SWITCH
Move the list without losing what it knows
Subscribers are easy to move; consent records, groups and automations are where migrations fail. These guides map what transfers, what does not, and what to test before cutover.

ActiveCampaign to GetResponse
Export by status, split the tag column, carry scores as a field and keep the export as your consent record.
ActiveCampaign to Moosend
Move contacts to a simpler tool, and decide up front which automation depth you give up.
Kit to MailerLite
Move subscribers, translate tags into groups and segments, and rebuild sequences from scratch.
Mailchimp to Brevo
Move the list, import your unsubscribes, and shift from paying per contact to paying per email.
Mailchimp to GetResponse
Move audiences into lists, split the tag column, and keep the consent file GetResponse cannot import.
Mailchimp to MailerLite
Move subscribers cleanly and rebuild the consent, tags and automations that do not travel.