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.

Free diagnostic · live API from $99

Find the tech stack behind any website.

Detect the ecommerce platform, payment gateway, marketing pixels and infrastructure of any domain. StackPulse matches HTML, scripts and response headers against a signature library — and renders storefronts in a headless browser to catch client-side tags — then stores the result for your sales and enrichment workflows. Built by PulseLabs Inc.

allbirds.com

Sample record loaded from the local database

Active stack

Need this for a pipeline? Starter includes 10,000 lookups a month.

1. Lookup

Send a domain to GET /v1/lookup/:domain. Responses are cached for edge delivery.

2. Monthly quota, then rollover

The plan quota resets on the first day of each UTC month. Purchased top-ups are used only after that quota and last 12 months.

3. Payment grace

A past-due subscription keeps working for 7 days with an X-Payment-Warning: past_due header. Cancellation stops access.

Plans

Official monthly prices. Top-up packs are one-time and roll over for one year.

Starter

$99/mo

10,000 lookups included

Business

$299/mo

50,000 lookups included

Enterprise

$799/mo

200,000 lookups 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.