups, a technology directory with website counts, and a CSV lead export that filters millions of indexed domains by stack.
How much does the StackPulse API cost?: Starter is $99/month for 10,000 lookups, Business $299 for 50,000 and Enterprise $799 for 200,000. One-time top-ups (3,000 for $29, 20,000 for $99, 60,000 for $199) roll over for one year.