TL;DR
There is no correct answer to solo founder vs co-founder, and anyone who gives you one is describing their own company. The data cuts both ways: founding teams raise more and grow faster in venture portfolios; solo founders survive longer and reach revenue more often in broader samples; and co-founder conflict is the single most common cause of early failure in either. Roughly a third of new startups are now solo-founded, up from under a quarter a few years ago, mostly because one person can now get more built without a partner.
The decision comes down to six questions about you and the idea, not about statistics. What it usually reduces to is the last one: who builds the first version. A co-founder is one way to answer that, and it costs about half the company. The other ways cost money, and money is cheaper.
If you decide to go solo, the thing that makes it work is not being alone: it is getting the MVP built by people who are not on the cap table, and treating the co-founder question as something you can reopen once there is a product and users, when you will be choosing from a far better position.
What the data actually says
Most articles on this topic quote three statistics, and they contradict each other, so it is worth being precise about what each one measured.
Founding teams outperform in venture portfolios. First Round Capital’s ten-year review of its own investments found that companies with more than one founder outperformed solo-founded companies by 163 percent on its performance measure. Y Combinator’s founders have said for years that they prefer teams, and Paul Graham’s list of startup mistakes starts with “single founder”. This is real, and it describes a specific population: companies that got into top accelerators and venture portfolios in the first place.
Solo founders survive more often in broader samples. A 2018 study by Jason Greenberg and Ethan Mollick of several thousand crowdfunded ventures found that solo-founded companies were more likely to still be operating and more likely to be generating revenue than companies started by teams. This is also real, and it describes a different population: everyone who started something, not just those who raised.
Co-founder conflict is the leading cause of early failure. Noam Wasserman’s research at Harvard, published in The Founder’s Dilemmas, found that roughly two-thirds of high-potential startups fail because of conflict among the founders. That cuts against teams, and it is the number most often left out of “you need a co-founder” articles.
Solo founding is rising. Carta’s data on new companies formed on its platform shows solo founders at roughly a third of new startups in 2025, up from under a quarter in 2019. The reason is not that people stopped wanting partners. It is that one person can now get an MVP built, a landing page up and a first customer through the door with tools, contractors and agencies that did not exist or were not affordable a decade ago.
Put together: teams do better at the venture-backed end, where a company has to scale fast and the workload is beyond one person; solo founders do better at survival and reaching revenue, where a single decision-maker moves faster and there is nobody to fall out with. Neither number tells you what to do. They tell you what each path is optimised for.
What “investors prefer teams” actually means
Founders hear “VCs won’t fund solo founders” and treat it as a rule. It is a preference, and it is a preference about something specific.
When an investor says they prefer teams, they are worried about four things: that one person cannot cover product, engineering, sales and operations at the pace a funded company needs; that a single founder has nobody to check their judgement; that if the one founder burns out or leaves there is no company; and that a founder who could not convince one other person to join may not be able to convince customers or hires either.
Every one of those is a concern about execution and risk, not about headcount on the cap table. A solo founder who has shipped a product, has users, has a build partner or early hires covering the gaps, and has a track record of convincing people, has answered all four. A two-founder team where both are non-technical, both part-time and neither has shipped anything has answered none of them.
That is why the practical evidence says the preference is soft: YC has funded hundreds of solo founders, and plenty of well-known companies were solo-founded through their seed. What investors evaluate is whether the MVP and the traction reduce the risk, and a solo founder with a product is a lower-risk bet than a team with a deck. If you are going to raise as a solo founder, the product is your co-founder in the pitch. Do you need an MVP to raise funding goes into what “product” has to mean at each stage.
The six questions that decide it
Statistics describe populations. These six describe you. Answer them honestly and the decision usually makes itself.
1. Is the workload beyond one person at the stage you are at?
Not at the stage you imagine in three years. Now. An idea-stage B2B SaaS needs a first version built, five conversations a week with prospects, and a landing page. One person with a build partner can do that. A two-sided marketplace launching in four cities with a supply team and a demand team probably cannot be run by one person, and it did not need to be: DoorDash had four founders driving. Be honest about the workload of the next six months, not the company you hope to have.
2. Is the missing skill a founder-level skill or a hire-level skill?
If what you lack is the ability to build the product, that is a real gap and there are five ways to fill it, of which a co-founder is one. Do you need a technical co-founder is the full treatment; the short version is that “I can’t code” is a reason to get the product built, not necessarily a reason to give away half the company. If what you lack is a founder-level thing, deep domain knowledge of the customer, a network that produces the first twenty customers, the ability to sell to enterprises, that is harder to hire and easier to justify as a partner.
