Guarantees
A private IT recruiter can't give you a 100% guarantee of filling an opening on time. Something can always go wrong: an unexpected illness, limited financial resources, a banal lack of time.
The agency doesn't have these risks: a recruiter can always replace a sick colleague and all the working timeб the specialist devotes directly to the selection process. Unlike a freelancer, an agency recruiter doesn't need to think about finding new customers, bother with the personal brand promotion or do the bookkeeping.
In addition, due to the lack of rainy day funds, a stable salary and free time, freelancers can't always guarantee a free replacement of a candidate if they don't complete the probationary period.