Building a successful startup is not just about having a brilliant idea or working harder than everyone else. It is about identifying the right market, solving a problem customers are desperate to fix, and validating demand before investing time and money into building a product.
Serial entrepreneur and investor Michia Rohrssen, who built and sold his startup Prodigy for $110 million, has shared his approach to identifying profitable business opportunities and turning early-stage ideas into scalable companies.
Through his experience as a founder and now as an investor at L7V, Rohrssen believes that finding the right business idea requires a systematic process rather than relying on intuition, passion, or luck.
In his startup playbook, he explains how entrepreneurs can identify market opportunities, test business ideas, find paying customers, and build companies capable of achieving significant growth.
Start With Problems, Not Business Ideas
According to Rohrssen, most aspiring entrepreneurs make the mistake of searching for a perfect business idea from the beginning.
Instead, he recommends developing what he calls a “seed list” a collection of simple observations about problems across different industries.
These seeds are not complete business ideas. They are one-sentence descriptions of specific problems affecting consumers or businesses.
For example, customers often struggle to understand whether a car repair quote is reasonable, while dental clinics may spend considerable time following up on insurance claims.
Rohrssen suggests identifying these problems through everyday observations, industry discussions, online communities, and consulting reports.
He recommends paying particular attention to overlooked industries such as farming, veterinary clinics, and funeral services, where recurring operational problems could create opportunities for new businesses.
The goal is to build a habit of identifying problems every day and gradually develop a list of potential business opportunities.
Follow the Money to Identify Market Opportunities
Another important part of Rohrssen’s strategy is understanding where investors are putting their money.
During the early development of Prodigy, he noticed that startups were attracting significant investment by helping consumers purchase cars online and avoid traditional dealerships.
Rather than competing directly in the consumer market, he looked at the other side of the disruption.
If consumers increasingly purchased cars online, traditional dealerships would need new technology and services to adapt.
This observation helped him identify an opportunity to build software for car dealerships.
Rohrssen recommends studying funding announcements, startup databases, and venture capital activity to identify industries attracting investment.
He particularly suggests looking for clusters of at least three companies receiving funding in the same industry rather than relying on a single investment announcement.
He also recommends asking two important questions:
- What has changed in the market to attract investor interest?
- Who stands to lose if the newly funded companies succeed?
According to him, these questions can reveal overlooked problems and potential business opportunities.
Choose a Business That Matches Your Goals
Rohrssen challenges the conventional advice that entrepreneurs should always build businesses around their passions or existing expertise.
He explains that he had little experience working with car dealerships and was not particularly passionate about building dealership software when he started Prodigy.
Instead, he viewed the business as a vehicle to achieve his financial goals.
His recommendation is to first define what success looks like personally.
For some entrepreneurs, financial freedom might mean earning $10,000 per month. For others, the goal could be building a company worth hundreds of millions of dollars.
The type of business required to achieve these goals will be very different.
Entrepreneurs should consider their desired income, lifestyle, working arrangements, location flexibility, and long-term ambitions before choosing an idea.
The Three Tests Every Business Idea Must Pass
One of the central frameworks in Rohrssen’s playbook is his three-part evaluation system: Large, Early, and Desperate.
1. Large: Is the market big enough?
Entrepreneurs should evaluate the actual revenue opportunity rather than simply looking at the total amount of money spent in an industry.
Rohrssen recommends a bottom-up market-sizing approach: multiply the number of potential customers by the amount each customer could realistically pay annually.
For example, a business selling software to 100,000 customers at $1 per year has a potential market of just $100,000, regardless of how large the broader industry might be.
He suggests targeting markets worth more than $1 billion for high-growth businesses, with a larger opportunity for companies seeking venture capital.
2. Early: Is something changing in the market?
A good opportunity often emerges when an industry is undergoing a significant transformation.
This could be driven by changing consumer behaviour, technological developments, or new regulations.
Rohrssen recommends looking for measurable trends that indicate an existing problem is becoming more significant.
His experience with Prodigy demonstrated how growing consumer interest in purchasing cars online created an opportunity for businesses serving traditional dealerships.
3. Desperate: Do customers urgently need a solution?
Even a large and growing market can be a poor opportunity if customers are comfortable with their existing solutions.
