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Migrate from Mailchimp to Brevo without losing consent data

Brevo can be a better fit when send volume matters more than total stored contacts. A safe migration must preserve consent and deliverability. Compare the current bill in Switch & Save before planning the move.

Export more than email addresses

Export subscribed, unsubscribed, cleaned and archived contacts separately. Keep signup timestamps, source, tags, language and any custom fields used by segmentation. An unsubscribe list is not disposable: it prevents accidentally emailing people who opted out.

Clean obvious duplicates, but do not turn an old database into a “subscribed” list simply because it can be imported. Map Mailchimp fields to Brevo attributes before uploading production contacts.

Rebuild the sending foundation

  1. Authenticate the sending domain with the records Brevo provides.
  2. Recreate lists, attributes and segments.
  3. Import the suppression data before active subscribers.
  4. Rebuild templates with test links and plain-text fallbacks.
  5. Recreate automations one at a time and verify their entry conditions.

Send internal tests, then a small engaged segment. Watch bounces, complaints and unsubscribes before expanding. Do not migrate the whole list and change the “from” domain simultaneously.

Choose by monthly sends

Brevo plans are generally organized around monthly email volume. Mailchimp pricing can depend more heavily on contact count. Put your actual sends — including automations — into the Brevo plan finder rather than choosing by list size alone.

Cutover and rollback

Keep Mailchimp read-only during validation. Pause equivalent campaigns there before scheduling them in Brevo, or recipients may get both. Preserve campaign reports and template exports for reference. If delivery quality changes sharply, pause the Brevo expansion and investigate authentication, list quality and content before continuing.

Once consent data, test sends and automations are verified, view Brevo through StackPick. StackPick may earn a commission at no extra cost to you.