Technology Lookup – Website Tech Stack & Companies Using X
Pricing
from $20.00 / 1,000 domain lookups
Website technology checker with active-use verification: CMS, ecommerce, analytics, pixels, CRM, marketing automation, chat, payments, hosting, email and DNS-verified SaaS, with evidence per technology. Reverse mode: companies confirmed using a technology. BuiltWith alternative, MCP-ready.
Domains or URLs ("acme.com", "https://www.acme.com/pricing"). One row per website with its full tech stack. Also accepted as urls, websites, startUrls or a comma-separated url string.
Optional. A technology name or vendor domain ("HubSpot", "Shopify", "Intercom", "lemlist.com"). When set, the run checks every website above and returns only the companies CONFIRMED using it — with the evidence. Leave empty to get the full tech stack of each website.
Optional, reverse mode only. Instead of a website list, discover companies by business search — e.g. "dental clinics", "marketing agencies" — together with a location below. The discovered websites are then checked for the technology.
[ "marketing agency"]City, region or country for the discovery search (e.g. "Austin, TX", "Berlin").
Upper bound on websites checked in one run.
Optional. Keep only technologies in these categories (all when empty).
Confirm each detected technology is actually live (vendor resource for the site's own id served, endpoint answers, script served) instead of trusting a leftover snippet. Recommended.
Fetch the site's GTM container and report the tags it loads (pixels, chat, ABM, analytics) that never appear in the HTML.
Read MX, SPF, CNAME, NS and verification records: email provider, email marketing stack, hosting, and SaaS the company is a verified customer of.
Remember each website's stack in a named key-value store on your account so every run reports first/last seen per technology and what was added or removed since the previous check.
Name of the key-value store that keeps the history (change it to keep separate watchlists apart).
Also output websites that do NOT use the technology (with their full stack, usesTechnology: false).
Drop technologies below this confidence (0–100). Pattern-only hits score 75, dead snippets 40, implied technologies 60.
How many websites are analyzed at once.
Per-request timeout for fetching a website.
Cap on the extra requests used to verify technologies on one website.
Optional. Requests go direct by default and fall back to Apify's datacenter proxy automatically when a website challenges the platform IP. Set a proxy here (e.g. residential) only for lists of websites that block datacenter traffic.
{ "useApifyProxy": false}Optional. Connect an Apify MCP connector (Console → Settings → Integrations → MCP Connectors, server URL https://mcp.apify.com) and the reverse-mode company discovery runs under THAT account. Leave empty to run discovery on this account.