Migrate Mailchimp to AWeber without losing data

Mailchimp's pricing has pushed a lot of people to look around, but the fear of breaking a sign-up form, losing subscriber history or fighting DNS records keeps plenty of them paying more than they need to.

Moving to AWeber is less painful than that fear suggests, partly because AWeber will do it for you: its migration team moves subscribers, tags, forms and templates at no charge. If you'd rather do it yourself, a straightforward list takes an afternoon. Either way, two things don't transfer and need rebuilding by hand: automation history and any branching logic in your Mailchimp customer journeys. This guide covers both routes, the prep that makes either one go smoothly, and the mistakes that cause trouble afterwards.

Before you start: take an inventory

Spend ten minutes listing what you actually use in Mailchimp, because it decides how long the move takes. Note each audience and its subscriber count, the tags and groups you rely on, any custom fields (merge fields) beyond name and email, the sign-up forms and where they're embedded, your active automations or journeys, and the templates you'd want to keep. Most small accounts turn out to have one audience, a handful of tags, one embedded form and a welcome email, which is a quick move. Several audiences with overlapping subscribers take more thought, because in AWeber you'll usually want one list with tags rather than several lists that count the same person twice.

Option A: let AWeber's team handle it

If an afternoon of CSV exports doesn't appeal, this is the easier path, and it's free rather than a paid add-on. Sign up for AWeber and request a migration; depending on what you're moving, you'll either give the team access to export from Mailchimp or provide the export yourself. They import your contacts with tags and custom fields intact, rebuild your email templates as closely as the two editors allow, and recreate your sign-up forms so you only need to swap the embed codes on your site.

Review the finished migration line by line before you cancel Mailchimp rather than rubber-stamping it. Check the subscriber count, spot-check a few contacts' tags and fields, and send yourself a test from each rebuilt template. Then rebuild your automations as AWeber campaigns, which no migration route does for you.

Option B: do it yourself

If you'd rather stay hands-on, or want to clean things up on the way rather than carrying years of mess across, the DIY route below works well for most lists.

Step 1: export from Mailchimp

Go to Audience → All contacts, click Export Audience and download the file. The export comes as a zip with separate files for subscribed, unsubscribed and cleaned (bounced) contacts. Import only the subscribed file. Open it first and check that tags and custom columns came through; grouped tags sometimes arrive flattened into a single messy column that needs splitting in a spreadsheet before import.

Step 2: import into AWeber

In AWeber, go to Subscribers → Add Subscribers → Import Multiple and upload the CSV (XLS, XLSX, TSV and TXT also work). Map every column deliberately: email, first name, tags and any custom fields such as phone number or customer type. A skipped column silently drops that data rather than raising an error. When AWeber asks how these subscribers joined, describe your existing Mailchimp forms honestly. AWeber supports importing an existing opted-in list without asking everyone to confirm again, which is a big practical advantage over starting fresh. Large imports can be held briefly for a review of where the list came from; that's normal and usually quick.

Step 3: authenticate your domain

Gmail and Yahoo won't trust an unauthenticated sending domain, so this isn't optional. Under your account settings, open Domains and Addresses, add and verify your From address, then click Setup Instructions next to your domain. You'll get three CNAME records for DKIM to add at your DNS host (GoDaddy, Namecheap, Cloudflare or wherever your domain lives). Back in AWeber, click Refresh; green ticks mean they're working. Propagation can take from minutes to a day, so do this first, before you need to send. If your domain already has a DMARC record from the Mailchimp days, keep it.

Step 4: swap your sign-up forms

Rebuild your forms in AWeber's sign-up form or landing page tool with the same fields, set each form to apply the right tag, and replace the old Mailchimp embed codes on your site. Leave the Mailchimp form live for a day or two after switching in case a cached page still serves the old code, then check Mailchimp for any stragglers and import them.

Step 5: rebuild automations

Recreate your welcome email and any sequences as AWeber campaigns triggered by tags. A Mailchimp journey with branches becomes two or three simpler campaigns that hand subscribers between them with tags. Our guide to building an AWeber welcome sequence shows the pattern. Don't import existing subscribers into a welcome campaign by accident; start the campaign's trigger from the new form's tag, not the import tag.

Your first sends from the new account

A new sending setup has no history with inbox providers, so ease in. Send your first campaign to the people who opened or clicked most recently, then widen to the full list over the next two or three sends. Keep your sender name and From address the same as before so readers recognise you. Mention the change in a line at the top of the first email so nobody is confused by a slightly different look.

When a step doesn't behave

• The import count is lower than the file. AWeber skips duplicates and malformed addresses. Compare counts, and check that the file you imported was the subscribed one, not the combined export.
• Tags didn't come across. The tag column wasn't mapped, or Mailchimp exported tags in a format AWeber didn't read. Fix the column in a spreadsheet and re-import with tagging; existing subscribers are updated rather than duplicated.
• The DKIM ticks stay grey. Usually a record was pasted with the domain name doubled (some DNS hosts add your domain automatically). Compare the host field with what AWeber shows.
• Anything else. AWeber's chat support is open around the clock and deals with migrations every day; it's quicker than guessing.

Closing Mailchimp

Once a couple of campaigns have gone out from AWeber without problems, export your Mailchimp audience one last time as an archive, then downgrade or close the account so you stop paying for it. Mailchimp bills on all contacts in your audience, so running both platforms in parallel for longer than you need to costs real money.