AI ISA vs Virtual ISA vs In House ISA

The three models

In house ISA. An employee or contractor on your team, in your market, on your systems. They call leads, qualify them and set appointments for your agents.

Virtual ISA. The same role delivered remotely, usually through an agency, often offshore. The agency recruits, trains and replaces the person. You get the seat, not the hire.

AI ISA. Software that does the first response, qualification and follow up. It runs inside your stack and hands a lead to a person when the lead is worth a person.

Cost model

In house is a salary. A human ISA costs $3,000 to $5,000 per month, before the commission or per appointment bonus that most of these roles carry, and before recruiting and ramp time. One Indeed listing advertises 150,000 to 300,000 USD in total earnings against a 3,000 USD base, which shows how much of the number is variable and how much depends on your lead volume rather than on the person.

Virtual is a monthly rate per seat, usually lower than an in house salary because the labour market is different, with the agency margin on top. Published rates vary by provider and country, so ask for a written monthly figure before comparing.

AI is a system cost rather than a headcount cost, so it does not scale with volume the way the other two do. The number for your team depends on your lead volume and conversion rate. The ROI calculator returns it, free, without an email.

The comparison people usually get wrong: they compare the AI cost to zero rather than to the model it replaces. Compare it to what covering that shift costs you now.

Response time

This is the least ambiguous row in the table.

In house answers fast while they are at their desk, and not at all outside that. Virtual is the same, shifted by the time zone, which can help if the agency covers your evenings and hurts if it does not.

AI responds in under 2 minutes, every time, at any hour.

Speed matters more than anything else in this comparison because leads go to whoever replies first. Every model that depends on a person being awake has the same ceiling.

Coverage hours

In house covers one shift, five days, minus holidays and sick days. Virtual covers whichever shift you contract, and agencies will usually sell you extended or weekend coverage for more seats.

AI runs 24/7, always on, zero sick days, with unlimited lead volume and no quality drop.

Look at when your leads actually arrive before you weight this row. If your enquiries cluster in the evenings and at weekends, coverage is the deciding factor and not cost.

Consistency

In house varies with the person and with the month. The job is repetitive and the drift is gradual: contact rates slip slowly enough that nobody notices until a quarter has gone.

Virtual adds agency turnover on top. When the seat changes hands, the new person starts from whatever was written down.

AI does not drift. It asks the same qualifying questions in the same order on lead 10 and lead 10,000, and it does not stop following up because it had a bad week. Follow up runs 12 to 18 months rather than the three touches that manual follow up usually reaches.

What each one is bad at

In house ISA. Coverage and volume. One person covers one shift and roughly 50 leads per day. Continuity too: when they leave, the pipeline knowledge leaves with them unless every conversation was written into the CRM, which it never entirely is.

Virtual ISA. Context and continuity. A remote seat is further from your market, your inventory and your team's way of talking, so scripts carry more weight and judgement carries less. Turnover in the seat is a normal cost of the model rather than an exception.

AI ISA. Judgement. It handles the repetitive front of the funnel and it should hand off the moment a conversation needs a person. It does not negotiate, it does not advise on price, and it should never pretend to be a human when asked directly. A vendor who tells you their AI closes deals is selling you the last ten per cent of the funnel that it does not do.

What are the best real estate ISA companies?

Whichever model you pick, the same five questions separate the good vendors from the rest.

1. What does it integrate with? If it cannot read your CRM and every lead source, you have created a second pipeline to reconcile.
2. Who owns the conversation history when the contract ends? It should be your brokerage, exportable, not locked in the vendor's system.
3. What is the guaranteed response time, in writing, and how is it measured?
4. What happens when the person or the agent is unsure? A defined hand off is worth more than a clever script.
5. How is it measured in the first thirty days? Contact rate, appointments set and appointments held are all visible inside a month.

If a vendor cannot answer four and five plainly, that is your answer.

Should I hire an ISA for real estate?

Only if the problem is that leads are not being worked. An ISA of any kind, human or software, works the leads you already have. If you do not have enough leads, none of the three models fixes that and hiring is an expensive way to find out.

If leads are going unanswered, then the choice among the three comes down to when your leads arrive and how much of the day you need covered. Teams whose enquiries land inside office hours can get a long way with one person. Teams whose enquiries land at 11pm cannot, at any salary.

Most teams that run AI on the front of the funnel keep people for the conversations that are worth a person. That is not a compromise between the models. It is what the split is for.