Begin with relevant experience, not the length of the client list. Ask for a couple of case studies that sit close to your stack, and then ask specifically whether those engineers are still with the laravel web development company. An honest provider will put you on a call with the engineers. Vague answers at this stage almost always mean you are talking to a reseller.
The agreement warrants a slower read than the pitch. A few clauses carry most of the weight: intellectual property assignment, confidentiality, and termination and handover. Everything produced should transfer to you on payment, including documentation, pipelines and deployment scripts. Watch for any clause that keeps framework code in the vendor’s hands, since this is frequently the dependency that makes switching painful.
Ask where their numbers come from. An honest estimate is accompanied by a list of assumptions, a breakdown by feature or module and a range rather than a single number. A fixed-bid deal only makes sense when the requirements are stable and documented; in any other case the vendor adds a risk premium and software product development company you fund the buffer regardless. A time and materials vs fixed price-and-materials model moves the risk back to the client, so it demands a sprint cadence, demos and a budget cap.
Process matters as much as headcount. Find out what happens when the scope changes, who signs off on a feature and what the QA setup looks like. A team will be able to walk you through a working build every one or two weeks. Written acceptance criteria are your only real protection against the it-was-never-in-scope conversation.
Last, think about the end of the engagement before it becomes urgent. Insist that the code repository sits on infrastructure you own from the first commit, and that the documentation is refreshed in every sprint. A partner who is comfortable with this says yes immediately; a long negotiation over it reveals a great deal.