Share of Voice
Consensus definition
SoV adapts the classic marketing measure to LLM answers: your mentions divided by the total mentions of the whole competitor set, across a prompt set. It is intuitive and widely used as a relative-standing read.
rhinegold operator refinement
Rhinegold's refinement: SoV is only as honest as its competitor set. An incomplete set systematically inflates a brand's SoV, and the bias grows as the market adds players. Naïve counting also over-counts brands with several aliases — span-aware detection corrects it. Read SoV as a directional share, not an absolute; when exclusivity is the real question, Brand Recommendation Share is the competition-weighted refinement.
Operational use
SoV gives a quick read of relative standing across a competitor set and is well suited to tracking that standing over time.
Measurement boundary
It is sensitive to competitor-set completeness — an incomplete set inflates the number — and to alias over-counting. And it says nothing about exclusivity or about whether the brand was cited as a source.
Distinct from
Against Mention Rate, which is absolute presence, not a relative share. Against Brand Recommendation Share, which weights each answer by how many providers were named. Against Citation Rate, which is about authority, not share of mentions. Against Aided vs Unaided Brand Recall in GEO, which is a prompt-level partition applied before any SoV calculation — a brand's SoV on prompts that name it is not the same construct as its SoV on prompts that do not. Against Prompt Coverage, which measures how many of the prompts in the set the brand reaches at all, rather than its relative weight among co-named providers.
Operational note
Common mistakes
- Trusting SoV computed against an incomplete competitor set.
- Naïve counting that over-credits brands with multiple aliases.
- Reading SoV as exclusivity rather than relative share.
Where consensus is missing
Neither the counting rules nor the competitor-set definition are standardized across tools, so cross-tool SoV figures are not comparable.
Sources & deeper reading
- rhinegold Insights, Episode 04 — How to Measure What You Can't See (GEO metrics for B2B)
- rhinegold competitor-set discovery and verification methodology — applied with engaged clients and partners.