Bringing People Together,
One Coffee at a Time.
Our Story
At Piecewise Coffee, we believe coffee is more than just a drink—it’s a bridge that brings people together. Since its start in 2019, Piecewise Coffee has evolved from a charming local coffee shop into a growing hub for community, connections, and creativity.
In 2022, brothers Jacob and Zach Kirby purchased the original Cayce location with a vision: to create a space where life happens—where businesses are born, friendships flourish, and stories begin. For them, Piecewise isn’t just about coffee; it’s about making where we are what we want it to be.
“Coffee is a great tool to help people build meaningful connections. Whether it’s your first date, a study session, or a business meeting, Piecewise is where stories start.”
– Jacob Kirby, Co-owner
The Meaning Behind Piecewise
Piecewise is a term from calculus—a function that connects unrelated data points to form something cohesive. Originally named by the first owners (an aerospace scientist, no less), it perfectly reflects what we strive to do: create common ground among uncommon people.
Here, locals and newcomers alike can feel at home, as part of a larger story. Whether you’re a student, a young entrepreneur, or just someone looking for a welcoming space, Piecewise is for you.
Our Locations | Cayce & Columbia
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Downtown Columbia
Our Partnerships
Locally Sourced. Locally Served. Locally Driven.
Everything at Piecewise Coffee is intentionally local–from the coffee beans to the baked goods sourced from a baker just down the block. As locals who live, work, and invest in this community, the Kirby brothers are passionate about supporting local businesses and fellow entrepreneurs who share their commitment to quality and craftsmanship.
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At Piecewise Coffee, we value connection, quality, and community—values that the Greenville-based roaster Junto Coffee embodies in every roast. Their commitment to ethical sourcing and thoughtful craftsmanship aligns perfectly with our mission, making them a natural fit for our purveyor lineup. We’re excited to share their exceptional coffee with you.
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We’re proud to serve Methodical Coffee, Greenville-based local coffee roasters known for sourcing exceptional beans and roasting them with care. Together, we co-created an exclusive Piecewise Blend - The Daily Driver—a smooth, balanced roast you can’t find anywhere else. This collaboration reflects our shared commitment to crafting coffee experiences that are as intentional as they are delicious, ensuring every sip tells a local story
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From buttery pastries to indulgent sweets, JJ’s Place delivers quality and care with every treat—straight from their ovens to our shelves. By partnering with other local companies like JJ’s we’re able to uplift talented local bakers and bring fresh, handmade goods to our community.
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We value connection, quality, and community—principles that Rishi Tea brings to life in every cup. Their dedication to direct sourcing, organic ingredients, and artisanal blending aligns seamlessly with our mission. We’re proud to offer their thoughtfully crafted teas as part of our purveyor lineup and excited to share them with you.
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What started with a barista behind the Piecewise counter grew into a creative collaboration we’re incredibly proud of. Former barista, Katherine Frehse, has played a vital role in shaping the Piecewise brand. From logos and printed materials to our website and marketing design, Katherine and her team bring the creativity and care that makes our story stand out.
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We’re proud to partner with Della & Chris of Something Small Catering as our recommended vendor for events at our Mail Room Venue. Something Small Catering is a unique, small service catering company in Columbia, SC that caters to your BIG events, but small guest lists. They believe that every client and every event is unique and work to curate a menu experience that reflects just that.