A number produced without questions counts as a red flag rather than good service. Any serious team responds with clarifying questions before any number: about integrations. A provider that commits to a figure without asking anything is probably pricing a guess, outsourcing and development insights that guess becomes a change request later — and you will pay for it.

Watch for any distance between the team in the pitch and those who eventually appear in the repository. Insist on named engineers in the agreement, with wording about substitutions. A vendor llm integration that talks only about abstract roles and will not commit to people is reserving its own flexibility at your cost.

Ask for commit-level visibility from day one. A team that shows nothing between demos is asking you to trust a black box. Regular commits and pull requests reveal how many people are really working far better than a weekly report. The same holds for the automated test suite: if nothing runs automatically, promises about quality are just talk.

Ambiguous phrasing around code ownership is rarely a formality. The contract must state plainly that all deliverables become the property of your react software development company on payment. Look too at which country’s law applies and how payments are structured: heavy prepayment with no milestone tied to it eliminates your only leverage.

Finally, look at how they communicate. Establish how much does it cost to build an app many hours there will be each day, which person answers questions and within what time. A few hours of overlap is normally sufficient; zero overlap stretches each small question into a day of delay. Sloppy written English in the proposal will not improve later.