How to measure PR share of voice against your competitors

Knowing your brand got covered somewhere this month is not the same as knowing whether you are winning the conversation. Share of voice answers the second question. It takes the same weekly PR monitoring habit most teams already run and turns it into a number you can chart against your competitors, month over month.

What is PR share of voice?

PR share of voice is your brand's portion of the published coverage in your category, counted against a defined set of named competitors over a fixed period. It is not a raw count of your own mentions. Ten articles about you sounds like a lot until a rival earned forty in the same window, and share of voice is the number that shows you that gap instead of hiding it behind a total that looks fine on its own.

This is a different measurement from share of voice in AI answers, even though the two names sound alike. That figure counts how often ChatGPT, Claude, or Google's AI answers name your brand when asked a buyer's question, built from a fixed set of prompts run against those engines. PR share of voice counts how often your brand appears in actual published coverage, articles, trade press, and blogs, found through search and news search rather than prompted from a model. One measures what AI engines say about you. The other measures what journalists and publications already wrote about you. Track both if you can; they move for different reasons and a change in one does not imply a change in the other.

How do you calculate it?

1. Name your competitor set. Pick two to four rivals you are actually compared against, not every company in your category. A share-of-voice number is only useful against the competitors your buyers actually weigh you next to.
2. Run a fixed search for each brand. Search your name and each competitor's name in news search, restricted to the same period: the past week or the past month, kept consistent every time you run it.
3. Count mentions per brand, including your own. A count of "articles about us" with no denominator is not share of voice, it is just a coverage count. You need every brand's count side by side to calculate a share.
4. Weight by outlet if it matters to you. A mention in a trade publication your buyers actually read is worth more than a wire pickup syndicated forty times. A simple weighting, a full point for a notable outlet and a half point for a minor or syndicated one, is enough to start.
5. Divide your count by the total. Your (weighted) mentions divided by the combined (weighted) mentions across you and every tracked competitor in the period is your share of voice.
6. Log it with the date and repeat on a fixed cadence. One reading tells you where you stand today. The trend across several readings tells you whether that position is improving.

What counts as a mention?

Decide the edge cases before you start counting, and hold the same line every time you run the search. A named mention of the brand counts, even a brief one inside a roundup. A mention of a product without the company name attached is weaker and worth tracking separately rather than folding into the same count. Coverage that is factually wrong about you still counts as a mention for share of voice purposes, since the question here is presence in the conversation, not accuracy; a wrong mention is a separate problem worth fixing at the source, which is part of the routine described in PR monitoring without an agency.

How do you turn the number into action?

A share-of-voice number is only useful once you read it against something. Read it against your competitors first: when a rival's share climbs sharply in a single period, check what drove it before assuming it is a trend. A funded announcement, a conference, or a product launch can spike coverage for a few weeks without changing the underlying competitive position.

Read it against your own history second. A share that slides two months running, even while the absolute number of your own mentions holds steady, is a real signal, because it means the category conversation is growing faster than your part in it. That is precisely the kind of sharp, sourced move worth investigating around a specific competitor launch, where a single event can move the number enough to see in a single weekly check.

Running this by hand across several competitors every month is the part that tends to slip once the first excitement of tracking it wears off. Programmatic CMO's PR agent runs the searches on a fixed schedule, tracks the count per competitor, and charts the trend, so the number stays current whether or not anyone remembers to pull it.