I would rate the scalability an eight out of ten because you can very easily add some new nodes to the instance, for example.

There are no issues while scaling up. 

There are four developers and customers across the organizations; the number of customers could be ten teams using this solution, for example. 

It's good. I haven't encountered any issues.

These products are highly scalable in my experience. They are scalable both horizontally (grid, multi-node environment) and vertically (more CPU cores). They are also scalable in terms of the pushdown capability to the database engine or hive.

Informatica is highly scalable.

The scalability of Informatica Test Data Management is good. We use quite a large database and the performance is decent. However, we had to tune it for a while until we could achieve a good performance. The solution is able to be tuned, but it's not obvious if you have only recently implemented it to receive better results.

There were no scalability issues.

I have not had any scalability issues because the product uses the ETL part of the suite (PowerCenter).

It is highly scalable.

I have not encountered scalability issues.