"Should we hire an agency or build a team?" is really four questions wearing one coat: how fast do you need to move, how much will it cost, how much control do you want, and where should the knowledge live? The honest answer is that it changes with your stage — and often the smartest move is a mix. Here's how to reason about it instead of defaulting to whichever feels safer.
Speed: the agency's clearest edge
An established agency can start next week with a team that has already worked together. Hiring in-house — sourcing, interviewing, onboarding, waiting out notice periods — realistically takes months before anyone ships. When time to market is the binding constraint, that gap is decisive. Agencies win on speed almost every time.
Cost: cheaper up front, different long-term
An agency's hourly or project rate looks expensive next to a salary. But a salary is the smallest part of an employee's true cost — benefits, equipment, management, and the risk of a bad hire all stack on top, and you pay whether or not there's work to do.
