It seems the only decent option for Hubspot to Hubspot account replication/migration is a $600 integration tool from Datawarehouse? That’s a bit pricy.
I also saw a portal replicator from Leadsruptive. The price is better, $250, but the reviews are not good.
The HubSpot to HubSpot portal migrator by Datawarehouse.io is not the only option, but it’s the most most comfortable and, as far as I know, most widely used and best rated one.
You could also check out MigrateMyCRM by SyncMatters: HubSpot Marketplace – I haven’t used it yet and fewer items are included in the migration; so it depends on what exactly needs to be migrated.
Lastly, if you have developer resources, there’s always the option to approach this from scratch with the HubSpot API: 2026-03 API reference - HubSpot docs