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Find lookalike companies

The endpoint matches the seed website, searches up to three focused candidate groups in Superdata, and ranks the returned company profiles by shared topics, industry, and team size. It works when the seed has no LinkedIn “Similar pages” data. Scores are heuristic comparisons of available profiles, not a provider-certified similarity score. Results are a bounded candidate set, not every company in the directory. Use this endpoint for the ranked matches shown on the Company Lookalikes dashboard page. The dashboard calls /api/playground/company/lookalikes with your session; API-key requests use the /v1/company/lookalikes URL above. Similar Companies API is a separate endpoint that returns related company IDs instead of ranked profiles. Use a Bearer key with companies:read or mcp:use scope. One credit is used for the seed match and one for each completed candidate search, up to four credits per request. The exact usage is returned in meta.credits_used.
data.seed identifies the matched company. data.results contains up to 50 ranked companies with domain, description, match score, reasons, keywords, industry, location, workforce counts, and founded year where available. data.candidate_queries shows the source queries used. data.partial is true if a candidate search failed but other candidate groups succeeded. Invalid or duplicate parameters return 400; an unmatched seed domain returns 404. See errors and limits.