Data migration tool - Parent and related entities

Hi,

Currently we have two CRM 2016(On-premise) production environment and would like to merge the data from Server1 to Server2 and planing to make it as one instance so that it will reduce user and developer efforts.

I’m looking for a tool where I can migrate the data for parent and related entities also in same time. 

Example :  Account and related entities.

Following tools has option to migrate it one by one

1. Scribe Insight
2. Kingswaysoft

Really appreciate if you could help me to find a tool migrate the data for parent and related entity.