Plum Tree Business Group
Built around what matters.
We believe technology can make more room for real life. Our role is to find useful ideas, give them the right structure, and help them grow into products people return to.
Small everyday joys. Room to grow.
Useful products.
Brighter days.
We build and back software, activities, and products that bring a little more ease, play, and togetherness to family life.
01 / Our approach
A little care.
A lot of good.
We develop our own products and help promising ideas take root. From creative keepsakes to playful digital worlds, we look for things that earn a place in everyday life.
Our growing family
Many branches.
One point of view.
Creative keepsakes, little game worlds, and engineering-informed ideas. Meet the products we make and the concepts we are exploring.
Product Families
Explore the familiesColoring books & keepsakes
Once Upon a Line
Personalized coloring books turn family photos into pages to color and keep. Themed books make it easy to start with a little everyday creativity.
Meet Once Upon a LineIndependent games
Butterbug Games
An independent game studio creating playful worlds, from thoughtful puzzles to cozy gardens, with a soft spot for curiosity and discovery.
Meet Butterbug GamesEngineering-informed product design
Ekistica
Engineering-informed product design across clean-energy infrastructure, industrial software, and everyday goods. Concepts are tested against physics, cost, and real demand before they move onto a roadmap.
Meet Ekistica
For founders, partners, and good ideas