Tandem Coffee Roasters

Tandem Coffee Roasters was founded in 2012 in Portland, Maine, by Will and Kathleen Pratt, who had worked in coffee in Boston, Martha’s Vineyard, San Francisco and New York. The roastery and cafe sit in a 1930s brick building on Anderson Street in East Bayside, and a second Coffee + Bakery opened on Congress Street in the West End in 2014 with baker Briana Holt. Tandem roasts in-house and offers a rotating list of single origins alongside seasonal blends, including its signature Time and Temperature espresso. It sources at origin through small growers and specialty importers and buys Cup of Excellence lots, such as a 2026 Honduras CoE Gesha. Roast-to-order shipping and a menu that mixes everyday espresso with competition lots make it a solid roaster to explore at home.