Claude vs ChatGPT for developers: lessons from real ERP builds
Claude or ChatGPT? A working developer's comparison, including how we built X3 Retail ERP with parallel Claude Code agents that learn from their own mistakes.
Read articleMVPs and full-stack web and mobile apps in Next.js, NestJS and React Native, live in weeks, with a working demo every week and an architecture that can grow.
Most first versions are too big. A founder arrives with forty features, all of them reasonable, and the plan quietly turns into six months of building before a single customer touches it. By then half the features were guesses, and the money for the next round of learning is gone.
So the first week goes on one question: what is the one thing a customer will use, or pay for, in week one? Everything else goes on a list for later. Login, the core workflow, payments if money changes hands, an admin screen so you can run it without us. That is usually enough to learn whether the idea works.
What we don't cut is the foundation. The data model, security and deployment are built properly from the start, because an MVP that works becomes the product, and rebuilding a foundation under paying users is the most expensive kind of rework. We have rescued enough prototypes to know.
How an MVP usually runs with us.
Typical ranges from our cost estimator.
| Build | Typical range | Timeline |
|---|---|---|
| SaaS MVP | $12,500 to $20,500 | 6 to 9 weeks |
| Mobile App | $13,000 to $21,000 | 6 to 9 weeks |
| Marketplace App | $19,500 to $31,500 | 8 to 11 weeks |
| E-commerce Store | $12,500 to $20,000 | 6 to 9 weeks |
Change the features in the cost estimator to see your own range and download it as a PDF.
Things founders often ask for in an MVP that can usually wait.
Usually within a few weeks. AI takes care of the repetitive work (boilerplate, CRUD, tests, docs), and you see working software in a demo every week.
A SaaS MVP is typically $12,500 to $20,500 over 6 to 9 weeks. A mobile app or marketplace costs more because there are more sides to build.
It shouldn't. We keep the scope small but build the data model, security and deployment properly, so the first version can grow into the product.
Yes. It lives in your repository and your cloud account from the first commit.
Answer three quick questions and we'll send a written plan covering scope, team, timeline and estimate.