Grow your mind, grow your garden.
Learn it, teach it back, work it out on the page, then test yourself. Every prompt removes more carbon than it emits.
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A list of subjects Bonsai can be used for.
Bonsai helps students break a problem down step by step, with guided explanations, an interactive notebook, and a quiz at the end. Bonsai promotes real learning, not answers to copy down.
One page, three ways to explore a topic. Learn builds understanding and walks students through problems. Explain switches the roles — you teach it. Discuss strengthens your claims through the Socratic method.
How Learn worksWhat's the difference between mitosis and meiosis?
Both divide a cell, but for different jobs. Mitosis copies everything and splits once, giving two identical cells — that is growth and repair. Meiosis splits twice without a second copy, giving four gametes, each with half the chromosomes and each genetically different.
Before we go on: a human body cell has 46 chromosomes. How many does each gamete end up with?
Notebook lets students work through problems in an interactive environment and get guiding hints when they need help. It reads your work and collaborates with you when you need it.
How Notebook worksDivide both sides by −2. What does that do to the sign?
Name a topic, or give Bonsai your own notes. Personalise your quiz and get instant feedback after you finish.
How Quiz worksWhich process converts light energy into chemical energy in plants?You put: Photosynthesis
Chlorophyll absorbs mostly green light.You put: True
Chlorophyll reflects green — which is exactly why leaves look green to you. What it absorbs is red and blue.
Name the gas a plant takes in during photosynthesis.You put: carbon dioxide
A new tree each month. As you study with Bonsai, your tree grows. Past trees stay in your collection — a year of studying, kept as a year of trees.
The tree resets on the first of the month and starts again from a seedling. Nothing is lost — last month's is filed in your collection, at exactly the size your studying got it to.
Mainstream chatbots burn fossil-heavy compute with every prompt. Bonsai runs on renewable power and funds verified carbon removal every time you prompt — 2× the carbon your usage emits on the free plan, about 10× on Pro, measured from real token and prompt use.
the carbon your usage emits, removed on Pro
the carbon your usage emits, removed on the free plan
renewable-powered compute, in European data centres
Every prompt spins up fossil-fuelled data centres at huge scale — adding emissions while nearby communities shoulder the burden.
Bonsai uses European data centres on renewable energy — not the fossil-heavy stack behind most LLMs. The default model is a deliberately light one.
Every prompt funds carbon removal — 2× what it emitted on the free plan, about 10× on Pro — so studying pushes the planet forward instead of back.
Impact figures are averages. The full methodology — every constant, its source, and how it was measured — is public.
Learn, Notebook, Quiz and your garden are all free, for as long as you want them. Pro is $5 a month — about the price of a coffee — for higher limits, our most capable model, and 10× your carbon removed instead of 2×.
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