Mailchimp to Kit Migration: Keep Segments and Automations

The moment that triggers a Mailchimp to Kit migration is almost always the same. You open Mailchimp’s pricing page after they bump your tier, do the math, and realize you are paying for a list tool when you actually need a creator-oriented automation platform. Or you try to build a sequence that branches on purchase behavior and hit Mailchimp’s wall. Either way, the fear is not about leaving Mailchimp. It is about the three years of segments, tags, and automation logic sitting inside it.

Before you migrate

Do not touch Kit until this checklist is done. Skipping prep is how you arrive at Kit with a flat CSV and no idea which contacts were in your welcome series.

• Audit your Mailchimp account. List every active automation, its trigger, and its branch logic. Screenshot each journey. Mailchimp does not export automation logic in any usable format, so screenshots are your source of truth.
• Identify every segment. Go to Audience > Segments and write down the segment name, the conditions, and the approximate contact count. You will export each one as a separate CSV.
• Map your merge fields. Open Settings > Audience fields and note every custom merge field beyond FNAME, LNAME, and EMAIL. You will create matching custom fields in Kit before importing.
• Pause sequences that are mid-flight. Any subscriber currently inside a Mailchimp automation journey should finish or be manually exited before you move them. Moving a contact mid-sequence creates duplicate touch problems.
• Verify your sending domain. You will re-authenticate SPF and DKIM inside Kit. Pull your current DNS records from your registrar now so you have them ready.
• Grab your suppression list. Export unsubscribes and bounces from Mailchimp. Kit calls them “cold subscribers.” Suppress these on import to protect deliverability.

What breaks and what does not transfer

Mailchimp and Kit have genuinely different data models. Some things port cleanly. Others need a workaround. I’ve mapped out the four problem areas that trip people up every time.

{
  "trigger": "Shopify: Order Paid webhook",
  "steps": [
    {
      "node": "HTTP Request",
      "method": "GET",
      "url": "https://api.kit.com/v4/subscribers",
      "params": { "email_address": "{{ $json.email }}" }
    },
    {
      "node": "HTTP Request",
      "method": "POST",
      "url": "https://api.kit.com/v4/tags/YOUR_TAG_ID/subscribers",
      "body": {
        "subscriber": {
          "email_address": "{{ $json.email }}"
        }
      }
    }
  ]
}

Expect the groups-to-tags mapping to be the step that takes the longest. Budget an extra hour if you have more than five Mailchimp groups with overlapping membership.

Verify it worked

Before you cancel Mailchimp, run through these four checks. Skip them and you will discover the problem six weeks later when a subscriber complains they stopped getting your newsletter.

1. Subscriber count matches. Pull total subscribers in Kit and compare against your Mailchimp export totals. A variance of more than 2 percent means a failed import row. Re-check that CSV for formatting errors.
2. Tags are populated correctly. Pick three contacts you know were in a specific Mailchimp segment. Confirm they have the corresponding Kit tag. If they do not, the import mapping failed for that file.
3. Sequences fire on trigger. Add a fresh test email address, submit it through your live opt-in form, and confirm the welcome sequence starts within five minutes. Check the sequence activity log in Kit to see each step fire.
4. Custom fields render in emails. Open a sent test email from Kit and confirm the merge values populated. Empty fields almost always mean the CSV column header did not match the custom field key exactly.

Should you switch, or stay?

Choose Kit if

• You sell digital products, courses, or newsletters and want purchase-driven segmentation
• Your automation logic branches on subscriber behavior, not just send dates
• You want a cleaner UI and are willing to rebuild journeys from scratch for a better long-term foundation

Free to 10k subscribers, then from $25/mo Try Kit free →

Choose ActiveCampaign if

• You need CRM-level deal pipelines alongside email sequences in one platform
• Your sequences are deeply conditional with lead scoring logic baked in
• You are migrating from Mailchimp but want to import automation logic more directly

From $15/mo (Starter), $49/mo (Plus) for automation Try ActiveCampaign →

Choose Brevo if

• You want transactional email and marketing sequences in one platform at a lower price point
• Your list is large but your automation complexity is low
• You need SMS marketing alongside email

Free to 300/day, Starter from $9/mo Try Brevo →

If you are evaluating the broader Mailchimp exit and want to compare how this migration stacks up against moving to ActiveCampaign, there is a full rundown on migrating Mailchimp to ActiveCampaign without losing segments. If you are coming from GetResponse rather than Mailchimp, the GetResponse to Kit migration guide covers the same steps with GetResponse-specific gotchas.

The migration is the easy part

The hard part is deciding to do it. Once you have the CSVs exported, the custom fields mapped, and the sequences documented, the actual Kit setup takes less time than you expect. Kit is genuinely well-designed for creator and B2B content workflows, and the visual sequence builder makes Mailchimp’s classic automation editor feel like it was designed in 2014 (because it was). Give yourself a week of parallel running, verify the four checks above, and then let Mailchimp’s subscription lapse with confidence.