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How to Use BuiltWith at Scale for Free to Find High-Intent Leads

Generate high-intent leads by knowing what toolset they are using and do this for FREE on scale.

IlyaIlya AzovtsevCo-founder4 min read
A large 0 over the words Clay credits beside an open clay toolbox, a padlock badge and an Own key tag.
On this pageHow to find anyone’s tech stack in Clay?
  1. How to find anyone’s tech stack in Clay?
  2. How to find anyone’s tech stack in Clay FOR FREE?
  3. How to use it?

In this article, I’ll show you how to reach out to the most high-intent leads in your niche by leveraging BuiltWith on scale… and for FREE.

I’m pretty sure you know what BuiltWith is, but for the beginners:

BuiltWith.com is a data platform that dynamically finds the tool-stack every domain is using.

That means if you want to know:

  • what is the E-commerce platform XYZ shop is using? - BuiltWith shows it.
  • what chat tool a SaaS XYZ is using? - BuiltWith shows it.
  • what CRM company is using? - BuiltWith shows it.
BuiltWith technology profile of a domain listing its analytics and tracking tools, such as Instantly, Facebook Pixel and Google Analytics

You see where it goes… if you need to find out the list of tools any company is using - BuiltWith shows it!

Why it’s important for your cold emailing?

Basically, you can narrow down the niche you want to reach out and make the reference to the platform they are using.

Slide: relevancy, reaching companies who feel the pain now, matters more than personalisation, referencing what you know about them

For example, if you’re selling E-commerce development, it’s critical to know whether companies you’re reaching out to using Magento or another platform.

Or if you’re selling SaaS product that competes with Intercom, you can easily determine what competitor these companies are using!

Looks like an amazing thing (and it is), but the BuilWith’s pricing is … 😅

BuiltWith plans and pricing page: Basic at $295, Pro at $495 and Team at $995 per month

So today I’ll show you how to get the list of technologies & tools companies are using! For FREE (or almost for FREE).

For this we’ll need to use:

So let’s start!

How to find anyone’s tech stack in Clay?

Imagine, we have a list of contacts with domains we need to reach out to and our main goal is to figure out what tool stack each domain/company is using.

For this we’re going to use Clay (https://clay.com/) - it’s an advanced data enrichment & orchestration platform for outbound lead gen.

Clay table of imported software development companies with description, size, location, domain and tech stack columns

For those who have never heard about it, just imagine you’re using Google Sheets with all the necessary integrations you need (such as finding emails, figuring out the traffic, website speed, and so on) directly in your Clay table (that looks like Google Sheets).

Clay work email waterfall trying Findymail, LeadMagic, Prospeo, DropContact, Hunter and Datagma in turn until one finds the email

There are tons of integrations & data providers to match your needs, but today we’re talking about - finding out the tool stack a company is using (on scale).

You can do this directly in clay.com by using a BuiltWith integration:

  1. You need to upload a list of contacts with domains:

    Clay new table screen with the CSV upload dialog open over the import options
  2. Click on “Add enrichment”

    Clay table with a red arrow pointing to the Add enrichment button in the top right corner
  3. Search for “Find Technology Stack”

    Clay Find Technology Stack enrichment panel with the Clay-managed BuiltWith account at 2 credits per row highlighted

As a result, clay.com will return you the list of all technologies each domain is using 🥳

Clay Find Technology Stack column showing technologies found per company, with the full list of 270 for one domain opened

But, Clay charges for each search 2 credits (which is not a small number). Considering Clay’s pricing, for $149/m you’ll be able to enrich & find out the technology of only 1000 domains per month (and you don’t have any extra credits to spend on other enrichments & integrations).

Clay pricing table: Free at $0, Starter at $149, Explorer at $349 and Pro at $800 per month, with credits per plan

But we found a workaround way to do the same thing, but without spending money (or just a few dollars 💰️).

How to find anyone’s tech stack in Clay FOR FREE?

Or it’s better to say, almost for free (it’ll cost you a few $).

Here is how:

Step #1 - Clean up the domain names

Sometimes your might have the URLs with https:// and so on. Our goal is to get a pure domain name such as “domain.com” as an output.

