Start with relevant experience, not the number of logos on the website. Ask to see three or four engagements that match your domain and your stack, and then ask which engineers actually built it. An honest provider will introduce you to the people who would work on your project. Vague answers at this stage almost always mean the delivery team is not the team you were shown.
The paperwork needs a slower read than the pitch. A few clauses carry most of the weight: assignment of intellectual property, confidentiality, difference between laravel and wordpress termination and handover. Everything produced should transfer to you on payment, along with documentation, pipelines and deployment scripts. Look closely at wording that keeps framework code with the vendor, since this is frequently exactly the piece that locks you in.
Ask where their numbers come from. A credible estimate comes with a written set of assumptions, a breakdown per feature and a best case and a worst case. A fixed price only makes sense when the scope is genuinely frozen; when the scope is still moving the vendor kubernetes development services adds a risk premium and you pay for it anyway. Hourly billing shifts that risk to you, ai automation services so it demands a cap, regular demos and transparent reporting.
How the work is run matters more than the number of developers. Find out what happens when the scope changes, who writes the acceptance criteria and how quality assurance works. A mature team can walk you through a live build at the end of each sprint. Clear, written acceptance criteria stay the only reliable protection against the it-was-never-in-scope conversation.
Before signing, consider the day you no longer need this vendor at the start rather than at the end. Ask that the code repository sits under your account from day one, and that documentation is written as you go rather than left to the end. A provider confident in its own work says yes immediately; hesitation here says most of what you need to know.