Share of voice is your value divided by your value plus your competitors' combined value, shown as a percentage.
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A share of voice calculator turns your brand's visibility and your competitors' combined visibility into a single percentage, showing what portion of the conversation, the ad impressions, or the search results your brand actually owns.
Share of voice can be built from brand mentions across media and social, paid or organic search impressions, advertising spend, or share of search results for category keywords. No single metric is universally correct. What matters is consistency: whichever one you choose, apply it identically to your brand and to every competitor in the comparison, over the same time window.
Share of voice measures visibility, not sales. Advertising effectiveness research by Les Binet and Peter Field found that brands whose share of voice exceeds their share of market tend to gain market share over time, a relationship often called the excess share of voice effect. It is a directional signal worth watching, not a guarantee, since pricing, product quality and conversion still decide whether extra visibility turns into revenue.
Paid media is the fastest lever, but not the only one. Organic search visibility and AI answer citations both count toward most mentions-based or search-based share of voice metrics, and they compound rather than switching off the moment a budget runs out. That durability is exactly why organic visibility work tends to produce a more capital-efficient share of voice over the long run than paid spend alone.
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