Category: Blog

  • Minimum Viable Product: How Startups Build Products Customers Want

    Minimum Viable Product: How Startups Build Products Customers Want

    Minimum Viable Product: How Startups Build Products Customers Want

    James Church

    WRITEN BY

    James Church

    Author, Investable Entrepreneur

    James is an award-winning business advisor and best-selling author. His clients have raised over £200m in early-stage funding. 

    You have a great startup idea. But how do you know customers will actually want it?

    Building a complete product before answering that question can cost a startup months of development time, significant money, and valuable resources. This is where a minimum viable product (MVP) can help.

    A minimum viable product is the simplest version of a product that solves a real customer problem while allowing a startup to test demand, collect feedback, and learn before investing heavily in development.

    Instead of spending months trying to build a perfect product, founders can launch a focused version, put it in front of real customers, and use their response to decide what to improve next.

    For startups, this creates a practical path from an idea to product validation, development, and growth.

    The real value of an MVP is not simply building something faster. It is reducing uncertainty. Customer feedback, usage data, retention, conversions, and willingness to pay can help founders understand whether they are solving the right problem for the right audience.

    This is particularly important when resources are limited and every development decision matters.

    In this guide, we explore what a minimum viable product is, how to build an MVP, how to validate it with real customers, what to measure after launch, common MVP mistakes, and when a startup should move beyond the MVP stage.

    The goal is simple: spend less time guessing and more time building products that customers actually want.

    Why Should Startups Validate Their Ideas Before Building Everything?

    Launching a product without understanding customer demand can be expensive and risky. Validating an idea before full development allows founders to test assumptions, reduce unnecessary spending, and identify potential improvements before investing significant time and resources.

    Early validation can help startups achieve:

    • Lower development costs
    • Faster learning
    • Better customer understanding
    • Reduced product risk
    • More focused product development
    • More efficient resource allocation
    • Better evidence for future business decisions
    • Stronger preparation for investor conversations

    Validation is particularly valuable for early-stage companies because founders often have limited resources and many assumptions to test.

    Instead of relying entirely on forecasts, an MVP allows entrepreneurs to collect evidence from real customers.

    For founders considering the wider investment journey, customer validation can also provide useful evidence when communicating a business opportunity to potential investors.

    How Does Customer Feedback Help Build Better Products?

    Customer feedback provides insights that can guide product development. Every interaction with users can help founders understand expectations, identify problems, and prioritise improvements.

    Instead of relying only on internal opinions, startups can gather feedback through:

    • Customer interviews
    • Surveys
    • Product testing
    • Usability sessions
    • Support conversations
    • Reviews
    • Usage analytics
    • Early-access programmes

    These insights can reveal how customers actually use a product and where improvements may create the greatest value.

    There is also an important difference between what customers say and what they do. A person saying that an idea sounds useful can be an early signal, but signing up, using the product repeatedly, recommending it, or paying for it provides stronger evidence of demand.

    This is why customer behaviour should be considered alongside direct feedback when evaluating an MVP.

    What Is a Minimum Viable Product?

    A minimum viable product (MVP) is the simplest version of a product that provides its core value while allowing a startup to test assumptions and learn from real customers.

    In simple terms, an MVP helps answer an important question:

    Will customers actually use and value this product?

    The objective is not to create a perfect or fully developed product. Instead, an MVP should provide enough functionality to solve the core customer problem and generate useful feedback.

    An effective MVP should:

    • Solve a clearly defined customer problem
    • Deliver the product’s core value
    • Include only essential functionality
    • Be practical enough for customers to use
    • Generate meaningful feedback and data

    This makes MVP development particularly useful for early-stage startups that need to learn quickly while making careful use of limited resources.

    How Do You Build a Minimum Viable Product?

    Building an MVP starts with identifying the most important problem your target customer needs to solve.

    Founders should avoid trying to include every possible feature in the first version. The objective is to test the most important assumption with the smallest useful product.

