What is an AI cofounder?
Software that does the jobs a cofounder would. Here's what that means in practice, and where it stops.
Updated November 11, 2026
An AI cofounder is an AI tool that takes on the work a business partner would do. Instead of answering questions in a chat, it acts: researches the market, builds the website or app, sets up payments, writes and sends marketing, answers customers and reports back.
The term is loose, and companies use it for very different products. The easiest way to make sense of them is to ask which of a founder's four jobs each one actually does.
The four seats
- Ideathe strategist
- Buildthe builder
- Sellthe seller
- Runthe operator
- Idea: finding a problem worth solving, checking demand, sizing the market, writing the plan.
- Build: making the product, website or app, and fixing it when it breaks.
- Sell: taking payments and bringing in customers through email, social, ads and outreach.
- Run: the daily work after launch, like support, follow-ups, reporting and small fixes, done without you starting each task.
The five kinds on the market
- Full AI cofounders such as Crevio, MadeThis and Polsia aim to fill all four seats and keep working after launch.
- AI founding teams such as Atoms and CoFounder.AI give you a coordinated set of specialist agents that you direct.
- AI employees such as Viktor and Marblism do assigned work inside tools you already use.
- AI technical cofounders such as Lovable, Replit, Bolt and Base44 write the software.
- Idea and planning partners such as Buildpad, LivePlan and ValidatorAI help you think before you build.
What it costs
Most AI cofounders cost $20 to $100 a month for one business, billed partly in usage credits. Some also take a share of your revenue or payments. Polsia takes 3% of payments and 20% of ad spend, and NanoCorp takes 20% of withdrawals. Crevio takes 2.5% of sales on paid plans. Always work out the cost at the revenue you hope to reach. Our pricing comparison has every tool's terms.
How to work with one
- Give it the specifics: who the customer is, what you sell, your price, your voice.
- Keep approvals on at first for payments, ad budgets and customer emails.
- Check that payments go to your own account and that you can export your data.
- Review its work weekly, and turn corrections into standing instructions.
The top-ranked AI cofounders
- 19.1
CrevioFull AI cofounderFrom $25/mo - 27.7
CofounderFull AI cofounderFrom $40/mo - 37.6
MadeThisFull AI cofounderFrom $49/mo - 47.3
PolsiaFull AI cofounderFrom $20/mo - 56.9
CoFounder.AIAI founding teamFrom $39/mo - 66.9
Locus FounderFull AI cofounderFrom $20.83/mo - 76.7
ViktorAI employeeFrom $50/mo - 86.6
AtomsAI founding teamFrom $20/mo
Questions founders ask
Is an AI cofounder a real cofounder?
No. It has no equity, no legal role and no stake in the outcome. It's software that does cofounder-type work: research, building, selling and operations. You remain the only founder.
What can't an AI cofounder do?
It can't take responsibility, sign contracts in its own name, build real relationships with customers or investors, or know things about your market that aren't written down anywhere. It also makes mistakes, so keep approvals on for anything important.
How do I get started with an AI cofounder?
Describe the business in a few sentences: who it's for, what you'll sell and what makes it different. Let the AI propose a plan, approve the first steps, and review what it does in the first week before giving it more freedom.