Hiring in-house delivers the deepest product knowledge. The developers absorb the business domain over time, and this context remains in the building. The catch shows up as slow hiring and fixed overhead: recruiting a strong engineer is slow, getting someone productive takes several more weeks, and the cost carries on through the quiet quarters.
Handing a project to a vendor is the arrangement where the vendor owns delivery: the partner staffs the roles, they manage the plan, and the provider carries the staffing risk. This fits well when the outcome can be described and you have an available product owner. It fails when nobody on your side owns the product, because an external dedicated team vs freelancer cannot invent your business rules.
Staff augmentation is the middle option: you bring in developers and keep the management in-house. The main advantage is speed — the right specialist can join almost immediately — and the commitment ends when the work does. The trade-off remains that your technical leaders need time for code review and planning. Without that, the result is paying for effort with no owner.
In practice, the models mix. One durable pattern puts architecture, product decisions and vue web development core domain code inside the company, best aso company while an outside vendor handles the parts that are bounded and specifiable. The rule is easy to state: retain what defines your product, and delegate the well-trodden work.
Three questions generally decide the matter. Start here: is this software central to how you make money, or internal plumbing? Next: for how long does the work continue — months or years? Finally: who will maintain it in two years? Work through them with real answers and the appropriate option usually chooses itself.