Zap account migration options
Zap, Mistpark, Osada, Redmatrix, and Roadhouse: full data import, synchronisation with new content, and nomadic identity
Hubzilla: full data import/migration, but not currently synchronised (possibly in the future). Not all of the available Hubzilla protocols and services are supported in Zap.
Friendica: Basic channel and profile import, attempt to re-connect with compatible connections. No content import currently (*).
Mastodon, Pleroma, Pixelfed and everything else: Attempt to connect to everybody in follower/following list and/or CSV export file via the "followlist" addon. No content import currently (*).
(*) This is on the roadmap for mid-2021.
