Tech Stack Detector

What does Tech Stack Detector do?

Tech Stack Detector is a fast, low-cost Wappalyzer and BuiltWith alternative you can run in bulk. Give it a list of domains and it tells you which technologies each website uses: CMS, ecommerce platform, analytics and tag managers, JavaScript frameworks, CDN, hosting, web server, marketing automation, CRM, live chat, payment providers, cookie banners, and the company's email provider (Google Workspace, Microsoft 365 and others).

It works like a technology lookup API. It fetches each homepage once, the way a normal browser visit would, and matches the response against 7,600+ open Wappalyzer-compatible fingerprints. It also reads the domain's public DNS records to find SaaS tools the company has verified (HubSpot, Salesforce, Zendesk, Atlassian, DocuSign, Stripe and many more). There's no browser, no login and no API key, so it's quick and cheap: 1,000 domains cost about $4.

Typical uses:

• Sales prospecting: "find all Shopify stores in my lead list that use Klaviyo"
• Competitive intelligence: "which analytics and A/B testing tools do my competitors use?"
• Lead enrichment: add CMS, ecommerce platform and email provider columns to your CRM
• Agency audits: check a client's site for outdated frameworks, missing cookie consent or a slow CDN setup

Why use Tech Stack Detector?

• About 25× cheaper than the market leader. $4 per 1,000 domains instead of $100 per 1,000, with volume discounts on higher Apify plans.
• Bulk by design. Paste 10 or 100,000 domains. Concurrency and timeouts are configurable, and every domain becomes one clean row.
• Website and company signals in one row. websiteTechnologies holds what the homepage actually loads. dnsVerifiedServices holds SaaS tools the company has verified ownership for in DNS, which are strong buying signals for B2B sales.
• Flat columns ready for your CRM. cms, ecommerce, analytics, tagManagers, javascriptFrameworks, cdn, hosting, crm, marketingAutomation, liveChat, paymentProcessors, emailProvider. They map straight onto spreadsheet or CRM fields.
• Versions and confidence. Each technology includes the detected version (e.g. WordPress 6.6, jQuery 3.7.1), a confidence score and the vendor website.
• Failed lookups are free. Domains that don't resolve or time out are included with an error field and are not charged.
• No browser, no proxies. Each domain needs one HTTP request plus four tiny DNS-over-HTTPS queries, so runs finish in seconds.
• Schedulable and API-ready. Run it on a schedule, call it from Make, Zapier or n8n, or let an AI agent call it through the Apify API or MCP server.

What data can you extract?

Field	Example	Description
domain	allbirds.com	Normalised domain (without www.)
finalUrl	https://www.allbirds.com/	URL after redirects
statusCode	200	HTTP status of the homepage
pageTitle	Allbirds: Sustainable Shoes...	<title> of the page
technologyCount	15	Number of technologies detected
technologyNames	Shopify, Cloudflare, PayPal, ...	All names as one comma-separated string (handy for CSV)
websiteTechnologies	["Shopify", "Cloudflare", ...]	Technologies detected from the website itself
dnsVerifiedServices	["Microsoft 365", "DocuSign", ...]	SaaS tools detected from DNS (MX/TXT/NS/SOA)
cms	["WordPress"]	Content management systems and blogs
ecommerce	["Shopify"]	Ecommerce platforms and frontends
analytics	["Mixpanel"]	Analytics tools
tagManagers	["Google Tag Manager"]	Tag managers
javascriptFrameworks	["React", "Next.js"]	JS and UI frameworks
webFrameworks / webServers / programmingLanguages	["Nginx"], ["PHP"]	Server side
cdn / hosting	["Cloudflare"], ["Vercel"]	CDN, PaaS, IaaS, hosting
marketingAutomation / crm / advertising	["HubSpot"]	Marketing stack
liveChat / paymentProcessors / cookieCompliance / security	["Zendesk"], ["Stripe"], ["OneTrust"]	Other common columns
emailProvider	Google Workspace	Derived from MX records
mxRecords	["aspmx.l.google.com", ...]	Raw MX hosts
technologies	see below	Full detail: name, categories, version, confidence, website, detectedVia
error	null	Error message if the site could not be analysed
checkedAt	2026-10-04T12:00:00+00:00	Timestamp

How to use Tech Stack Detector (step by step)

1. Click Try for free (you need a free Apify account; new accounts get monthly free credits).
2. Paste your domains into Domains or URLs, one per line. Bare domains (example.com) and full URLs (https://shop.example.com/de) both work.
3. Optional: under Only these categories, enter e.g. Ecommerce or CRM to keep only those technologies.
4. Leave Include DNS checks on if you want the email provider and DNS-verified SaaS tools.
5. Click Start. A run with a few hundred domains usually finishes in under a minute.
6. Download the results as JSON, CSV, Excel or HTML, or open the "Marketing & sales tools" view in the dataset tab.

