Based on our record, imapsync seems to be more popular. It has been mentiond 8 times since March 2021. We are tracking product recommendations and mentions on Reddit, HackerNews and some other platforms. They can help you identify which product is more popular and what people think of it.
I would first sync the accounts using IMAPsync by Gilles Lamiral. https://imapsync.lamiral.info/. - Source: Reddit / 14 days ago
We've used this https://imapsync.lamiral.info/ to do IMAP to IMAP before. Works great, very reliable. It likely won't do contacts/calendars since I don't believe those are populated via standard IMAP. - Source: Reddit / 3 months ago
I can recommend imapsync. Liked it so much I donated a little dosh to the developer. https://imapsync.lamiral.info. - Source: Hacker News / 4 months ago
I've had great success using imapsync. - Source: Reddit / 4 months ago
Are there any pros/cons to using mbsync over imapsync out of curiosity? Only ask as I've seen imapsync recommended in many places. https://imapsync.lamiral.info/. - Source: Hacker News / 4 months ago
audriga Email and Groupware migration - Easily migrate your email, contacts, calendar items and tasks to your new provider or server. No software installation is required.
OfflineIMAP - OfflineImap synchronizes email between an IMAP server and a MailDir or between two IMAP servers.
MailStore - MailStore Home - A 100% free single-private-user desktop solution
Yippie Move - The world's best email transfer tool
iSync - iSync is a software application published by Apple Inc.
IMAPSize - IMAPSize