Short answer: Polsia is the better choice for founders who want maximum autonomy and minimum oversight, and who are comfortable with a hosted, revenue-shared setup. CoFounder.AI is the better choice for founders who want one product covering strategy, design and development with an agent team, and who have already decided the idea is worth doing. On price, Polsia starts at $20/mo (reported) and CoFounder.AI at $39/mo. Full table, real strengths and real limitations below — and a third option at the end if neither is quite the shape you need.
| Area | Polsia | CoFounder.AI |
|---|---|---|
| What it is | A fully autonomous AI operator that launches a company and runs it overnight — site, posting, cold outreach and paid ads — with minimal human sign-off. | An AI business partner with a specialist agent team across five working surfaces — Founder Focus, Mission Control, Design Studio, Dev Shop and Artifacts — from $39/mo. |
| Free tier | A free plan is listed by third-party trackers; the in-product paid tiers start immediately after it. | None. |
| Entry price | $20/mo (reported) | $39/mo |
| Best for | Founders who want maximum autonomy and minimum oversight, and who are comfortable with a hosted, revenue-shared setup. | Founders who want one product covering strategy, design and development with an agent team, and who have already decided the idea is worth doing. |
| Strongest at | Genuinely fast: a company shell and a live site exist minutes after you describe the idea | The broadest single-product surface in this comparison — strategy, design and dev in one place |
| Biggest limitation | Independent reviews found tasks marked complete that never deployed — one audit put 41 of 47 "complete" tasks at roughly 21% actually real | No free tier — $39/mo before you know whether it works for you |
| The number worth knowing | One published audit of a Polsia venture found 41 of 47 tasks marked "complete", with roughly 21% verifiable as actually done. | CoFounder.AI starts at $39/mo for 3,000 credits and adds human teammates at $9 each on Pro and above. |
Prices and claims about Polsia and CoFounder.AI were checked against the sources below on 2026-08-30: Trustpilot — Polsia reviews · Preuve — hands-on Polsia review · CTO.new — Polsia audit & code-export review · Superapp — Polsia pricing modal, 17 Aug 2026 · Findstack — Polsia pricing tracker · Hacker News — ARR & account discussion · CoFounder.AI — homepage and pricing. Pricing changes: the number on their own site wins over the number on ours. Product names are trademarks of their owners; these are independent comparisons.
Polsia proved that founders want an AI that runs the company, and the overnight cycle genuinely ships. The problem reviewers keep hitting is that "done" is not checked: tasks close without evidence, outbound goes out unreviewed, and the company lives on Polsia's infrastructure with a reported 20% of revenue and ad spend flowing through them. kitty.build takes the same autonomy and adds two constraints Polsia does not have — a task is only done with a verifiable artefact attached, and nothing outbound sends without your yes — while your repo, domain and Stripe stay yours.
CoFounder.AI covers more of the founder's job in one product than almost anything else here — strategy, design and development each get their own surface and their own specialists, and the $9 human seats make it usable by a small team rather than a solo operator. What it does not do is challenge the premise: it is a partner for the idea you brought, with no independent verdict and no free tier to test the fit. kitty.build starts by trying to disprove the idea for free, and closes every task with evidence attached. If you want a broad AI team and you are already committed, CoFounder.AI is a serious option.
kitty.build is the only tool in this set that both refuses to build a bad idea and builds the good one. Nine boards research the live web, cite what they find and return a GO / PIVOT / NO-GO verdict for free; if the verdict is GO, the same product ships the site on your domain, writes the code into your GitHub repo and runs daily cycles where a task only counts as done with evidence attached. The trade is that it is a subscription and it is opinionated. If you want a single document, or you want to art-direct every pixel yourself, something else on this list fits you better.
If what you want is exactly what Polsia or CoFounder.AI is best at, buy theirs — we say so on every page. If the gap you keep hitting is that nothing checks whether the idea is worth building, that is the gap kitty.build was built for, and the first verdict costs nothing.
Nine boards research the live market, cite every claim and return GO / PIVOT / NO-GO — free, no card. Then pick your builder, or let Kitty ship it.
Start free — no cardNo revenue share, ever · Failed tasks are free · Your repo, your domain, your data