I heard a lot about Shoviv , it looks great, and it is one of the best alternatives to Sharegate and Gs Richcopy 360. I will love to give Shoviv a try
Suppose you have large PST files that are prone to corruption of data; therefore, many users consider to import PST to Office 365. You can also execute the importing task manually or with a third-party tool like Shoviv PST to Office 365 Migration Tool. The user, who is a technical expert, should execute the task manually because you can face complications with this method. However, with the professional tool of Shoviv, you can straightforwardly execute the task, and the software interface is user-friendly too. You can save PST files into HTML, EML, MSG, vCal, and VCard.