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Every lead Lusha surfaces is ranked using two underlying scores - Signal Score and ICP Fit Score. Together they make up the overall Lead Score you see on recommended contacts and companies. Understanding what each one measures helps you know why a lead surfaced, and which to prioritize first.

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Signal Score

Signal Score is a 0-100 ranking of how much real-world buying activity is happening around a contact or company right now: the number of qualifying signals present, divided by the maximum signals available. Every signal counts equally. Company signals include:
  • Surge in Hiring (overall, and by location or department when a matching Target Profile is configured)
  • Headcount Increase (1, 3, 6, and 12-month windows)
  • Website Traffic Increase
  • IT Spend Increase
  • Buying Intent (LinkedIn Activity Intent, when a matching Target Profile is configured)
Contact signals include:
  • Moved to a New Company
  • Promotion
  • All of the company signals above, inherited from the contact’s current employer
If a contact or company has no qualifying signals, it shows as “No active signals” rather than a blank cell or a 0 - so you can always tell a true zero-signal record from missing data. Signals refresh from Lusha’s signal data periodically (not real-time), so scores can lag slightly behind the underlying event.

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Where Signal Score is available

In the Lusha platform, Signal Score is shown from 0-100. Via the API and MCP, it’s returned as a value from 0-1.
See the Lusha MCP Server and API overview articles for how to pull Signal Score for your own lists.

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ICP Fit Score

ICP Fit Score measures how closely a contact or company matches the Account Criteria and Persona Criteria in your Target Profile. The more precisely your Target Profile is configured, the more accurate the fit score.

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Where ICP Fit Score is available

Via API and MCP, you bring a list and pick 1-3 of your Target Profiles (recommended) or ask to run it against all of your ICPs. Each contact or company gets a fit score from 0-1 plus the Target Profile it matches best. Cost is 1 credit per contact or company, regardless of how many profiles it’s scored against - a score of 0 is still a real answer and is charged. Up to 100 contacts or companies per call. If you don’t have a Target Profile yet, you can build one directly in the MCP conversation, then score your list against it without leaving MCP - see the Lusha MCP Server article for details. See ICP Hub: Setup, Scoring, and Recommendations for the full guide to Target Profiles, Inclusion Rules, and Exclusion Rules.

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How they combine

Signal Score and ICP Fit Score are combined into a single Lead Score, which determines the ranking order in your Recommendations Home table - see Credits and the unified recommendations list for how Lead Score and Signals appear there. A lead with strong signals but a weak ICP match, or vice versa, will rank differently than one that’s strong on both.