Mailchimp and Brevo sit at opposite ends of the email-platform question most teams actually ask: what am I billed for? Mailchimp, the long-standing SMB suite, prices by the contacts you store. Brevo, the French vendor formerly known as Sendinblue, prices by the emails you send and stores unlimited contacts for free. That single axis reshapes everything downstream, from how you treat a dormant list to whether transactional and marketing mail live in one account.
This guide compares the two on the rows that matter in evaluation: automation and journey depth, segmentation and CRM, customer-data posture, deliverability and transactional tooling, published pricing models, and ecommerce integrations. It closes with which wins by list size and vertical, and when the right answer is a wider platform than either. For Orbit's own head-to-heads against each vendor, see Orbit vs Mailchimp and Orbit vs Brevo.
The short version
| If your program is... | Start with... | Why |
|---|---|---|
| A large list with a high dormant share | Brevo | Unlimited stored contacts; the bill tracks sends, not list hygiene you have not done yet. |
| Template-led SMB marketing with a light CRM | Mailchimp | Template depth, ready-made journeys, and a built-in CRM suit general marketing teams. |
| Marketing and transactional email in one account | Brevo | SMTP relay and API transactional sending sit beside the campaign studio; Mailchimp's transactional path is Mandrill, a separate paid add-on. |
| Email plus channels neither runs natively (WhatsApp beyond add-ons, voice, contact center) | Neither alone | Treat those as separate requirements; see the wider-platform section below. |
1. Automation and journey depth
Mailchimp's customer journey builder covers multi-step automation with branching and a deep library of prebuilt templates: welcome series, abandoned cart, re-engagement, birthday and anniversary mail. For a campaign-led team the templates are the product; a competent lifecycle program can be assembled in an afternoon.
Brevo's journey automation covers the same multi-step shape (triggers, conditions, delays, A/B splits) and adds the longevity of its transactional heritage: order confirmations, shipping notices, and other API-triggered mail can feed the same journey logic as marketing mail, because both live in one account. Teams whose lifecycle starts with a transactional event (first order, password reset, invoice paid) get that handoff without an integration layer.
The honest read: for pure marketing automation depth the two are close, with Mailchimp ahead on ready-made starting points and Brevo ahead where transactional events are the natural triggers.
2. Segmentation and CRM
Mailchimp segments run over audience fields (tags, groups, merge fields, engagement) and its built-in CRM adds contact records for non-buyer relationships. The CRM is light but native, which matters for service businesses tracking conversations beside campaigns.
Brevo pairs contact segmentation (lists, custom attributes, engagement conditions) with Brevo CRM, a separate free sales-CRM product, and a shared inbox for conversations. The seams show where the products meet (a CRM deal updating a marketing segment takes configuration), but the pieces exist and are priced accessibly.
Neither segmentation layer reaches the commerce-event depth of a specialist ecommerce platform; if segments must key off cart and catalog behavior, evaluate the storefront connectors in section 6 before the segment builder.
3. Customer data posture
The billing model is the data posture. Brevo's unlimited-contacts pricing means the stored record is not a cost center: teams keep full history, lapsed subscribers, and cold leads without a tier penalty, which changes list-hygiene behavior in ways that show up years later in reactivation campaigns.
Mailchimp's stored-contact tiers make list hygiene a monthly budget item. That pressure can be healthy (it forces suppression of dead addresses) or expensive (you pay to keep a list you are legally required to retain but never message).
Ask one data question in evaluation: where does my event history live, and how does it reach the profile? Both vendors ingest imported files and connected-app events; warehouse-native syncing is the row to verify against the current connector lists rather than assume.
4. Deliverability and transactional tooling
Both vendors publish SPF, DKIM, and DMARC alignment guidance for custom sending domains, warm up new IPs gradually, and report deliverability on sent mail, with dedicated IP options in higher tiers.
The structural difference is transactional mail. Brevo ships an SMTP relay and a transactional API inside the same account as the campaign studio, so order confirmations and password resets share the sender's authentication, reporting, and reputation tooling with marketing mail. Mailchimp's transactional sending runs through Mandrill, which requires a paid Mailchimp account and is billed separately; it is capable, but it is a second product with a second bill.
If your marketing and transactional mail should share one reputation and one dashboard, Brevo's shape is the simpler one. If your transactional volume is heavy enough to want its own specialist tooling anyway, compare the transactional lane separately; SendGrid vs Mailgun vs Orbit covers that row.
5. Published pricing models
Mailchimp publishes a ladder (Free, Essentials, Standard, Premium) keyed on stored contact counts, with monthly email allowances and overage charges above the tier. Contacts retained but never messaged occupy the tier.
