Start-Up Library

Start-Up Library is a small set of focused, interactive tools for founders and small teams who want to think clearly without drowning in features.

What's in the library

• Business Model Canvas — the original 9-box canvas for sketching how a business creates and captures value.
• Lean Canvas — Ash Maurya's startup-leaning variant, sharper on problem and solution than on partners and costs.
• Value Proposition Canvas — Strategyzer's zoom-in on the fit between what customers actually need and what you're offering.
• Startup Growth Calculator — a hands-on monthly projection model with ARPU, CAC, churn, scenarios, scheduled events, and goal-seek.

The approach

Every tool works without an account so you can try the thinking before committing. Sign in if you want to save your work, switch between canvases, and revisit them later. Your content stays yours — we don't sell data and we don't use behavioural tracking.

Who's behind it

Start-Up Library is built and maintained by one founder in the UK. Feedback, bug reports, and tool requests are very welcome — drop a note any time.