Input example

{
  "domains": ["allbirds.com", "gymshark.com", "wordpress.org", "vercel.com"],
  "includeDns": true,
  "onlyCategories": [],
  "minConfidence": 0,
  "maxResults": 1000,
  "concurrency": 10,
  "timeoutSecs": 15
}

If you start the actor with an empty input, it analyses five example sites (apify.com, shopify.com, wordpress.org, spotify.com, klarna.com) so you can see the output format straight away.

Output example

[
  {
    "input": "allbirds.com",
    "domain": "allbirds.com",
    "finalUrl": "https://www.allbirds.com/",
    "statusCode": 200,
    "pageTitle": "Allbirds: Sustainable Shoes & Clothing",
    "technologyCount": 15,
    "technologyNames": "Shopify, HSTS, HTTP/3, Open Graph, Cloudflare, Apple Pay, PayPal, Google Tag Manager, Swiper, Priority Hints, Microsoft 365, DocuSign, Miro",
    "websiteTechnologies": ["Shopify", "HSTS", "HTTP/3", "Open Graph", "Cloudflare", "Apple Pay", "PayPal", "Google Tag Manager", "Swiper", "Priority Hints"],
    "dnsVerifiedServices": ["Microsoft 365", "DocuSign", "Miro"],
    "cms": [],
    "ecommerce": ["Shopify"],
    "analytics": [],
    "tagManagers": ["Google Tag Manager"],
    "javascriptFrameworks": [],
    "cdn": ["Cloudflare"],
    "paymentProcessors": ["Apple Pay", "PayPal"],
    "emailProvider": "Microsoft 365",
    "mxRecords": ["allbirds-com.mail.protection.outlook.com"],
    "technologies": [
      {"name": "Shopify", "categories": ["Ecommerce"], "version": null, "confidence": 100, "website": "https://shopify.com", "detectedVia": "website"},
      {"name": "Cloudflare", "categories": ["CDN"], "version": null, "confidence": 100, "website": "https://www.cloudflare.com", "detectedVia": "website"}
    ],
    "error": null,
    "checkedAt": "2026-10-04T12:00:00+00:00"
  },
  {
    "input": "wordpress.org",
    "domain": "wordpress.org",
    "statusCode": 200,
    "technologyNames": "WordPress, Gutenberg, Nginx, PHP, MySQL, Google Tag Manager, ...",
    "cms": ["WordPress"],
    "webServers": ["Nginx"],
    "programmingLanguages": ["PHP"],
    "emailProvider": "Other / self-hosted",
    "error": null
  }
]

Every export format is available from the dataset: JSON, CSV, Excel (XLSX), XML, RSS and HTML table. Array columns become comma-separated cells in CSV and Excel.

How much does it cost?

The actor uses pay-per-event pricing. You only pay for domains that were analysed successfully.

Event	Price	When it's charged
Actor start	$0.0005	Once per run
Domain analysed	$0.004	Per domain with a result. Unreachable domains are free

Apify subscribers get automatic volume discounts on the per-domain price: Bronze −15%, Silver −30%, Gold and above −45%.

Worked examples (Free/Starter prices):

• 100 domains ≈ $0.40
• 1,000 domains ≈ $4.00, against about $100 with the leading Wappalyzer-replacement actor
• Daily check of 200 competitor domains ≈ $0.80 a day, about $24 a month
• Enriching a 10,000-row lead list once ≈ $40

Platform compute is included in the price. You pay nothing extra for memory or proxies. Apify's free plan includes monthly credits, enough to analyse roughly a thousand domains a month at no cost.

Use cases

Sales and lead generation

Filter lead lists by technology: "Shopify stores using Klaviyo", "WordPress sites without a cookie banner", "companies on Microsoft 365 that use HubSpot". Use dnsVerifiedServices as buying signals. A company with Salesforce and Zendesk verified in DNS is a mid-market B2B buyer.

Competitive intelligence

Track which analytics, A/B testing, personalisation and ad tools your competitors use, and schedule a weekly run to spot when they switch platforms.

Agencies and SEO audits

Audit client and prospect websites in bulk: CMS and version, page builders, CDN, caching, security headers (HSTS) and cookie compliance tools. Outdated versions are easy to spot in the version field.

Market research and investing

Measure technology adoption across a market segment, for example ecommerce platform share among the top 5,000 Nordic web shops.

Data enrichment for CRM and AI agents

Add cms, ecommerce and emailProvider to every account in your CRM, or let an AI agent call the actor when it needs to know "what is this company's website built with?"

