Starbucks used the Circadia brand for eateries it opened in California’s San Francisco Bay Area in 1999.
The experiment was an attempt to move beyond Starbucks’ familiar coffeehouse model and explore a broader restaurant-style format. Circadia locations were associated with a more substantial food-and-meal experience than a typical Starbucks café. Starbucks also converted its Seattle Circadia restaurant into a Café Starbucks during the same period.
The name is easy to confuse with Starbucks-owned or Starbucks-associated product brands. Ethos is a bottled-water brand, Teavana is a tea business acquired much later, and Princi is an Italian bakery concept that Starbucks invested in during the 2010s. None of those names answers this 1999 Bay Area question.
Circadia did not become a major long-term Starbucks chain. Its importance is mainly historical: it shows Starbucks testing concepts and formats before concentrating more strongly on its core coffeehouse identity.