    A practical MVP development process can look like this:

    1. Identify the Problem

    Define the specific problem your product is designed to solve. Make sure the problem is clear and relevant to your target customers.

    2. Understand Your Customers

    Research who experiences the problem, what they currently do to solve it, and what challenges they face.

    3. Define the Core Value

    Decide what your product must do well. Focus on the main benefit customers should receive from using the product.

    4. Prioritise Essential Features

    List the features you think customers need and identify which ones are essential for solving the core problem. Leave additional features for later development.

    5. Build the MVP

    Create the simplest useful version of the product that allows customers to experience its main value.

    6. Test With Real Customers

    Put the MVP in front of real users and collect feedback. Pay attention to both what customers say and how they actually use the product.

    7. Measure the Results

    Track relevant metrics such as engagement, retention, conversions, purchases, and customer feedback.

    8. Improve the Product

    Use the information collected during testing to decide what should be improved, changed, removed, or developed next.

    The purpose is not simply to build something quickly. It is to learn quickly.

    Founders should resist the temptation to add every feature they can think of. Additional functionality can be introduced later when customer behaviour shows that it provides genuine value.

    Why Is Early Product Testing Important?

    Testing a product before investing heavily in development can reduce uncertainty and help businesses understand whether their solution addresses a genuine customer problem.

    Early testing can provide measurable information about:

    • Customer interest
    • Product usability
    • Engagement
    • Retention
    • Conversion
    • Willingness to pay
    • Customer satisfaction

    Many entrepreneurs searching for what is a minimum viable product are ultimately trying to answer a bigger question: Will customers actually want this product?

    By introducing a simplified version of a product, founders can measure customer interest and refine their solution based on real-world evidence rather than assumptions.

    Startups that validate ideas early may also have stronger evidence to use when preparing for future investment conversations.

    How Do You Validate an MVP With Real Customers?

    MVP validation means testing whether real customers find enough value in a product to use it, return to it, recommend it, or pay for it.

    Founders can validate an MVP through:

    • Customer interviews
    • Surveys and feedback forms
    • Product demonstrations
    • Landing page testing
    • Usability testing
    • Early-access programmes
    • Free or paid trials
    • Usage analytics
    • Customer retention
    • Repeat purchases
    • Conversion tracking

    The strongest validation usually comes from observing customer behaviour rather than relying only on opinions.

    For example, someone saying that a product sounds useful provides an initial signal. A customer who signs up, uses the product repeatedly, recommends it, or pays for it provides stronger evidence that the product is solving a meaningful problem.

    The goal of MVP validation is to identify patterns that can guide the next stage of development.

    What Is the Difference Between an MVP and a Prototype?

    An MVP and a prototype can both be used during the early stages of product development, but they have different purposes.

    A prototype is generally created to demonstrate or test an idea, design, workflow, or feature. It may not be fully functional and is often used before a product is ready for real-world use.

    An MVP, on the other hand, is designed to provide enough value for real customers to use the product while allowing the startup to learn from their behaviour and feedback.

    For example, a clickable prototype may demonstrate how an app could work, while an MVP might allow a limited group of customers to actually use its core functionality.

    How Can Founders Turn Customer Insights Into Business Growth?

    Collecting feedback is only the beginning. Successful startups need to analyse customer behaviour, identify recurring patterns, and use those insights to make informed improvements.

    Every product update should focus on solving genuine customer problems rather than adding unnecessary features.

    Businesses that continuously refine their products based on customer insights can respond more effectively to changing market needs.

    This process can also help founders allocate resources more efficiently while maintaining a clear product direction.

    Rather than making assumptions about future demand, entrepreneurs can use customer evidence to build products that are more closely aligned with actual customer needs.

    For founders planning future fundraising, demonstrating customer validation and traction can also help create a clearer business case for investors.

    Founders can learn more about communicating their business opportunity through the Investable Entrepreneur book.