Rohrssen highlights the importance of identifying customers who are genuinely frustrated and willing to pay to solve a problem.
He explains that entrepreneurs should investigate existing workarounds, the financial or operational costs of the problem, and whether customers are actively looking for alternatives.
A simple solution to an urgent problem can often outperform a sophisticated product addressing a minor inconvenience.
Validate Ideas Through Real Customer Conversations
Rohrssen believes that one of the biggest mistakes founders make is spending too much time researching and building products before speaking to potential customers.
He shares an example from Prodigy’s early development when his team began building a central marketplace for dealership vehicles.
However, their first conversations with dealerships revealed that the proposed business model could violate existing bird-dog laws.
The discovery forced them to abandon the idea before investing further resources.
His lesson is that a single conversation with the right industry expert can reveal information that weeks of online research might miss.
He recommends asking potential customers about their daily responsibilities, existing frustrations, current solutions, and the financial or operational impact of their problems.
Most importantly, founders should understand what customers would actually pay to solve the problem.
Simply asking whether someone would use a free product is not enough to establish demand.
Use AI to Test Multiple Business Ideas Faster
Rohrssen also highlights how artificial intelligence has changed the process of validating startup ideas.
Tasks that previously required significant manual effort, including writing emails, creating advertisements, researching potential customers, and conducting outreach, can now be accelerated using AI tools.
He recommends selecting three to five promising business ideas and conducting approximately 10 customer conversations for each.
For business-to-business opportunities, founders can reach out to industry professionals through targeted cold emails.
For consumer-focused businesses, they can create useful guides or other lead magnets and promote them through social media advertisements to attract potential customers.
After conducting these tests, entrepreneurs should compare how many people genuinely experience the problem and are interested in finding a solution.
His suggested benchmark is to eliminate ideas where fewer than 50% of the people interviewed report experiencing the problem significantly.
This approach helps founders focus on the strongest opportunity instead of becoming emotionally attached to their first idea.
Sell Before Building: The Black Car Strategy
Another major lesson from Rohrssen’s entrepreneurial journey is the importance of selling before building.
He reveals that Prodigy secured approximately $500,000 in software orders before writing a single line of code.
His philosophy is to avoid building complicated products with numerous features before establishing that customers are willing to pay.
He calls this approach the “Black Car” strategy, inspired by Henry Ford’s Model T, which was famously associated with the idea that customers could have any colour as long as it was black.
For startups, the principle is simple: build one product that solves one specific problem for one clearly defined customer.
Once customers repeatedly purchase and use that product, founders can gradually improve it based on feedback.
Rohrssen also recommends creating a customer advisory board consisting of five to 10 early customers who receive direct access to the team and preferential pricing in exchange for feedback.
This helps founders secure early customer relationships while refining their products.
Scale Vertically First, Then Horizontally
Once a business has found a product that sells consistently, Rohrssen recommends following a two-stage growth strategy.
Vertical scaling: Focus on one specific customer segment and optimise every part of the sales funnel.
This includes improving advertising, landing pages, offers, messaging, and checkout processes to increase conversions.
Horizontal scaling: Once growth begins slowing within the initial customer segment, take the proven sales funnel and adapt it for another closely related audience.
For example, a language-learning application initially targeting people travelling to Japan could expand to anime fans, Japanese role-playing game enthusiasts, and students learning Japanese.
Rather than building a completely new product for every audience, entrepreneurs can reuse the same underlying system while adjusting the messaging and offers.
Rohrssen believes AI makes this process significantly easier by allowing businesses to create and test multiple customer-specific campaigns quickly.
The Bigger Lesson: Find the Right Market Before Building
Michia Rohrssen’s startup philosophy ultimately comes down to identifying a large market, recognising changes that create new opportunities, and finding customers who urgently need a solution.
His experience building Prodigy demonstrates why founders should remain flexible, test assumptions early, and avoid spending too much time developing products without proven demand.
For aspiring entrepreneurs, his message is clear: success does not necessarily begin with a revolutionary idea. It begins with finding a valuable problem, understanding the market, and proving that people are willing to pay for a solution.
As AI continues to reduce the time and resources required to research, build, and market products, the ability to identify the right opportunity and validate it quickly could become an increasingly important competitive advantage.