Migrating from Mailchimp to MarketingAtelier: the guide

Leaving Mailchimp feels risky: people worry about losing their contacts, their consent or their email templates. In reality, a well-prepared migration takes only a few hours. This guide lays out the step-by-step method to move your activity to MarketingAtelier — a French platform, hosted in Europe and GDPR-compliant by default — without breaking anything and without interrupting your sends.

Why migrate from Mailchimp?

Pricing that climbs fast

Mailchimp bills by number of contacts, and the bill rises quickly as your list grows or as you switch on advanced features. For a European SMB or agency, the monthly cost often ends up higher than that of an all-in-one platform that also covers CRM, forms and pages.

Data hosted outside Europe

Mailchimp is a US company subject to the Cloud Act. For a brand collecting contacts in Europe, hosting data in Europe and holding traceable, granular consent is no longer a nice-to-have but an obligation. MarketingAtelier applies GDPR by default: proof of consent, anonymisation, consent per channel.

The migration checklist, step by step

Follow these six steps in order. Each relies on a native feature of the platform, with no third-party tool required.

1. Export from Mailchimp

In Mailchimp, open your audience and run an export. Make sure to include the status column (subscribed, unsubscribed, pending): that column carries the consent. Download the file in CSV format.

2. Import into the CRM

In CRMAtelier, the smart CSV import detects your columns and suggests a mapping to the standard fields (email, first name, last name) and your custom fields. Map the status column too: unsubscribed contacts stay unsubscribed, and their opt-in proof is kept. You start from a clean, compliant list.

3. Recreate audiences and segments

Rebuild your Mailchimp segments as audiences in the CRM — static (fixed lists) or dynamic (rules on tags, score or fields). Because every module shares the same contacts, these audiences will also serve your forms, campaigns and automations.

4. Recreate your templates with AI

No need to rebuild your templates by hand. In MailAtelier, AI generation starts from a simple brief or your website URL to produce an email in your brand style. Focus on your two or three most-used templates: this is where the migration saves the most time.

5. Configure sending

Two options via SendAtelier. Either native sending, hosted in Europe, once your domain is verified (DNS records). Or, for a gradual transition, connect an existing ESP account (Mailchimp, Brevo, Mailjet, SendGrid): you keep sending through that account while you switch over at your own pace.

6. Test before switching

Send yourself a test campaign, check the rendering on mobile and desktop, verify the links and the unsubscribe footer, then launch your first real campaign on a small segment before rolling it out widely.

Pitfalls to avoid

• Losing consent: always export and map the status column, otherwise you start from scratch on the GDPR side.
• Ignoring unsubscribes: a contact who unsubscribed in Mailchimp must stay that way. The import preserves this status — don't force it back to "subscribed".
• Migrating everything at once: start with your key audiences and templates, test, then expand.
• Forgetting domain verification: without DNS authentication, your emails risk landing in spam. Do it before your first native send.

A gradual or immediate transition

Nothing forces you to cut everything over on day one. You can import your contacts into the CRM, recreate your templates and keep sending through your Mailchimp account connected to SendAtelier, then switch to native sending once your domain is verified and your campaigns tested. The switch then happens with no disruption for your subscribers.

To go further, read our MarketingAtelier vs Mailchimp comparison, or explore the smart CSV import and the AI template generation in detail.

Compare the plans or create a free account to import your first contacts and generate an email in two minutes.