    What Are the Most Common MVP Mistakes?

    Many startups struggle because they focus on creating a perfect product instead of learning what customers actually need.

    Delaying product testing can mean missing opportunities to identify problems early and make changes while they are still relatively simple and affordable.

    Common MVP mistakes include:

    • Building too many features
    • Ignoring customer feedback
    • Delaying product testing
    • Trying to satisfy every customer
    • Failing to define the target audience
    • Setting unrealistic development goals
    • Making decisions without reliable data
    • Measuring the wrong metrics
    • Scaling before product demand is understood

    Avoiding these mistakes allows startups to use their resources more efficiently while maintaining a clear focus on customer value.

    What Should Startups Measure After Launching an MVP?

    Once an MVP is in the hands of customers, founders need to understand whether it is actually delivering value.

    Useful metrics can include:

    • Sign-ups
    • Active users
    • Engagement
    • Customer retention
    • Conversion rates
    • Repeat purchases
    • Customer feedback
    • Revenue
    • Churn

    The right metrics depend on the business model and product.

    For some startups, customer retention may be more meaningful than the number of initial sign-ups. For others, repeat purchases or willingness to pay may provide stronger evidence of demand.

    The important thing is to measure behaviour that helps answer one central question:

    Are customers receiving enough value to continue using the product?

    When Should a Startup Move Beyond an MVP?

    There is no single point at which every startup should move beyond an MVP. The decision should depend on the evidence collected during testing.

    Useful signals can include:

    • Consistent customer demand
    • Strong customer retention
    • Repeat usage
    • Positive customer feedback
    • Willingness to pay
    • Increasing conversions
    • A clearly defined target market
    • A realistic opportunity to grow

    If the product shows consistent evidence of demand, founders can begin investing in additional features, infrastructure, marketing, and wider growth.

    If customers are not engaging with the MVP, however, more development is not always the answer.

    The business may need to revisit the customer problem, target audience, value proposition, or original assumptions before investing further.

    How Can an MVP Support Sustainable Startup Growth?

    An MVP is not the final destination. It is a way to learn before scaling.

    Once a startup understands what customers value, the information gathered during the MVP stage can guide:

    • Product development
    • Marketing
    • Pricing
    • Customer acquisition
    • Resource allocation
    • Future investment decisions

    Instead of adding features simply because they seem interesting, the business can prioritise improvements based on customer behaviour and measurable results.

    This creates a more evidence-based foundation for future growth.

    For founders preparing to raise capital, evidence from an MVP can also contribute to the fundraising story. Customer validation, early traction, usage data, revenue, and willingness to pay can help demonstrate how the business is progressing.

    Founders can also explore startup consulting and fundraising insights for additional guidance on building and growing a startup.

    Why Does Product Development Continue After Launch?

    Launching a product is only the beginning of the startup journey.

    Customer expectations change, competitors introduce new solutions, and markets continue to evolve. Businesses that stop improving their products may struggle to respond to these changes.

    This is one reason founders build an MVP before committing significant resources to advanced development. The MVP creates an opportunity to learn, adapt, and improve based on real customer behaviour.

    Continuous product development can help startups:

    • Respond to customer needs
    • Improve usability
    • Address recurring problems
    • Strengthen customer relationships
    • Identify new opportunities
    • Allocate development resources more effectively

    The objective is not to add features continuously. It is to make improvements that create meaningful value for customers.

    Looking Beyond Product Development

    Building a successful startup requires more than creating an innovative product.

    Founders also need to understand their customers, manage resources responsibly, develop a clear business model, and communicate their opportunity effectively.

    A strong product combined with customer validation and strategic planning can create a more informed foundation for future growth and investment discussions.

    Working with experienced advisors, learning from customer behaviour, and maintaining a long-term perspective can help founders navigate different stages of the entrepreneurial journey.

    For founders beginning to think about investor communication after validating their product, resources on investor pitch decks can help explain how product evidence and traction can fit into a wider fundraising story.