So for this, we’re going to create a new column and use AI formula in Clay:

Clay Add column menu with the Formula option highlighted next to a Domain column holding mixed URLs

and in a human way we explain what we need (get a domain) and Clay will transform it into a “formula”:

Clay Formula Generator turning a plain-English request into a formula that strips https and www from each domain

As a result, we have a list of clean domain names:

Clay table with the original Domain column next to a Domain Extraction column of clean domain names

Step #2 - Find BuiltWith links based on domains

Basically you can find anyone’s public BuiltWith page with the list of technologies this domain is using.

And the format of this public page is always the same: “https://builtwith.com/domain.com”

Public BuiltWith technology profile page opened at the address builtwith.com followed by the domain

So we use AI formula to create the list of BuiltWith public pages per each domain:

Clay Formula Generator building a BuiltWith URL for each company domain, with sample outputs

Step #3 - Extract BuiltWith data on a scale

For this, we’ll be using Claygent (it’s a web scraping bot with AI in-built).

Clay Add enrichment search for claygent, with Claygent (AI Web Researcher) at 2 credits per row highlighted

Since it’s advanced scraping, we can explain in a human way what we need to get and Claygent will do this for us!

Claygent (AI Web Researcher) setup panel with a model selector and an empty Mission prompt field

In this case, we just need to do a simple thing:

Claygent mission: check the BuiltWith URL column and return each technology found as a separate result

As a result, Claygent will return us the list of technologies each domain is using:

Clay table of contacts with a Technology List column filled by Claygent, one cell opened to show the full list

But Claygent also costs credits?!

So, on every Clay plan, you can add your API keys to any tool Clay has an integration with. In this case, you can add your own OpenAI API key and Clay will NOT charge you any credits/money for that!

Claygent model selector where GPT-4o-mini can run on your own API key instead of Clay credits, key icon highlighted

As a result, on a huge scale, you can save hundreds or even thousands of dollars on it!

And spend just a few buck:

OpenAI pricing for GPT-4o models per million input and output tokens, with a vision pricing calculator

How to use it?

Now we know what tool stack companies are using, it’s time to personalize our outreach!

Clay table of contacts with BuiltWith URLs and a Technology List column filled in for each company

Here is the list of examples how you can use Tech look-up results:

How to personalize outreach by the tools a company uses
If you're sellingWhether company is usingHow to personalize email outreach
SEO servicesGoogle Analytics“I see you’re using Google Analytics, but have you considered optimizing your data tracking for better SEO insights?”
Hosting servicesAWS or Cloudflare“As you’re using AWS for hosting, we can help you optimize server costs while improving scalability.”
Marketing automationHubSpot or Marketo“With HubSpot already in place, we can show you advanced automation tactics to increase lead conversions.”
CRM solutionsSalesforce“We specialize in Salesforce integrations that can enhance your sales pipeline management.”
Payment processingStripe or PayPal“Since you’re using Stripe, we can offer additional payment gateway solutions to reduce transaction fees.”
CybersecurityCloudflare“We noticed your site uses Cloudflare. Our cybersecurity solution can further safeguard your customer data.”
E-commerce toolsShopify or Magento“As a Shopify user, we offer plugins that can help boost your store's conversion rates.”
Customer support toolsZendesk or Intercom“You’re using Intercom for customer support, and we can help you scale your customer service with AI-driven chat solutions.”
Advertising servicesGoogle Ads“We see you’re running Google Ads—our team can help you maximize ad ROI with advanced targeting strategies.”
Video hostingWistia or Vimeo“Using Wistia for video hosting? We can enhance your video marketing strategy with personalized video funnels.”
Email marketingMailchimp or ActiveCampaign“We noticed you’re using Mailchimp. Let us help you create highly targeted email campaigns that convert better.”
Web designWordPress or Squarespace“As a WordPress user, we offer custom themes and speed optimization services that can enhance user experience.”
A/B testing servicesOptimizely“We noticed you’re using Optimizely for A/B testing—let us help you design more impactful experiments for higher conversion rates.”

With 🫰 to your Growth,

Ilya (let’s connect on LinkedIn)

Talk to the team that runs this every day

Book a 30-minute call. We look at your outbound and tell you what we would change first.

Ilya

Ilya AzovtsevCo-founder

Co-founder of GrowthBand. Helped scale lemlist from $20k MRR to $10M ARR and built automation at Expandi; now runs the cold email infrastructure behind 32,000+ mailboxes.