How to find a cofounder for your startup

One of the most critical decisions an early-stage founder will make is whether to have a cofounder and, if so, how to find and vet the right one. We've seen plenty of solo entrepreneurs succeed, but many of the most successful startups were built by teams of cofounders that have supported each other through the highs and lows of the startup journey. In this article, we explore why having a cofounder can be valuable, what qualities to look for and the different avenues to find your partner for the long-haul.

Why you should have a cofounder

A cohesive and well-rounded founding team is the cornerstone of most successful startups. Cofounders must share values and vision and combine experience, technical chops, business savvy, people skills and leadership qualities into a whole that is greater than the sum of its parts. That's not easy to do. But the strategies that experienced founders and startup advisors recommend here will help you devise an approach to finding a cofounder that works for you. 

Having a cofounder can significantly increase your chances of success by providing:

• Complementary skills – A great cofounder brings skills you lack. If you’re a technical founder, a business-savvy partner can help with sales, fundraising and strategy. If you’re an operator, a technical cofounder can build the product.
• Emotional support – Entrepreneurship is a rollercoaster and having someone who shares the highs and lows can make all the difference to stay resilient.
• Increased credibility – Investors often prefer teams over solo founders, as it reduces key-person risk and demonstrates a well-rounded leadership team.
• Shared workload – With two (or more) people dividing responsibilities, the startup can move faster and execute better. 

According to data collected by Carta, solo founded companies have been on the rise for the past several years. Although it's a trend, that doesn’t necessarily mean it’s the right choice. For example, Carta states, "Compared to larger founding teams, solo founders are less successful in raising venture capital. While solo founders comprised 35% of all companies incorporated in 2024, they accounted for just 17% of all companies launched in 2024 that also closed a VC round before the end of the year."

As of late, advancements in AI have helped the solo founder approach by building and shipping product at faster rates than ever before, but AI hasn't yet solved the human element of the cofounder. Paul Graham, Cofounder of Y Combinator, addresses the cofounder advantage in his essay, How to start a startup: "The low points in a startup are so low that few could bear them alone. When you have multiple founders, esprit de corps binds them together in a way that violates conservation laws. Each thinks, 'I can't let my friends down.' It is one of the most powerful forces in human nature, and it's missing when there's just one founder."

What to look for in a cofounder

There are many similarities in choosing a cofounder and a life partner—this is someone you’ll be working with through intense highs and lows, making critical decisions and sometimes spending day and night with. Here are some aspects to keep in mind during your search: 

• Shared vision and values – Your cofounder should align with your long-term vision and startup philosophy. Misalignment in goals or ethics can lead to conflicts down the road.
• Complementary strengths – Look for someone whose skills fill gaps in your expertise. A technical founder and a business-focused founder are a classic combination.
• Trust and reliability – You need to trust your cofounder with critical decisions, finances and the company's future. Choose someone dependable.
• Adaptability and problem-solving ability – Startups pivot often, and you need a cofounder who can navigate uncertainty and find creative solutions.
• Work ethic and commitment – The early days of a startup require long hours and sacrifice. Ensure your cofounder is as dedicated as you are.

Where to find a cofounder

Once you know what you're looking for, the next challenge is actually finding the right person. Here are three key ways to search for a cofounder: 

1) Your personal network 

Your immediate network is often the best place to start because you already have relationships built on trust. Some approaches include: 

• Colleagues and classmates – People you've worked with before can be ideal cofounders, as you already know their skills and work ethic.
• Friends and mutual friends – While friendships don't always translate into business partnerships, a friend with the right skills and mindset could be a great fit.
• Industry meetups and conferences – Events related to your startup's industry can help you connect with like-minded professionals who might be looking for a new opportunity.

2) Online platforms and communities 

If your network doesn't yield the right match, online platforms can help you find cofounders beyond your immediate circle. Some popular options include:

• Cofounder matching websites – Platforms like CoFoundersLab, Y Combinator's Cofounder Matching, and FoundersList specialize in connecting entrepreneurs.
• Startup forums and Slack groups – Communities like Indie Hackers, r/startups on Reddit, and various startup-focused Slack groups can be great places to meet potential cofounders.
• AI matching tools – Some startups are tackling this use case, like Boardy, "the world's most connected AI."

3) Startup accelerators and founder programs 

Many startup accelerators and incubators facilitate cofounder matchmaking. Some programs to consider:

• Y Combinator, Techstars and Antler to name a few – Most have cofounder matching tools and startup school events help connect founders with complementary skills.
• On Deck Founder Fellowship – A community-driven program that helps founders connect and build companies together.
• Local startup hubs and university programs – Many universities have entrepreneur-in-residence programs or startup incubators where you can meet potential cofounders.

What do you do once you've found a cofounder candidate?

Due diligence checks are a critical part of the process. They can be especially fruitful in tight-knit startup circles in Silicon Valley or New York. "The backchannel is really important," says Hunter Walk, a partner at VC firm Homebrew. "Obviously, the references are going to say glowing things," says Walk. "But you can learn a lot in a short time by having three to five confidential conversations."

The aim is not to uncover dirt on someone—that rarely happens, Walk says—but to really understand whether a person has the strengths necessary to be a cofounder. "Some people are very established, but as individual contributors," says Walk. "Have they had experience building teams? There are folks who may be wonderful thinkers but have difficulty convincing others to join them."

Don't be afraid to be probing. "Doing good reference checks is hard, so be sure that you get plenty of specific and detailed examples to support the positive and negative things that come up," says Ariel Poler, a serial entrepreneur and veteran investor. 

Some sage advice given to founders today is this: do not rush to enlist a cofounder just to check a box. Focus first on telling your story, building your product and attracting customers. As you get yourself out there, that early employee or passionate angel investor could eventually become the cofounder you were looking for all along. It may take time. But these things often happen when you take the weight of the cofounder title out of the equation. If you are focused on the things that matter the most, the rest will fall into place. Keep building!

Final thoughts

Finding the right cofounder takes time, but it's one of the most important steps in building a successful startup. Whether you tap into your personal network, leverage online tools, or join an accelerator, focus on finding someone who shares your vision, complements your skills and is equally committed to the startup journey.

The right partnership can be the difference between a struggling startup and a thriving business—so choose wisely.