    Conclusion

    Successful startups are built through continuous learning, careful planning, and a commitment to solving real customer problems.

    Rather than aiming for perfection from day one, founders can test ideas early, gather customer feedback, and improve their products step by step.

    A minimum viable product provides a practical way to test customer demand before committing significant resources to full-scale development.

    The key is not simply to build faster. It is to build with a clear purpose, learn from real customers, and use evidence to guide future decisions.

    When founders understand what customers value, they can make more informed decisions about product development, investment, and growth.

    Frequently Asked Questions

    Why Is a Minimum Viable Product Important for Startups?

    A minimum viable product helps startups test ideas, gather customer feedback, understand demand, and improve a product before investing heavily in full-scale development.

    What Is a Minimum Viable Product?

    A minimum viable product is the simplest version of a product that delivers its core value while allowing a startup to test assumptions and learn from real customers.

    How Do You Build an MVP?

    To build an MVP, identify a clear customer problem, understand your target audience, define the core value, prioritise essential functionality, build a simple version, launch it to customers, and use the results to guide improvements.

    How Do You Validate an MVP?

    You can validate an MVP through customer interviews, surveys, product testing, landing pages, early-access programmes, usage analytics, retention, conversions, purchases, and other customer behaviour.

    What Should an MVP Include?

    An MVP should include the essential functionality required to solve the core customer problem and deliver meaningful value. Features that are not necessary for testing the main assumption can usually be added later.

    What Is the Difference Between an MVP and a Prototype?

    A prototype is generally used to test or demonstrate a concept, design, workflow, or feature. An MVP provides enough functionality for real customers to use a product while helping the startup validate demand.

    How Do You Know If an MVP Is Successful?

    Useful signals include customer retention, repeat usage, conversions, purchases, willingness to pay, engagement, and consistent positive feedback. The most relevant metrics depend on the product and business model.

    When Should a Startup Move Beyond an MVP?

    A startup can consider moving beyond an MVP when there is consistent evidence of customer demand, meaningful engagement or retention, willingness to pay, and a clear opportunity to develop the product further.

    Does an MVP Need to Be Perfect?

    No. An MVP is designed to help a startup learn. It should be useful enough to solve the core customer problem, but it does not need every feature planned for the final product.

    How Does MVP Validation Reduce Startup Risk?

    MVP validation helps founders understand whether customers value a solution before significant resources are committed to further development. This gives the business an opportunity to identify problems, test assumptions, and make changes earlier in the development process.



    About the Author

    James Church is an award-winning UK startup advisor, fundraising strategist, and author of Investable Entrepreneur. He has helped founders raise more than £200 million in investment by improving investor readiness, refining fundraising strategies, and developing compelling pitch decks.

    Through Investable Entrepreneur, James works with entrepreneurs to create investor presentations that communicate value clearly, strengthen fundraising confidence, and improve investment outcomes through practical, real-world expertise.

  • Stop Protecting Your Idea. Start Proving You Can Execute It.

    Stop Protecting Your Idea. Start Proving You Can Execute It.

    Stop Protecting Your Idea. Start Proving You Can Execute It.

    James Church

    WRITEN BY

    James Church

    Author, Investable Entrepreneur

    James is an award-winning business advisor and best-selling author. His clients have raised over £200m in early-stage funding. 

    Recently, a founder I know was accused of stealing an idea.

    The accusation came from another founder. Both are pre-launch. Both are pre-revenue. Neither has yet put their product in front of a meaningful market.

    What struck me wasn’t the accusation itself. It was how common this mindset has become among early-stage founders. Far too many people believe the idea is the valuable part.

    It isn’t.

    In fact, I would argue that 99% of founders have their thinking completely the wrong way around.

    The obsession with ownership misses the point

    Let’s start with an uncomfortable reality. Nobody really owns an idea.

