Here are some aspects where you can save resources by outsourcing services: administrative costs (rent, taxes, accounting), recruitment and HR processes, management, and education.
Have complete control over the development of your projects. Adjust the team size up or down when you need it without wasting time on onboarding or off-boarding a specialist.
Bringing a product to the market goes even faster if you save time spent on finding the most appropriate technology stack and experience. Admit it, it's much more convenient when you just have a task.
No worries about the quality of the specialist's work. The company that outsources some specialists guarantees the specialist's competence and hard and soft skills for successful work with clients.
Look better for clients by operating with more technologies under tighter deadlines. You bring in external specialists confidentially and have a better chance of getting positive customer feedback for your marketing strategies.
Put the focus of the HR department on the strategy of developing in-house employees and finding new employees for your core technologies. Small tasks are always better to delegate.