3. Do you already have the person?
The best co-founder decisions are made about a specific person you have worked with, argued with and shipped with. The worst are made about a hypothetical partner you have not met. If you have the person, the question is whether to formalise it. If you do not, “find a co-founder” is a project that takes six to eighteen months, with a high failure rate, and it delays everything else. How to find a technical co-founder is honest about that timeline, and about the fact that having something built first is the best co-founder magnet there is.
4. Can you make decisions alone, and can you share them?
Some people are better founders alone: they decide fast, own the outcome and do not need consensus. Some are better in a pair: they think by arguing and go quiet without it. You know which you are from every previous thing you have done. The wrong structure for your temperament fails regardless of what the data says about the average.
5. Is the equity worth more than the money?
A co-founder costs 30 to 50 percent of the company, vested over four years. A built MVP costs money, once. If the missing piece is a build, compare the two honestly: the equity a technical co-founder gets for building the first version, against the cost of having it built by a team you pay, with you keeping the whole cap table. For a founder who can fund or raise a small build, money is almost always the cheaper way to get a product. For a founder who cannot, equity is the only currency, and that is a legitimate reason to partner.
6. What is the cost of being wrong each way?
Wrong about going solo: you get overwhelmed, or hit a gap you cannot fill, and you go looking for a partner later, from a better position, with a product to show. Recoverable. Wrong about a co-founder: you have given half the company, vested, to someone you fall out with in month nine, and the company is the casualty. Wasserman’s two-thirds is that failure mode. The asymmetry matters: the solo mistake is cheaper to fix.
If you go solo: how the MVP gets built
This is the half of the decision the opinion pieces skip, and it is the half that decides whether solo works. A solo founder who cannot get a first version built is not a solo founder; they are a person with an idea. The four ways to get it built, in the order most founders should consider them:
Build it yourself with no-code or AI tools. Right when the product is a workflow, a form, a marketplace listing or a landing page with a payment link, and wrong when the value is the engineering. MVP for non-technical founders covers the four paths in detail; the honest limit is that no-code products are cheap to start and expensive to leave.
A freelancer. Cheapest paid option, highest variance. Works for a narrow, well-specified build with a founder who can manage it. Fails when the founder cannot evaluate the work or the freelancer disappears. Freelancer vs agency is the comparison.
An agency or build partner. A team that has shipped MVPs before, on a fixed scope and a fixed quote, with the founder keeping every share. This is the path that has replaced the co-founder for a large share of the solo founders in Carta’s numbers. It costs money rather than equity, it is faster than a co-founder search, and it produces the thing that makes every later decision easier: a product. The contract has to assign the code to your company; that is the one clause that matters most.
A fractional CTO plus contractors. For a founder who wants senior technical judgement without a full-time partner: someone who scopes, hires the contractors, reviews the work and leaves when the company can afford a full-time lead. Fractional CTO covers when it fits. The numbers are in fractional CTO cost.
Whichever path, the discipline is the same as it would be with a partner: validate before you build (MVP validation), scope the first version to one job, and read why MVPs fail before you spend, because most of the reasons have nothing to do with how many founders there were.
If you co-found: the things that prevent the two-thirds
If the answer to the six questions is a partner, and you have the person, the failure mode is not the decision; it is what you do in the first month. Four things:
- Paperwork before code. Split, vesting with a cliff, IP assignment, leaver terms, and in the US the 83(b) election within thirty days. All of it is easy to sign while everyone is happy. Technical co-founder equity lists the six documents.
- Roles in writing. Who decides what. Most conflict is not about equity; it is about two people both believing they own product direction.
- A trial before the split. Build something small together first, a weekend or a month, and see whether you can disagree and still ship. The founding engineer vs technical co-founder comparison is useful here: some of the people you are considering as partners are better as your first hire.
- Equal is not automatic. Near-equal is the honest default when contribution and risk are near-equal; it is not the default when one person is part-time or joining after the product exists.
What solo looks like when it works
Three patterns, drawn from the companies in this site’s MVP case studies and from founders we have built for.
The founder who bought the build and kept the company. A non-technical founder with a validated B2B idea and a small amount of capital, who spent a year looking for a technical co-founder, found nobody, and instead had a first version built on a fixed scope. Launched with three design partners, raised a pre-seed on the product and the pilots, and hired a founding engineer with a normal option grant. Owns the company. Would have given away half of it to the co-founder who never materialised.
The founder who went solo, then partnered from strength. Solo through validation and the MVP, with a build partner, then met a co-founder among the early users who understood the product better than anyone. Formalised it at 20 percent, vested, with the product already live. The conversation was about what the partner would add, not about who would build the thing.
