How to validate your idea and business model as quickly as possible

A book for aspiring entrepreneurs who are at the brink of launching a business around an innovative idea and are about to sink their life savings, corporate careers and most importantly, their valuable time.

Get the eBook (29€) Get it on iBooks (29€)

Available in PDF and ePub

What's inside?

Thanks to the Lean Startup movement there are so many methods, canvases, books and other tools that you’ll need to develop a skill to filter and select them. These are tools to design your business model, work out your idea in more detail, look for strong signals and gather enough evidence to execute on the idea and build a business.

I’ve collated and curated many available tools, blog posts and other resources in this book, which contains our selection of it and our view on when certain books, canvases and tools might come in handy. The book serves as a curated guide to other resources and helps you understand why you’d want to work in this way when you have an idea and you want to turn it into a business.

There’s no need to read this book cover-to-cover in order to make use of it. Feel free to pick out of this what you need. Each chapter comes with examples, tips and actions, which can put you on the right track and help you understand which tools, methods and canvasses you can you to get the answers you should be after.

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What you will learn

  • How to get practical on business modeling and lean startup
  • How to put your plans and strategy in action
  • How to create a pace and rhythm in your team
  • What options you have to get customer feedback quicker
  • How to build MVPs and experiments without code

Don't just take our word for it

“This book was really helpful and allowed me to get practical on Lean Startup. I was able to change my plans and get the right feedback of customers much sooner."

Rick Kuijf
Founder of
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“In this book, Robbert has done an excellent job collating and curating the best methods, tools and online resources to get entrepreneurs started on Lean Startup. This is a practical, hands-on guide for anyone looking for a crash-course in business experimenting.”

Dan Toma
Co-Author The Corporate Startup
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“This ebook is a pragmatic write-up for entrepreneurs who want to use Lean Startup to validate their ideas and find a working business model. It's full of actions and tips which help you get real results."

Diederik Dolk
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About the author

Robbert van Geldrop

Robbert van Geldrop is the Chief Venturing Officer of Firmhouse. He leads the venturing efforts of Firmhouse and has helped set up several ventures of this own, including Firmhouse Venture Lab.

Before joining Firmhouse, Robbert was running (since 2004) his own software company BackupAgent, which was acquired by Acronis in 2014. In the course of growing his company, Robbert also founded the first Lean Startup Circle meetup group in continental Europe.

Robbert has coached hundreds of entrepreneurs and innovation managers and has been involved in a dozen of accelerator programs in the past years, including Rockstart, YES!Delft and Utrecht Inc.

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