Starbucks Protein Coffee Market Report: Sales Volume, Market Share, Leading Brands & Market Trends

Premier Protein is the best-performing starbucks protein coffee brand in July 2026, moving 150,000 units across 4 ASINs for 46.9% of Top 10 volume. Core Power follows with 70,000 units (21.9%), ahead of STOK on 60,000 units (18.8%).

With 4 brands splitting the Top 10 and 87.5% of volume sitting with three of them, this is a concentrated shelf — the leaders hold multiple listings or one very high-velocity ASIN, so a new entrant competes against established review moats rather than an open field. Average selling prices among the leaders run from $5.60 to $41.88, which frames the price band a competing listing has to justify.

Based on July 2026 data, this shortlist surfaces the two kinds of ASIN worth keeping an eye on — the ones that just broke into the Top 10, and the ones growing fastest month over month. Specifically, one ASIN forced its way in: B00IHVHM4Q booked 10K units at $16.98, with ▲ 0.0% MoM change. On the growth side, B0FTD6SQQN leads positive momentum with ▲ 150.0% MoM growth on 5K units, with B0GRD63RJZ close behind at ▲ 100.0% MoM on 10K units.

The two signals carry different weight. A fresh entrant means share has already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date. A steep growth rate works as the earlier warning: it marks demand that is still compounding, usually a month or two before the ranking catches up to it.