A fair comparison
| Aspect | AI agent | Human tester |
|---|---|---|
| Repetition | Repeats the same check without boredom | Tires and takes shortcuts over time |
| Availability | Any hour, on a schedule | Working hours |
| Taste and context | Limited | Strong: feels what annoys a customer |
| Free exploration | Follows what it understands of the goal | Tries odd things on purpose |
| Documentation | Screenshots and steps every time | Depends on the person's discipline |
When do you definitely need a person?
- Before launching a new product or a full redesign.
- When your audience is sensitive to wording, as in clinics and financial services.
- To test native apps on real mobile devices.
- For security testing, which is a specialty of its own.
What about a team with no tester at all?
Most small projects have no tester in the first place, so the real comparison is not agent against human but agent against nothing. In that case the agent covers the repetitive checks, and the owner or one of the staff should still try the site through a customer's eyes once before each important release.