Solo-Founded Startups Hit 36% as AI Collapses the Cost to Build

What happened

The share of new startups founded by a single person has climbed from 23.7% in 2019 to 36.3% by mid-2025, according to Carta's data on companies on its platform. The acceleration is recent and steep, the jump from roughly 30.5% to 36.3% across 2024 and 2025 lines up almost exactly with the mainstream arrival of AI coding assistants and agentic tooling. On a full-year basis, about 36% of startups formed on Carta in 2025 were solo-founded, up from 31% the year before.

The mechanism behind the shift is cost. Industry estimates now put a complete solopreneur tech stack at roughly $3,000 to $12,000 per year, described as a 95–98% reduction versus the cost of hiring equivalent staff, and consistent with operating margins in the 60–80% range. When the marginal cost of an additional "team member" collapses toward the price of a software subscription, the historical reason to take on a co-founder or early hires, you couldn't physically do the work alone, weakens considerably.

The proof points are no longer hypothetical. Maor Shlomo built Base44, a vibe-coding platform, entirely on his own; within roughly a month of its February 2025 launch it had reportedly generated nearly $1.5 million in subscription revenue, and by June Wix had acquired it for $80 million, about six months from launch, with the product reportedly reaching 250,000 users and profitability. Long before the current wave, Pieter Levels demonstrated the template with a portfolio of profitable, independently run products, and Carrd's solo-founder revenue story, one person hosting 4 million sites at an estimated $1.5M ARR since 2016, proved the one-person model could reach real scale without any AI tailwind at all. And Anthropic CEO Dario Amodei publicly put the odds of a one-person billion-dollar company emerging at "more like 70 to 80 percent," walking back a more absolute earlier claim but still pointing at software-native, high-margin sectors as the likely birthplace.

Why it matters for practitioners

For the bootstrapped, product-led founder, this is less a novelty headline than a structural change in what's achievable without raising money or building an org.

1. The "you need a team to scale" axiom is weakening. For two decades, the implicit advice to ambitious founders was that solo founding capped your ceiling, you'd hit a wall where one person couldn't ship, support, and sell fast enough. AI agents change the binding constraint. Coding, customer support, content, and analysis are precisely the functions that compress best, which is why the economics of the one-person model now pencil out at revenue levels that used to require a dozen people. The ceiling hasn't disappeared, but it has moved up by an order of magnitude.

2. Solo founding is increasingly a profitability advantage, not a liability. The venture narrative has long treated solo founders as a risk factor. The data cuts the other way for the bootstrapped path: with a $3K–$12K annual stack and no payroll, a solo founder reaches profitability faster and keeps more of every dollar. There are no salaries to cover before you're in the black, no dilution, and no coordination overhead. For founders optimizing for ownership and durability rather than a venture-scale exit, the structural odds described in the broader startup success data increasingly favor staying lean.

3. The default GTM is product-led by necessity. A solo founder cannot run a sales-led motion, there's no one to staff it. That forces the go-to-market into a product-led growth shape: the product has to acquire, activate, and expand users on its own, with the founder's time spent on the product and the funnel rather than on outbound or demos. Base44's trajectory, self-serve signups compounding to a quarter-million users before acquisition, is the canonical version of this. The constraint of being alone pushes you toward exactly the motion that scales without headcount.

Key details

• Solo-founder share: 23.7% of new startups in 2019 → 36.3% by H1 2025 (Carta)
• Full-year 2025: ~36% of Carta startups solo-founded, up from 31% in 2024
• Inflection: sharpest rise (30.5% → 36.3%) coincides with mainstream AI coding/agentic tools in 2024–2025
• Cost collapse: modern solo tech stack ~$3,000–$12,000/year, cited as a 95–98% reduction vs. equivalent staffing; 60–80% operating margins
• Base44: solo-built by Maor Shlomo; ~$1.5M subscription revenue within ~a month of its Feb 2025 launch; acquired by Wix for $80M by June 2025 at ~250,000 users
• Pieter Levels: long-running example of a profitable, solo-run product portfolio without outside funding
• Amodei prediction: ~70–80% chance of a one-person billion-dollar company, most likely in software-native, high-margin sectors

Market implications

The deeper story is that AI is repricing the cost of capacity. When adding a function meant adding a person, founding teams were a hedge against the work being too big for one. As agents absorb the high-margin, software-native functions, the build, the support, the analysis, the hedge gets expensive relative to its payoff. That doesn't mean teams disappear; it means the threshold at which you need one moves substantially higher, and a meaningful band of companies that used to require a small team can now be run by one person.

For bootstrapped founders, this is opportunity rather than threat. The incumbents most exposed are the ones carrying large headcounts and the cost structures to match; a solo or small-team operator can adopt the lean stack from day one and let margin, not payroll, define the business. The state of bootstrapped SaaS already skews toward small, profitable, founder-run companies, and the AI cost collapse pushes that center of gravity further toward the individual. The realistic ceiling for a one-person business in 2026 is higher than it has ever been.

The caution worth keeping is that "can be done alone" is not "should always be done alone." Reporting on the trend is candid that solo founding has real limits, distribution, judgment under pressure, and the simple bandwidth of one person's attention don't fully automate away. The honest read is that AI removes the capacity constraint, not the strategy constraint. The founders who win this shift will be the ones who use the freed-up leverage to go deeper on the few decisions that still only a human can make, what to build, who it's for, and how it reaches them, rather than treating headcount-free operation as the goal in itself.

Related resources

• Founder Economics, The unit economics that make the one-person and small-team model work
• Startup Success Rates, Survival and profitability odds for lean, bootstrapped startups
• What Is Product-Led Growth?, The default GTM motion for founders operating without a sales team