Overview
Mandrill and Brevo take different approaches to email. Mandrill is a transactional add-on for Mailchimp. Brevo is a complete multi-channel platform with transactional built in. For our take on each, see our Mandrill comparison and Brevo comparison.
Brevo's Unified Advantage
Brevo includes transactional email, marketing campaigns, SMS, WhatsApp, CRM, and live chat - all in one platform starting free. Mandrill only does transactional and requires Mailchimp for everything else.
The Value Comparison
Brevo at $25/month replaces both Mailchimp ($20/month) and Mandrill ($10+/month). One platform, lower cost, more features. Unless you're deeply invested in Mailchimp's ecosystem, Brevo is better value.
Transactional vs Marketing Email Needs
Figuring out whether you need transactional email, marketing campaigns, or both settles this comparison quickly. Mandrill only handles transactional sending and requires an active Mailchimp subscription to use at all. Brevo includes transactional email on every plan alongside marketing, SMS, and WhatsApp, so it covers both needs without requiring a second product.
Deliverability and Sender Reputation
Deliverability for both tools comes down more to sending practices than the platform itself: proper SPF, DKIM, and DMARC setup, clean lists, and consistent sending volume matter regardless of provider. Mandrill benefits from Mailchimp's shared reputation infrastructure, while Brevo manages its own sending reputation across its larger, more diverse channel mix.
Migration Path and Switching Costs
Moving between Mandrill and Brevo means more than exporting a contact list. Templates, automations, and any Mailchimp-specific integrations built around Mandrill will need to be rebuilt in Brevo's system, and domain authentication records have to be updated and reverified, which can cause a temporary dip in sender reputation during the switch.
Use-case matchups
| Need | Better fit | Why |
|---|---|---|
| Mailchimp-connected transactional email | Mandrill | Mandrill is cited for API/SDK support, Mailchimp campaign integration, templates, and analytics. |
| Managed marketing plus transactional email, SMS, CRM, and WhatsApp | Brevo | Brevo is cited for transactional email on all plans, SMS, CRM, WhatsApp, free plan, and modern UI. |
| One tool for campaigns and transactional sends | Brevo | Mandrill is transactional only and requires Mailchimp. |
| SaaS marketing plus transactional email with Stripe | Sequenzy | Sequenzy is listed at $49/month with transactional plus marketing and Stripe integration. |
Pricing reality
Mandrill is listed at $30+/month for 50k emails plus Mailchimp Standard, around $40+/month total. Brevo is listed at $25/month for Business with marketing plus transactional email, automation, and unlimited contacts. Sequenzy is listed at $49/month for 60k emails (unlimited subscribers), with transactional plus marketing email and Stripe integration.
Brevo is cheaper at the cited level and broader as a managed platform. Mandrill makes more sense if Mailchimp is already the marketing source of truth.
Review signals
Mandrill reviews cited here highlight reliable email handling and fit for technical teams, with support responsiveness as a caution.
Brevo reviews cited here highlight good value, smooth onboarding, and a managed platform fit. The tradeoffs are vendor dependency and recurring subscription costs.
Best Fit by Transactional and Marketing Split
Best transactional email add-on for Mailchimp-heavy teams
Mandrill fits teams already committed to Mailchimp that only need a transactional add-on for receipts, password resets, or app notifications. It is strongest when the marketing stack is already Mailchimp and the team does not want to change systems.
Best unified platform for marketing and transactional email
Brevo is the better fit when the team wants campaigns, automations, transactional sending, SMS, WhatsApp, and contact management in one product. It works better when separating marketing and transactionals into add-ons creates operational friction.
Best SaaS lifecycle platform for subscription-triggered email
Sequenzy fits SaaS teams that need transactional, marketing, onboarding, billing, and retention emails tied to product and Stripe events. It is more focused when transactionals are part of the lifecycle, not just a sending add-on.
Migration checklist
- Export domains, templates, API keys, webhooks, suppressions, Mailchimp lists, Brevo lists, automations, CRM fields, SMS/WhatsApp settings, and transactional templates.
- If moving to Brevo, rebuild transactional templates, lists, automations, CRM fields, and multichannel settings.
- If moving to Mandrill, preserve Mailchimp campaign dependencies and map transactional templates to Mandrill merge syntax.
- Reconfigure SPF, DKIM, DMARC, return-path, sender identities, webhook endpoints, and unsubscribe handling.
- Test transactional sends, campaigns, bounces, suppressions, and automations before cutover.
Decision checklist
- Choose Mandrill if Mailchimp-native transactional email is the requirement.
- Choose Brevo if managed multichannel marketing plus transactional email matters more.
- Avoid Mandrill if you need a standalone marketing platform.
- Avoid Brevo if Mailchimp integration is non-negotiable.
- Choose Sequenzy if SaaS billing events should drive marketing and transactional email.