    Ideas are constantly being shared, adapted, improved and combined. Most successful businesses are not built on entirely original concepts. They are built on different interpretations of existing problems.

    Two founders can look at the same opportunity and arrive at completely different businesses. They bring different experiences, different assumptions and different approaches to execution.

    Even if it were possible to fully “own” an idea, there is still a more important question.

    What is that ownership actually worth?

    The answer, in most cases, is very little. The startup world is full of people with brilliant ideas. Investors hear them every day. Customers hear them every day. Founders have them every day.

    The market does not reward people for having ideas. It rewards people for turning ideas into something useful.

    Investors don’t invest in ideas

    One of the biggest misconceptions I see is the belief that investors are searching for the most innovative idea in the room.

    They’re not. Instead, investors are trying to identify teams capable of building businesses.

    A founder may have a genuinely unique concept, but if they cannot attract customers, communicate value or build a repeatable route to growth, the idea itself has very little commercial value.

    On the other hand, a founder with a fairly ordinary concept can create a highly valuable company if they understand how to reach a market and solve a problem consistently.

    In practice, investors are often evaluating execution long before there is much evidence of it. They look for things like:

    • Can this founder attract attention?

    • Can they build momentum?

    • Can they convince people to care?

    • Can they create demand before the product is even finished?

    These signals tell investors far more than the originality of the idea ever could.

    The real challenge is distribution

    Founders often spend months worrying about competitors copying their idea. Meanwhile, they spend almost no time building an audience.

    This is a huge risk. A competitor can replicate features, copy positioning and can even build a similar product.

    But what’s much harder to copy is an engaged community that trusts you, follows your progress and wants you to succeed. This is why successful companies launch with waiting lists of thousands, while struggling startups launch into complete silence.

    Ultimately, success comes down to a founder’s ability to build a market before launch. Not how brilliantly unique their product is.

    Defensibility starts earlier than most founders think

    When founders talk about defensibility, they often jump straight to patents, intellectual property or legal protection. For most startups, those things are not the strongest defence. A market is.

    If I were starting a business tomorrow, my first priority would not be protecting the idea. My first priority would be proving there are people who care.

    That means:

    • Building an audience around the problem
    • Creating conversations with potential customers
    • Sharing progress publicly
    • Growing a waitlist
    • Testing messaging before launch
    • Establishing credibility within a specific community

     

    None of these activities feel as exciting as product development, but they are a huge amount more valuable. Because every conversation, every subscriber and every supporter increases the progress your idea makes along the path to a business with actual value.

    Build something people care about

    If you’re spending time worrying that somebody might steal your idea, I would encourage you to ask a different question. 

    What evidence do you have that people actually want it?

    Because once you have an audience, a waiting list, engaged customers and genuine market interest, your idea starts to have real value.

    Not because it’s unique, or protected. But because it’s got demand.

    And in business, proof has always been worth more than originality.

  • Best Startup Books for Founders: My Personal List

    Best Startup Books for Founders: My Personal List

    The best startup books for founders who want to raise investment

    James Church

    WRITEN BY

    James Church

    Author, Investable Entrepreneur

    James is an award-winning business advisor and best-selling author. His clients have raised over £200m in early-stage funding. 

    There are a lot of books about building startups. Most of them focus on product, culture, or mindset. Very few focus on the thing that determines whether a startup survives its early years: convincing investors to back it.

    I read widely. Over the years, I have worked through most of the books founders tend to recommend to each other. Some are genuinely useful. Some are interesting but impractical. And some get recommended far more than they deserve.

    This is my personal list of the best startup books for founders – the ones I actually think are worth your time, and more importantly, the ones that will have a direct impact on your ability to build and fund a business.

    I have included my own book, and I make no apology for that. It belongs on this list because of what it helps founders do, not because I wrote it.

    What makes a startup book actually worth reading?

    Most founders I work with are time-poor. They are building a product, talking to customers, managing a team, and trying to raise money, often simultaneously. A book that takes twenty hours to read and delivers one or two usable ideas is not a good investment of that time.