Brevo publishes a ladder (Free, Starter, Business, Enterprise) keyed on emails sent per month or per day, with unlimited contacts on every tier and the free plan capped by a daily send limit plus Brevo branding.
Neither page is a quote for a real program. Model three months (typical, peak, quiet) against both: at a small, active list the contact tiers are cheap; at a large, dormant list the send-based model usually wins; in between, the email-allowance overages on the contact model and the daily-send caps on the send model decide it. Confirm the current sheets before presenting numbers internally, because both vendors revise tiers regularly.
6. Ecommerce integrations
Both vendors ship native connectors for the major storefronts (Shopify, WooCommerce, and friends) covering cart, order, and catalog sync, and both add commerce features on top: Mailchimp with product recommendations and retargeting through its integrations directory, Brevo with commerce plugins and conversation-led flows.
Two caveats apply. Mailchimp's Shopify pairing has not been continuous over the years (the companies split in 2019), so verify the current connector if that pairing is load-bearing. Brevo's commerce ecosystem is narrower than Mailchimp's directory overall; check the specific apps your stack runs before treating breadth as parity.
7. When each wins, by list size and vertical
Brevo wins on large, dormant-heavy lists (100,000+ stored contacts with a low active share), where unlimited-contact storage removes the tier penalty; on programs that mix transactional and marketing mail in one account; on EU-based teams that want a European vendor with EU data hosting options; and on price-sensitive mid-market senders whose volume fits the send-based ladder.
Mailchimp wins on broad SMB verticals (professional services, hospitality, nonprofits, creators, local retail) where template depth, the built-in CRM, and the Intuit small-business ecosystem carry weight; on small lists where the free and entry tiers are a cheap start; and on teams that value the largest integrations directory in the category.
At mid sizes with mixed dormancy (10,000 to 100,000 contacts), the answer follows the math in section 5 rather than the vertical. Run both quotes against your active share before reasoning about features.
8. When to look at a wider platform
Both vendors are solid choices for email-led programs, and both rent additional channels (SMS, WhatsApp) as add-ons or integrations rather than running them natively end to end. When the same customer journey also needs RCS, a voice call, or a contact-center queue, the add-on model turns into a vendor stack: separate consent records, separate delivery reports, separate bills.
Devotel Orbit is the alternative for that broader scope: a transactional and marketing email API beside native SMS, WhatsApp, RCS, voice, and video, with the engagement data from every channel on one customer record and one account. The Mailchimp comparison registry and the Brevo comparison registry lay out the row-by-row matrices, and Orbit vs Brevo covers the send-based-pricing angle head on. If email is the whole program, pick between Mailchimp and Brevo on the rows above — on the pricing axis they are the two ends of one ladder, and orbit-vs-klaviyo covers the per-active-profile end where commerce flows are the program; if the roadmap is omnichannel, add Orbit to the shortlist.
Frequently asked questions
Why do large dormant lists favor Brevo?
Because Brevo does not bill for stored contacts. A list of 200,000 addresses where 40,000 are active pays for the sends those 40,000 generate; on a contact-tier model the same list pays for all 200,000 until you delete or archive the rest.
Is Brevo's transactional email really in the same account?
Yes. The SMTP relay and transactional API ship beside the campaign studio, sharing authentication and reporting. Mailchimp's equivalent is Mandrill, a separate paid add-on on top of a paid Mailchimp plan.
Which is better for EU data residency?
Brevo is a French company with EU hosting options, which simplifies the residency conversation for EU teams. Mailchimp is US-headquartered within Intuit; EU teams typically rely on its regional data-center options and contractual safeguards. Verify the current residency offerings against your processor requirements.
Can we migrate from Mailchimp to Brevo without downtime?
Yes, with the standard slice migration: export contacts with consent records, import into Brevo, re-authenticate your sending domain, run a holdout on the old platform while the new one warms, then cut over. Rebuild automations before cutover; journey logic does not transfer automatically between any two platforms.
Where does Devotel Orbit fit?
Orbit is not a like-for-like replacement for either vendor's campaign studio. It is the wider platform when the journey continues into SMS, WhatsApp, voice, or the contact center: email API plus cross-channel engagement data on one account. The registry comparisons linked above carry the row-by-row detail.
Related comparisons
- Orbit vs Mailchimp — the contact-tier suite, row by row.
- Orbit vs Brevo — the send-based-pricing head-to-head.
- Mailchimp registry matrix and Brevo registry matrix — capability rows and caveats.
- SendGrid vs Mailgun vs Orbit — the transactional email lane.
Published 28 October 2026. Plan names, tier limits, and connector availability verified against Mailchimp's and Brevo's public pricing and product pages in October 2026; both vendors revise tiers regularly, so confirm the current sheets before modeling your bill.