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MIGRATION GUIDEBrevo's Mailchimp integration can run as a one-off migration or as an ongoing sync, which makes it the sane option if you want to move gradually instead of flipping a switch. Two field types do not survive the trip, and Brevo says so in its own documentation.
Our dossier is blunt about this. Brevo is genuinely best for businesses with large contact lists who email selectively and want to pay by send volume, not list size. On price: Free forever (300 emails/day, unlimited contacts); paid Starter from about $9/mo and Business from $18/mo, scaling by monthly send volume rather than contact count (2026).
The honest knock: Charging by sends rather than contacts is genuinely cheaper for big lists you email infrequently — but the free daily cap and add-on fees mean high-frequency senders should model their real send volume first.
These steps are summarised from Brevo’s own public documentation — we have not invented or embellished a single one. Read the source before you start, because vendors change their import tooling more often than they change their pricing page: Brevo Help Center — Mailchimp integration: import and update your contacts →
Open the Mailchimp integration in Brevo and authorise your Mailchimp account. The same integration handles both a one-time migration and a recurring sync, so you can run both platforms side by side during a transition.
The workflow walks you through choosing which Mailchimp contact lists to import and how the contact attributes map onto Brevo fields. This mapping screen is where migrations succeed or quietly break — do not click through it.
Choose a custom sync frequency if you want new and updated Mailchimp contacts to keep flowing into Brevo. The integration supports up to 1M contacts.
Every migration has friction. These are the documented ones — the things worth knowing before you start, not after:
The most useful thing we can tell you is when to stay put. Skip this migration if you email your whole list daily — the per-send model can flip from cheap to costly at high frequency. Beyond that: if your current setup works, your list is healthy and nobody on your team is complaining, a migration buys you a week of admin and a fresh set of unknowns. Switch because something specific is broken or expensive — a deliverability problem you can name, a bill that has outgrown the value, a feature you genuinely cannot get — not because a comparison page told you the grass was greener.
Try Brevo →Read the full Brevo review
Brevo's Mailchimp integration can run as a one-off migration or as an ongoing sync, which makes it the sane option if you want to move gradually instead of flipping a switch. The full step-by-step is on this page, summarised from Brevo's own documentation.
Address attributes cannot be synced. Mailchimp stores an address as a collection of separate fields (ZIP, street number and so on), and Brevo's documentation states this cannot come across. If you mail physical goods, export addresses separately.
Skip it if you email your whole list daily — the per-send model can flip from cheap to costly at high frequency. A migration is only worth it when the tool solves a problem that is already costing you real hours or revenue.
Charging by sends rather than contacts is genuinely cheaper for big lists you email infrequently — but the free daily cap and add-on fees mean high-frequency senders should model their real send volume first.
The review is the hub — everything we publish on Brevo hangs off it:
This guide is our researched assessment — not a paid placement, and not sponsored by either vendor. The migration steps are summarised from the destination vendor’s own public documentation, linked in full on this page. Some links are affiliate links: we may earn a commission if you sign up, at no extra cost to you, and it never changes the take. How we review →