Use with AI agents, MCP and the API

The actor is easy for agents to call. The input is small, the defaults are sensible, and the output is one compact JSON row per domain.

cURL (synchronous, returns the dataset items):

curl -X POST "https://api.apify.com/v2/acts/teddythebuilder~tech-stack-detector/run-sync-get-dataset-items?token=YOUR_APIFY_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"domains": ["allbirds.com", "vercel.com"]}'

Python (pip install apify-client):

from apify_client import ApifyClient

client = ApifyClient("YOUR_APIFY_TOKEN")
run = client.actor("teddythebuilder/tech-stack-detector").call(run_input={"domains": ["allbirds.com", "vercel.com"]})
for row in client.dataset(run["defaultDatasetId"]).iterate_items():
    print(row["domain"], row["ecommerce"], row["emailProvider"])

MCP: add the Apify MCP server (https://mcp.apify.com) to Claude, Cursor or any MCP client, then ask it to "use teddythebuilder/tech-stack-detector to check which CMS these 20 domains use".

Integrations

• Google Sheets: export the dataset or use the Apify Google Sheets integration to append rows automatically.
• Make, Zapier and n8n: start runs and fetch results with the official Apify apps or nodes.
• Webhooks: get notified when a run finishes and push the results to your CRM (HubSpot, Pipedrive, Salesforce).
• Schedules: use Apify Schedules to re-check domains daily, weekly or monthly.

Data source and legality

• Fingerprints: the open-source, community-maintained webappanalyzer dataset (Wappalyzer-compatible format, GPL-3.0), pinned to a specific version in each build. Technology names and logos belong to their respective owners.
• Website data: the actor makes one ordinary GET request to the homepage or URL you supply, with an honest User-Agent, and reads only what any browser receives: HTTP headers, cookie names, meta tags, script URLs and HTML.
• DNS data: public DNS records via Cloudflare DNS-over-HTTPS.
• No personal data: the output describes technologies, not people. Cookie values are never output.
• Only analyse websites you have a legitimate interest in, and respect each site's terms.

Limitations

• Detection runs without a JavaScript-executing browser. Technologies visible only after JavaScript runs (some analytics tags injected by a tag manager, or client-side-only widgets) can be missed. Server-rendered and HTML-referenced technologies, which cover the large majority of fingerprints, are detected reliably.
• Sites behind aggressive bot protection may return a challenge page (status 403/503). The actor still reports what it can, such as CDN, bot protection and DNS services, and notes the status in error.
• Only the URL you provide is fetched (usually the homepage). Technologies used only on deeper pages, such as checkout, may not appear.

FAQ

How accurate is it? It uses the same fingerprint format as Wappalyzer, with 7,600+ technologies. CMS, ecommerce platforms, CDNs, web servers, frameworks and email providers are detected very reliably. Purely JavaScript-injected tools are the main blind spot (see Limitations).

What's the difference between websiteTechnologies and dnsVerifiedServices? websiteTechnologies are found in the website's own response. dnsVerifiedServices come from the domain's DNS records (MX, TXT verification tokens, NS, SOA). They show tools the company uses, even if they don't appear on the website.

Do I pay for domains that fail? No. Domains that don't resolve, refuse the connection or time out are included with an error field and are not charged.

Can I check specific pages instead of homepages? Yes. Enter a full URL such as https://example.com/shop and that exact page is analysed.

How many domains can I check per run? Up to 100,000 per run. For very large lists, raise concurrency to 20–30 and split the list into several runs.

Can I use it on the free plan? Yes. Apify's monthly free credits cover roughly a thousand domains a month.

I need a technology or field that's missing. Open an issue on the actor's Issues tab. We usually reply within 24 hours. If the actor saves you time, a short review helps other users find it.

Related actors

• Shopify & WooCommerce Products Scraper: full product catalogues (prices, variants, SKUs, stock) from the Shopify and WooCommerce stores you find here, with a price and stock change monitor.
• Domain WHOIS & DNS API: bulk WHOIS/RDAP registrar and expiry dates, domain availability, DNS records, SPF/DMARC email security grade and SSL certificate expiry in one row per domain.
• Website SEO Audit Crawler: crawl a site and audit every page for broken links, redirects, titles, meta descriptions, canonicals, noindex, schema and sitemap coverage. Pair it with Tech Stack Detector for a full website report.
• Nordic Company Registry API: companies from Sweden, Norway and Finland with industry codes. Combine it with Tech Stack Detector to build tech-filtered Nordic lead lists.
• Swedish Jobs Scraper: job ads and hiring companies from Platsbanken.
• Nordic Tenders Scraper: public procurement notices from Nordic buyers.
• Career Site Jobs API: jobs straight from company career sites on Greenhouse, Lever, Ashby, Workable, Recruitee and Teamtailor in one schema, with new/removed-job tracking.

Changelog and support

• 1.0 (2026-10): first release. 7,600+ fingerprints, DNS-based email provider and SaaS detection, flat category columns, free failed lookups.

Questions or bugs? Open an issue. We reply within 24 hours.