    The books on this list earn their place because they change how you think about something specific and important. Not generally. Not vaguely. Specifically. They give you a framework, a shift in perspective, or a tool you can apply immediately to your business.

    I have organised them roughly by the order I think most founders should read them – starting with the fundamentals of building something people actually want, and finishing with the books that will most directly help you raise the capital to scale it.

    My recommended reading list for startup founders

    01

    The Mom Test – Rob Fitzpatrick

    Most founders validate their ideas by asking people who care about them. Friends, family, and potential customers who do not want to hurt your feelings. The answers they get are polite and useless. This book teaches you how to have conversations that tell you the truth about whether your idea has legs. Every founder should read it before they build anything.

    02

    Zero to One – Peter Thiel

    Peter Thiel’s central argument is that real value comes from building something genuinely new, not competing in existing markets. It is a provocative read that forces you to interrogate whether your startup is truly different or just incrementally better. Investors ask this question about every business they see. This book helps you answer it.

    03

    The Lean Startup – Eric Ries

    Still essential, despite how often it gets cited. The core idea – build, measure, learn – sounds obvious until you realise how many founders skip the measure and learn parts entirely. For early-stage founders who are trying to find product-market fit without burning through their runway, this is the practical framework that helps you get there faster.

    04

    Crossing the Chasm – Geoffrey Moore

    A book about the gap between early adopters and mainstream customers, and why so many promising startups fail to bridge it. If you are preparing to scale and wondering why your growth has plateaued after a strong start, this book will explain exactly what is happening and what to do about it.

    05

    Traction – Gabriel Weinberg & Justin Mares

    Traction is the thing investors want most, and founders struggle most to demonstrate. This book is a systematic guide to finding the channels that work for your specific business, not a generic list of marketing tactics. It is one of the few books on growth that is genuinely practical rather than theoretical.

    06

    The Hard Thing About Hard Things – Ben Horowitz

    Most startup books focus on success. This one focuses on the brutal reality of building a company when things go wrong, which they always do. Horowitz writes about layoffs, co-founder conflicts, running out of money, and making decisions without enough information. It is honest in a way that very few business books are.

    07

    Venture Deals – Brad Feld & Jason Mendelson

    If you are raising venture capital, you need to understand term sheets, valuations, cap tables, and investor rights. Venture Deals explains all of it in plain language. Founders who have not read this book often walk into funding conversations without understanding what they are agreeing to. That is an expensive mistake.

    08

    Investable Entrepreneur – James Church

    I wrote this book because I kept seeing the same problem. Founders with strong businesses were failing to raise investment, not because their idea was weak, but because they could not communicate it in a way that made investors confident. The book introduces the Six Principles of the Perfect Pitch – the same methodology my clients have used to raise over £200m in early-stage funding. If you are preparing to raise, this is the book to read before you pitch a single investor. And you can get a copy for free.

    One more thing before you start pitching

    Reading widely is important. But knowledge without application does not raise investment.

    The founders who raise successfully are not always the most widely read. They are the ones who understand how investor-ready their business actually is right now, and who use that understanding to focus their preparation on the right things.

    Before you start pitching, I would recommend taking the two-minute investor readiness test. It is free, takes less than two minutes, and gives you an honest score of where your business currently stands against the criteria investors use to evaluate opportunities.

    At the end of the test, you will also get a free copy of Investable Entrepreneur – so you can start applying the Six Principles of the Perfect Pitch straight away.

    Free copy of investable entrepreneur - a book for startups

    Already read the book? Let’s build your pitch

    If you have read Investable Entrepreneur and want to go further, I work directly with founders to build the pitch that gets them funded. Every engagement starts with a conversation about where you are in your fundraising journey and what you need to move forward.

    Founders who work with me are 40 times more likely to raise successfully. If you are serious about your next round, let’s talk.

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