Platforms that allow allocating shares across sub accounts?

I have an advisor account with IB that lets me allocate my orders across sub accounts. Are there any other platforms that have this feature? I'm happy with IB but I want to see what other offer.
T.I.A.

 

When you say platform do you mean a broker platform? (As opposed to 3rd party order entry platform.)

 

Broker or third party software... either. Thx

 

One last try.. does anyone know of other platforms that allow this? Thx

 

I've used the MAT feature at MB Trading

https://www.mbtrading.com/manageAccountToolHome.aspx