UB Data Migration Pro v3.2.4 here. Fully compatible with Magento 2.4.0.
Jun 28, 2018 Update
UB Data Migration Pro version 3.1.5 has just been released -- here, with an absolutely refreshed Dashboard UI. Fully compatible with Magento 2.2.5. It supports Command-line Interface (CLI) which allows you to proceed migration steps using the command lines in CLI mode, after completing all pre-migration setting steps.
After months of hard work, UB Data Migration Pro v3.0 (V3) is now a reality. I am excited to announce that the version 3 (V3) is a complete overhaul compared to its older sibling.
The new V3 provokes familiar questions:
- Can I migrate Magento 1 data into an existing Magento 2 database?
- I have new customers, order and inventory changes during the development time, can I transfer such new data from Magento 1 site without re-migration from the scratch?
- Is it possible to migrate only specific data portions?
The short answer: YES. Even better, the V3 makes life easier for large-scale data migration, with one of the most striking new features -- Delta migration.

UB Data Migration Pro V3