Has anyone migrated from one Google Workspace to another after a company merger?

I've been through a fair few of these consolidations over the years, and two Workspace accounts merging into one is always the trickier sort if you don't map it out first. Last time it came up we went with EdbMails. There's no third-party caching, so the data moves straight between the two accounts. It's SOC 2 Type 2 and ISO certified and covers GDPR and HIPAA, which tends to be the first thing legal asks about the moment a merger is on the table.
Mail, contacts, calendars, and tasks all came across without much fuss. The folder structure held together and nothing went missing on either account, which was honestly my biggest worry going in. Support held up as well. It's 24/7, and we actually reached a real person on live chat to clear up a couple of questions. All in all, well worth it for a Google Workspace migration.