Usually, yes, but not automatically.

Honestly, outsourcing avoids the fixed costs of a full-time hire (salary, benefits, office overhead), and providers with hourly or usage-based pricing mean you’re not paying for idle time. But if a provider is priced high per seat, or you need heavy hand-holding to get quality up, in-house can end up comparable. The honest answer is: cheaper on average, BUT not cheaper by default.