Both terms get used for the same thing, and they are not the same thing. One is a capability. The other is a role. Which one you are buying decides who owns the outcome when it goes wrong.
An agent is a capability you call. It does a task, it returns, it stops. The person who called it still owns the thread of work it was part of.
An Operator is a role. It holds a job with a brief and a remit, it reports to a named person, it works a queue rather than a prompt, and it is accountable for an outcome across weeks rather than seconds. The thread of work belongs to it.
An agent's unit is the task. Summarise this call. Draft this reply. Find the five candidates who look most like this one. It is measured on whether it did that task well, and it is finished the moment it hands back.
An Operator's unit is the job. Every response to yesterday's adverts is screened by nine in the morning, in a consistent order, with the rejections sent and the shortlist on someone's desk. Nobody called it. It knew the work was there.
That sounds like a small distinction and it is the whole distinction. A task can be excellent and still leave the job undone, because most of the job was never the task. It was noticing the work had arrived, deciding the order, chasing the half of it that did not fit the pattern and knowing what to do when something looked wrong.
One agent is easy to love. It does a thing that used to take twenty minutes and now takes one, and the person using it is delighted.
Fifteen agents is a different experience. Each one is still good. But somebody has to know which to call and when, somebody has to carry work from the output of one to the input of the next, and when the result is wrong there is no one to ask, because no single agent was responsible for more than its own step. That somebody is usually one of your better people, and the work they are now doing is coordination.
This is the point most firms reach and misdiagnose. It reads like a tooling problem. It is an accountability problem. Capability was added without anyone being made responsible for the outcome, so responsibility fell back to the nearest human by default.
None of those are model features. They are the things a business already does to make a job accountable, applied to work that happens to be done by software.
It does not remove people. The honest version of this, and the one we say to clients, is that it removes the need to hire more. The back office of a growing firm absorbs headcount in a very particular way: the work is repeatable, it scales linearly with volume and it is nobody's career. That is the part an Operator takes.
The judgement, the relationships, the negotiation and the exceptions stay exactly where they were, with the people who are good at them and who now have the time to do more of it. If a supplier tells you the same system also does that part, ask them to show you it doing it on a bad week.
Often. If the task is well defined, if the person calling it is already holding the thread of that piece of work, and if the job is finished when the answer comes back, an agent is the cheaper and better choice. Wrapping a role around it buys you governance you do not need and a layer of indirection you will resent.
The test is simple. Ask who is accountable if this runs for a month and the outcome is bad. If the answer is a person who is close to the work and would notice, you want an agent. If the answer is nobody in particular, you either want an Operator or you want to stop doing that work.
Three signals, and two of the three is usually enough.
If none of those is true, buy the agents, use them well and spend the money somewhere else. Not every business needs a back office that runs itself, and it is cheaper to find that out before building one.
Operators are one strand of what we do, not the whole of it. Most engagements start with an intelligence layer over the systems a firm already runs, because that is where the compounding advantage lives. Operators are what you add when the answer to a capacity problem would otherwise be another hire.
You can see the five we built for recruitment, hear them introduce themselves, and read what each one is accountable for.