payroll service providers

Has anybody utilized a payroll service providers in/around Zurich that they can suggest?

Somebody that will deal with the mechanics of payroll, quellensteuer, different allowances/changes, and so forth for a little (5-10 workers) office, passing in the group to zero in on what they do…?

I realize outfits like Mercer do this, however, they are very costly for a little organization.