Ask
Ryan Levesque
Levesque's survey-based method for online businesses: ask your audience open questions, find the groups hidden in the answers, then sell to each group in its own words.
First published 20157 books in this topic
Customer Validation Books: Test Your Startup Idea Before You Build
Customer validation books teach the skill that saves founders the most money: finding out whether people want your product before you spend months building it. They cover how to run interviews that produce honest answers, how to design cheap experiments and how to read the evidence without fooling yourself.
Start with The Mom Test for conversations, then move to Testing Business Ideas or The Right It once you are ready to run experiments with real money or sign-ups on the line.
The oldest book here is The Mom Test (2013); the newest is Startup Idea Validation the Right Way (2025).
The Mom Test
Rob Fitzpatrick
A short, practical guide to customer conversations. Fitzpatrick shows why polite people give you useless praise and how to ask about their past behaviour instead.
First published 2013The Right It
Alberto Savoia
Former Google engineering director Alberto Savoia argues that most new ideas fail because nobody wants them, and shows how quick fake versions, which he calls pretotypes, reveal demand before you build.
First published 2019Startup Idea Validation the Right Way
Violetta Bonenkamp
A free, hands-on e-book for bootstrapped founders: test demand before you build, track the few numbers that matter, use AI tools for fast prototypes and grow from first customers without giving up equity.
First published 2025Talking to Humans
Giff Constable
A pocket-sized guide to customer discovery. Constable opens with a story of two first-time founders, then shows how to pick, find and interview the right people and turn notes into decisions.
First published 2014Testing Business Ideas
David J. Bland and Alexander Osterwalder
A visual field guide to experiments. Bland and Osterwalder show how to find the riskiest assumptions in a business idea and choose from a library of tests, sorted by cost, speed and strength of evidence.
First published 2019Will It Fly?
Pat Flynn
Pat Flynn's step-by-step guide to testing a business idea: check that it fits the life you want, map the market, talk to customers and ask for money on a small scale before you build.
First published 2016Free Fe/male Switch tools for this topic
- Idea ValidatorFree F/MS tool to score your idea
- Market Size CalculatorFree F/MS tool
- 100 startup idea validation SOPsStep-by-step validation procedures
- F/MS Startup GameValidate an idea with an AI co-founder
- Customer discovery SOPsStep-by-step guide on a sister F/MS directory
- Startup methods to validate demandStep-by-step guide on a sister F/MS directory
Other startup book topics
Startup methodsLean Startup, customer development, design sprints and business model tools.StrategyWhere to compete, how to win and how platforms and monopolies work.Disruption and technologyDisruption theory, AI-era companies, DevOps and creative confidence.Founder storiesMemoirs and histories that show what building a company feels like.Leadership and managementHiring, goals, culture and leading a team through hard calls.Mindset and habitsHabits, decision-making, resilience and designing a working life.Money and fundingCash flow, term sheets, investors and selling your company.Marketing and salesPositioning, messaging, word of mouth and building a sales process.Product and growthProduct discovery, habit-forming products, traction channels and scaling.Women and inclusive foundersAdvice, stories and money talk for women and underrepresented founders.Business skillsHow a business works, negotiation, persuasion and startup ecosystems.
Or browse the full directory of 100 startup books.