| Availability | Any hour it's set to answer, and several calls at once, depending on setup. | Depends on the plan. Some cover 24/7, some business hours only. | Always on, but nobody answers. | Their working hours, one call at a time, minus breaks and time off. |
| Handles well | Routine questions, collecting enquiry details, text replies, after-hours and overflow. | Taking messages with a human touch, callers who want a person, simple scripted tasks. | Callers who already know you and are happy to wait for a callback. | Judgement calls, relationships, complaints, in-person tasks, anything off script. |
| Common failure modes | Misheard details, callers who refuse to talk to a machine, answers outside what it was given. | Generic scripts, staff who don't know your business, messages that lack the details you need. | Many callers hang up without leaving a message. Callbacks are slow. | Sick days, turnover, missed calls when they're busy or away from the desk. |
| Cost structure | One-time setup plus usage that follows call and text volume. | Usually a monthly plan, often tied to minutes or calls, with overage charges. | Usually included with your phone service. | Wages, payroll costs, training and equipment, fixed whether the phone rings or not. |
| Best fit | High volume of similar calls, missed calls while you're working, after-hours enquiries. | Callers who expect a person, but not enough volume for staff. | Low call volume and mostly existing customers. | Steady volume, complex calls, front-desk work beyond the phone. |