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Create targeted lists of companies and websites by combining technology detection with LinkedIn firmographic data and verified decision-maker contacts. Lead lists are built for sales prospecting, , , and custom audience ad targeting. Lead list builder with MailChimp and Webflow selected as technology filters, OR/AND/AND NOT logic operators, website type toggle, and a preview panel showing 186.1K matching results

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Prerequisites

Before building a lead list, make sure you have:
  • A TechnologyChecker account (sign up free)
  • An organization API key (create one in Settings > Developers — see authentication)
  • Sufficient credits for the requested list size

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How to build a lead list

Build custom lead lists with multi-dimensional filtering.
Use AND NOT to exclude websites using a competitor’s product. For example: “Uses Mailchimp AND NOT HubSpot” finds Mailchimp users you could convert.

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List size options

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What data columns are included

Each lead list can include up to 14 data fields:

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Workflow

1

Configure filters

Set technology, keyword, geography, and company filters to define your target audience.
2

Preview

See the estimated count and credit cost before creating the list.
3

Name and create

Give the list a name and submit. Processing happens asynchronously.
4

Download

Export when ready in CSV or JSON format.

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List statuses

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Preview and export

  • Preview table — First 20-50 results with all configured columns
  • Export formats — CSV and JSON
  • Technology resolution — Technology IDs are resolved to human-readable names
  • Sorting and search — Filter and sort within preview results
  • Custom audience format — Export contacts formatted for LinkedIn Matched Audiences, Facebook Custom Audiences, and Google Customer Match

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Custom audience exports

Export verified email lists from any lead list directly into ad platforms for technology-based audience targeting:
  • LinkedIn Matched Audiences: Upload technology-segmented professional contacts
  • Facebook Custom Audiences: Role + technology targeting at scale
  • Google Customer Match: Technology-qualified contacts for Search and Display
  • Suppression lists: Exclude companies already using your technology from ad spend
  • Dynamic refresh: Re-export as subscriber/churn signals update the data
Example: Export all “VP Operations” contacts at companies using Airtable, filtered to US companies with 50-500 employees — upload to LinkedIn as a Matched Audience for targeted ABM campaigns.
Start with a smaller list (1,000) to validate your filters before generating a large export. This saves credits and helps you refine your targeting.

Domain lookup

Scan any website to see its full technology stack.

Use cases

Sales workflows and lead generation strategies.

Company data API

Firmographic enrichment and company search via API.

Credits

Understand credit costs for list generation.

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Frequently asked questions

You can generate lists up to 100,000 leads in a single request. Available sizes are 1,000, 5,000, 10,000, 25,000, 50,000, and 100,000. Start with a smaller list to validate your filters before scaling up.
Lead lists can be exported as CSV or JSON. Both formats include all data columns you selected when creating the list. Technology IDs are automatically resolved to human-readable names in the export.
OR returns domains using any of the selected technologies. AND returns only domains using all selected technologies. AND NOT excludes domains using the specified technology. For example, “Uses Mailchimp AND NOT HubSpot” finds Mailchimp users who don’t also use HubSpot.
Lists are generated asynchronously. Small lists (1,000-5,000) typically complete in seconds. Larger lists (50,000-100,000) are queued and may take a few minutes. You’ll see a “Processing” status until the list is ready for download.