# Find Companies Similar to Your Best Customers

**Use case:** 

Paste the website domains of your best customers and get companies like them: same industry, same country and between half and twice the headcount. Each lookalike comes with domain, company page, industry, size, HQ, founding year and last funding round, and which of its traits matched. Swap the example seeds for your customers.

## Input

```json
{
  "seedDomains": [
    "linear.app",
    "posthog.com"
  ],
  "maxPerSeed": 25,
  "sameCountry": true,
  "sameSize": true,
  "countries": []
}
```

## Output

```json
{
  "_status": {
    "label": "Status",
    "format": "string"
  },
  "seed": {
    "label": "Seed",
    "format": "string"
  },
  "companyName": {
    "label": "Company",
    "format": "string"
  },
  "domain": {
    "label": "Domain",
    "format": "string"
  },
  "matchedOn": {
    "label": "Matched on",
    "format": "string"
  },
  "industry": {
    "label": "Industry",
    "format": "string"
  },
  "employeeCount": {
    "label": "Employees",
    "format": "number"
  },
  "employeeRange": {
    "label": "Size band",
    "format": "string"
  },
  "country": {
    "label": "Country",
    "format": "string"
  },
  "hqLocality": {
    "label": "HQ",
    "format": "string"
  },
  "founded": {
    "label": "Founded",
    "format": "number"
  },
  "linkedinUrl": {
    "label": "LinkedIn page",
    "format": "string"
  },
  "lastRoundType": {
    "label": "Last round",
    "format": "string"
  },
  "lastRoundDate": {
    "label": "Round date",
    "format": "string"
  },
  "description": {
    "label": "Description",
    "format": "string"
  },
  "_input": {
    "label": "Input",
    "format": "object"
  },
  "_note": {
    "label": "Note",
    "format": "string"
  },
  "_error": {
    "label": "Details",
    "format": "string"
  }
}
```

## How it works

### 1. Sign up on Apify or log in

The Lookalike Company Finder — Similar Companies by Domain Actor is ready to run with the inputs already set for "Find Companies Similar to Your Best Customers". [Sign up or log in](https://console.apify.com/create-task-from-example/Q75VZdNVioGOvTmhF) and you'll land in Apify Console with a copy of this exact task.

### 2. Start the "Find Companies Similar to Your Best Customers" task

The Lookalike Company Finder — Similar Companies by Domain Actor will start running based on the input automatically. You can also change all the input fields, like seed company domains, maximum lookalikes per seed (limited for free users), and more, to match your specific use case.

### 3. Receive the "Find Companies Similar to Your Best Customers" output

Monitor the progress in real time. You will be notified as soon as your dataset is complete and ready for review. Each result includes data such as status, seed, company, and more.

### 4. Integrate into your workflow

The final output is delivered in JSON, CSV, or Excel format, ready to be plugged into your workflow. You can also [run the "Find Companies Similar to Your Best Customers" task via API](https://apify.com/b2bsearch/lookalike-company-finder.md).

## FAQ

### How does the lookalike companies task define similar?

The lookalike companies task reads each seed's industry, country and headcount and returns companies that share the industry and country and have between half and twice the employees.

### Can I find lookalikes in another country?

Set Countries in the lookalike companies task, for example de or gb, to search there instead of in the seed's own country, up to 10 countries.

### Why turn off same size?

With Same size off, the lookalike companies task ignores headcount, useful when a seed is small and you want larger companies in the same industry. It is not applied to seeds under 10 people anyway.

### What do I do with the lookalikes next?

Pass the lookalike domains to a decision-maker search by domain, or to Company Employees, to reach the right people at each company the lookalike companies task found.

## About this Actor

This example demonstrates how to use [Lookalike Company Finder — Similar Companies by Domain](https://apify.com/b2bsearch/lookalike-company-finder.md) with a specific input configuration. Visit the [Actor detail page](https://apify.com/b2bsearch/lookalike-company-finder.md) to learn more, explore other use cases, and run it yourself.


## How to integrate an Actor?

This Task's input is already configured above. Use it as-is rather than inventing a new one.

Do not guess an integration path. Every one of them is in the agent quickstart at https://apify.com/agents.md: the Apify MCP server, Agent Skills with the Apify CLI, the JavaScript and Python clients, the REST API, and the account-free path for an agent with no human to sign in. It also carries the rule on stating cost before the first paid run.

For full API examples (JavaScript, Python, CLI, MCP, OpenAPI), see this Task's Actor page: https://apify.com/b2bsearch/lookalike-company-finder.md

Each client library has reference documentation the quickstart does not restate: [JavaScript/TypeScript](https://docs.apify.com/api/client/js/docs.md) (`npm install apify-client`) and [Python](https://docs.apify.com/api/client/python/docs.md) (`pip install apify-client`).