Begin with proven experience, not the length of the client list. Request three or four case studies that resemble your technology stack, and then ask specifically who actually wrote that code. An honest provider will introduce you to the tech lead. Evasive answers at this stage almost always mean the demo work came from somewhere else.

The paperwork needs more scrutiny than the proposal. Three sections matter more than the rest: assignment of intellectual property, non-disclosure, and exit terms and handover. Everything produced has to transfer to you on payment, along with designs, scripts and infrastructure configuration. Watch for any clause that keeps framework code in the vendor's hands, as it is usually exactly the piece that locks you in.

Find out how ai changes software development the estimate was built. A serious estimate is accompanied by a list of assumptions, a breakdown per feature and a best case and a worst case. A fixed price is only reasonable when the scope is genuinely frozen; in any other case the supplier prices the risk in and you pay for it anyway. A time and materials contract-and-materials model puts the risk on your side, so it needs a cap, regular demos and transparent reporting.

The delivery process matters as much as team size. Establish how a new requirement enters the plan, who defines done and what the QA setup looks like. A mature team can demonstrate running software rather than status reports. Clear, written acceptance criteria are your only real estate software development company protection against endless rounds of rework.

Last, think about the day you no longer need this vendor before it becomes urgent. Require that the source repository lives on infrastructure you own from the first commit, and that the documentation is refreshed in every sprint. A vendor with nothing to hide will agree quickly; a long negotiation over it reveals most of what you need to know.