SUMMARY
Solo founders are becoming increasingly common, particularly as AI tools make it easier for one person to build software and launch a company. But building a technology company requires far more than creating a product. Research has found advantages for some multi-founder teams, while other studies have found solo founders can perform just as well or even outperform teams in certain settings. The real issue is not simply the number of founders, but whether the company has enough complementary skills, decision-making capacity, resilience and access to networks.
STARTUPS & TECHNOLOGY — The image of the lone founder building a billion-dollar technology company from a laptop has become increasingly attractive.
Artificial intelligence has made that image even more believable.
Today, one person can use AI coding assistants, design tools, cloud infrastructure and automated marketing systems to accomplish work that once required an entire technical team.
But there is a dangerous assumption hidden inside that trend: if one person can build the product, one person can necessarily build the company.
Those are two very different problems.
Solo founders can absolutely build successful technology companies. Research is not unanimous that founding teams are always superior. One study of crowdfunded ventures found that solo-founded companies could outperform teams across several outcomes, while other research has found significant advantages for multi-founder companies.
The more useful question is therefore not whether solo founders are doomed.
It is why operating alone can create structural weaknesses that become increasingly difficult to manage as a technology startup grows.
Solo Founders Are Becoming More Common
The trend itself is unmistakable.
Carta's analysis of more than 40,000 U.S. startups found that the share of new companies with solo founders increased from 23.7% in 2019 to 36.3% in the first half of 2025.
AI is helping accelerate that shift.
A founder who previously needed a developer to build an early product can now use AI-assisted coding tools. Design, research, content production, customer support and even parts of marketing can also be automated.
This lowers the cost of starting a company.
But lowering the cost of starting a startup does not eliminate the difficulty of scaling one.
1. One Person Cannot Be Excellent at Everything
The first problem is brutally simple: technology companies require multiple types of expertise.
A founder may be an exceptional engineer but a weak salesperson.
Another may understand marketing but struggle with product architecture.
Someone else might be excellent at product design but inexperienced in finance, hiring or enterprise negotiations.
A founding team can distribute these responsibilities.
A solo founder has to either develop those capabilities personally, hire people to fill the gaps or outsource them.
AI can reduce the amount of work required, but it does not magically give one person decades of experience across every business function.
This becomes particularly important once a startup moves beyond its initial product.
Building version one may be primarily an engineering challenge.
Building a company with hundreds of customers is simultaneously a product, sales, marketing, hiring, finance, legal, infrastructure and leadership challenge.
2. Decision-Making Becomes a Single-Point-of-Failure Problem
Solo founders have one enormous advantage: they can make decisions quickly.
There is no co-founder meeting.
No argument over product direction.
No disagreement about pricing.
No need to convince another founder before changing strategy.
But the same advantage can become a weakness.
When there is only one person making major decisions, there is nobody with equal authority to challenge bad assumptions.
A founder can become deeply attached to a product that customers do not actually want.
They can misread the market, underestimate a competitor or spend months solving the wrong problem.
A strong co-founder can act as an internal opposition system.
That does not guarantee good decisions, but it creates friction against catastrophic ones.
3. The Workload Can Become Unsustainable
Startup founders already work under enormous pressure.
For a solo founder, the pressure can become concentrated in one person.
The same individual may be responsible for writing code in the morning, answering customers in the afternoon, pitching investors in the evening and dealing with technical failures at night.
AI can automate parts of those tasks, but automation does not eliminate responsibility.
Someone still has to decide what matters, review outputs, manage priorities and take responsibility when something goes wrong.
This becomes particularly dangerous during periods of rapid growth.
A company can survive a founder working at an extreme pace for a few months.
It is much harder to build a durable company around an operating model that requires one person to function at maximum capacity indefinitely.
4. Fundraising and Networks Can Be More Difficult
Capital is not the only thing investors provide.
Networks matter.
Introductions to customers, employees, partners, investors and industry experts can accelerate a startup dramatically.
Founding teams can sometimes bring broader networks because several people contribute their relationships and professional histories.
Research on startup funding also suggests that founding-team size can influence fundraising outcomes. A 2025 study of Y Combinator companies found that larger founding teams tended to raise more capital, although the researchers emphasized that other factors such as industry and product innovation remain important.
There is also a structural funding disadvantage for solo founders.
Carta found that solo-led companies represented about 30% of startups founded in 2024 but received only 14.7% of cash raised in priced equity rounds that year.
That does not prove that investors are right to prefer teams.
It demonstrates that the fundraising environment can be harder for solo founders.
5. Scaling Requires More Than the Founder
The biggest mistake is confusing the ability to launch a startup with the ability to scale it.
At the beginning, the founder can personally control almost everything.
There may be ten customers.
There may be one product.
There may be no employees.
The founder can make nearly every decision.
But imagine the company reaches 10,000 customers.
Now there are customer-support problems, infrastructure requirements, security concerns, sales operations, accounting, hiring, compliance and product-development priorities.
The founder becomes a bottleneck.
At that point, the question is no longer “Can this person build the company?”
It becomes “Can this organization operate without every important decision passing through one person?”