The founding team that was really one founder. Two friends, one idea, one of them full-time. Equal split on a handshake. By month eight the part-time founder had contributed a logo and opinions; the full-time founder had built and sold everything and owned half. This is the Wasserman failure mode, and the fix would have been question five: is the equity worth more than the money? It was not.
The pattern across the first two is the same one in the Groupon and Stripe stories: the product came first and the team decisions were made with it in hand. A product does not need a co-founder to exist. A co-founder search is easier, and a co-founder deal is fairer, when it does.
Conclusion
Solo founder or co-founder is a decision about a specific person, a specific workload and a specific gap, not about which statistic you find more convincing. Teams scale better in venture portfolios; solo founders survive more often across the board; conflict kills more teams than anything else. The six questions above sort most founders into one of two positions, and the majority who are asking the question at idea stage land on the same one: no specific person, and the gap is the build.
For that founder, the answer is not to find a partner. It is to get the first version built by a team that does not take equity, put it in front of users, and then decide, from a much stronger position, whether the company needs a second founder at all. If it does, you will be offering a stake in something real, to someone who has already shown up.
If you are a solo founder working out how to get the MVP built without giving away half the company to do it, that is the conversation we have most often as an MVP development company: fixed scope, fixed quote, you keep every share. Start it here.
Related guides
- Do you need a technical co-founder?
- How to find a technical co-founder
- Technical co-founder equity
- Founding engineer vs technical co-founder
- MVP for non-technical founders
- Fractional CTO
- Freelancer vs agency for an MVP
- How investors evaluate an MVP
Frequently Asked Questions
Is it better to be a solo founder or have a co-founder?
Neither is better in general. Founding teams outperform in venture portfolios, where companies must scale fast; solo founders survive longer and reach revenue more often in broader samples; and co-founder conflict is the leading cause of early failure. The right answer depends on whether you have a specific person, whether what they bring is founder-level, whether the workload exceeds one person now, and whether the gap is the build, which can be filled without equity.
Can a solo founder raise money?
Yes. Investors prefer teams as a proxy for execution risk, not as a rule; Y Combinator and most seed funds have backed many solo founders. What closes the gap is a product with users, a build partner or early hires covering the gaps, and evidence that you can convince people. A solo founder with an MVP and traction is a lower-risk bet than a team with a deck.
What percentage of startups have a solo founder?
Roughly a third of newly formed startups on Carta’s platform in 2025, up from under a quarter in 2019. The rise tracks the falling cost of getting a first version built without a technical partner: no-code tools, AI-assisted development, contractors and agencies.
What is the solo founder success rate compared to co-founders?
It depends on the measure. First Round Capital found multi-founder companies in its portfolio outperformed solo founders by 163 percent. Greenberg and Mollick’s 2018 study of thousands of crowdfunded ventures found solo-founded companies more likely to survive and generate revenue. Wasserman’s research found around two-thirds of high-potential startups fail on founder conflict. Each measures a different population.
Why do investors prefer co-founders?
Four worries: one person cannot cover product, engineering, sales and operations at a funded company’s pace; a single founder has nobody checking their judgement; if the founder leaves there is no company; and a founder who could not recruit a partner may struggle to recruit customers or hires. All four are about execution risk, and a solo founder with a shipped product and a team around them has answered them.
Should I find a co-founder before building an MVP?
Usually not. A co-founder search takes six to eighteen months with a high failure rate and delays everything else, and a product is the best co-founder magnet there is. Get the first version built, put it in front of users, then decide whether you need a partner, from a position where you are offering a stake in something real.
How much equity does a co-founder get?
Near-equal when contribution, commitment and risk are near-equal; less when one person is part-time, joining after the product exists, or bringing a hire-level skill rather than a founder-level one. A technical co-founder building the whole product full time typically lands between 40 and 60 percent. Always vested, usually four years with a one-year cliff.
What causes co-founder conflict?
Mostly unclear roles and mismatched commitment rather than the equity number itself: two people who both believe they own product direction, or one full-time founder carrying a part-time one with an equal stake. The prevention is paperwork before code, written roles, and a trial project before the split is agreed.
Can a non-technical solo founder build a startup?
Yes, and it is increasingly common. The product gets built with no-code tools, a freelancer, an agency on a fixed scope, or a fractional CTO plus contractors, with the founder keeping the whole cap table. The condition is that the founder can manage a build they cannot do themselves, which means validating first, scoping to one job, and a contract that assigns the code to the company.
Is going solo riskier than having a co-founder?
The risks are different. Solo, the risk is overload and gaps you cannot fill, which is recoverable by hiring or partnering later. With a co-founder, the risk is conflict with someone who owns half the company, which is often not recoverable. The cost of being wrong is lower on the solo side, which is why the honest default for a founder without a specific partner in mind is to start solo and reopen the question with a product in hand.