AI Changes the Equation — But Not Completely
This is where the current startup environment is different from previous generations.
AI has dramatically increased what a single technically capable founder can accomplish.
Modern AI tools can assist with coding, debugging, research, documentation, customer support, marketing and data analysis.
That means some historical arguments against solo founders are becoming weaker.
A founder who previously needed five employees to build an early product may now accomplish much of that work with software.
But AI primarily increases execution capacity.
It does not automatically provide judgment.
It does not take responsibility for the company's strategy.
It does not guarantee customer demand.
And it does not necessarily replace human relationships.
That distinction matters enormously.
The Strongest Case for Solo Founders
There is another side to the argument that should not be ignored.
Solo founders can be exceptionally fast.
They do not need consensus.
They retain complete control.
They can pivot immediately.
They also avoid the serious problem of co-founder conflict.
Research has challenged the assumption that teams are automatically superior. A study published in the Strategic Management Journal found that solo ventures can outperform founding teams in certain settings, showing that the relationship between founder count and success is more complicated than the conventional startup narrative suggests.
In other words, adding a co-founder simply because “startups need two founders” can be a terrible decision.
The wrong co-founder can be worse than no co-founder.
The Real Advantage Is Complementarity
This is the point founders should focus on.
The objective should not be to maximize the number of founders.
It should be to maximize complementary capability.
A technical founder who can also sell, recruit and understand customers may have little need for a co-founder.
But a technical founder who hates sales and has no understanding of distribution may eventually need someone who excels in those areas.
The same principle works in reverse.
A business-oriented founder may need a technical partner who can own product architecture and engineering decisions.
The value comes from filling critical gaps.
When Going Solo Makes Sense
Building alone can be rational when the founder:
- Has strong technical and business capabilities.
- Can make decisions without becoming isolated.
- Has access to experienced advisors and mentors.
- Can outsource specialized work efficiently.
- Uses AI and automation intelligently.
- Has enough financial runway to survive mistakes.
- Can recruit strong employees when the company reaches the next stage.
In those circumstances, adding another founder may create unnecessary complexity.
When a Co-Founder Becomes Valuable
A co-founder becomes more attractive when the founder faces a capability gap that is central to the company's success.
If the startup is fundamentally technical but the founder cannot build the technology, that is a serious problem.
If the product is excellent but nobody can sell it, that is also a serious problem.
If the business depends on enterprise relationships and the founder has no network in the target industry, another experienced leader could dramatically change the company's trajectory.
The right co-founder is not another pair of hands.
The right co-founder changes what the company is capable of doing.
The Biggest Mistake: Choosing a Co-Founder for Emotional Comfort
There is one reason to avoid choosing a co-founder: loneliness.
Starting a company is difficult, and founders naturally want someone beside them.
But friendship is not the same as complementary capability.
A friend who shares your interests may be a terrible business partner.
Before giving someone a substantial ownership stake, founders should examine whether that person adds capabilities, judgment, networks and resilience that the business genuinely needs.
What Investors Should Actually Evaluate
Investors who automatically reject solo founders may be missing valuable companies.
The founder count is only one variable.
More important questions include:
- Can the founder build the product?
- Do customers actually want it?
- Can the founder sell?
- Does the founder understand the market?
- Can the company recruit talent?
- Does the founder have strong external networks?
- Can the founder accept criticism?
- Can the founder delegate?
- Can the company scale beyond the founder?
Those questions provide much more information than simply asking whether there are one or two names on the founding documents.
The Future Could Be More Solo
The rise of AI suggests that solo entrepreneurship may become significantly more viable.
Modern software can effectively multiply the output of a highly capable founder.
That could lead to a new category of companies with extremely small teams and very high revenue.
Recent reporting has already highlighted startups and entrepreneurs using AI to operate businesses with unusually small workforces.
But there is an important distinction between a company being lean and a company being dependent on one person.
The first can be a competitive advantage.
The second can become a vulnerability.
The Five Risks in One View
| Risk | Why It Matters |
|---|---|
| Skill gaps | One founder rarely excels at every critical function. |
| Decision isolation | Bad assumptions can go unchallenged. |
| Founder overload | Too much responsibility can create a bottleneck. |
| Smaller networks | Fewer built-in relationships can make fundraising and hiring harder. |
| Scaling dependency | The company can become dependent on one person's decisions and availability. |
Conclusion
Solo-founded technology companies are not inherently destined to fail.
In fact, the evidence is much more complicated than the popular startup narrative suggests. Some research finds meaningful advantages for founding teams, while other research finds solo founders can outperform teams under certain conditions.
The real danger is building a company that has one founder but only one source of capability.
A founder can solve that problem without necessarily giving away half the company.
They can hire exceptional employees, build an advisory network, develop strong relationships with investors and customers, use AI to multiply productivity and deliberately surround themselves with people who challenge their thinking.
But if a startup's success depends on capabilities that one founder simply does not possess, pretending otherwise is not independence.
It is risk.
The best startup structure is therefore not automatically solo or team-led. It is the structure that gives the company enough complementary talent, speed, accountability and resilience to survive the transition from an idea into a real organization.
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