Brevo doesn't charge by how many contacts you have. It charges by how many emails you actually send. That one structural difference from Mailchimp's contact-based pricing is the whole story behind why some businesses pay a fraction of what they'd pay elsewhere, and why others get confused comparing the two platforms on price alone.
The core model: volume, not contacts
Brevo's free tier allows 300 emails per day with unlimited contacts stored at no cost. That's a genuinely different offer than Mailchimp's free tier, which caps out at 500 total contacts regardless of how often you email them. A business building a large list it doesn't email constantly, a newsletter with occasional sends, a re-engagement list, a dormant customer base, stores all of it free on Brevo while Mailchimp would force an upgrade well before reaching real send volume.
Starter costs $25/month for 20,000 emails per month with no daily send limit, plus basic reporting and email support. Business runs $65/month and adds marketing automation, A/B testing, advanced statistics, and multi-user access. Enterprise is custom-priced for unlimited contacts and sends, sub-account management, advanced integrations, and a dedicated IP address.
The practical effect: a business with 50,000 stored contacts that only emails twice a month pays for send volume, not list size. On a contact-based platform, that same list could push into a much higher tier regardless of how rarely it's actually used.
Where volume-based pricing gets expensive
The tradeoff flips for high-frequency senders. A business emailing its list daily or running frequent automated sequences burns through the 20,000-email Starter allowance fast, and moving up to Business's higher volume, or beyond into custom Enterprise territory, can end up costing more than a comparable contact-based plan would for the same list size. Volume-based pricing rewards infrequent senders with large lists and penalizes frequent senders, the exact inverse of contact-based models like Mailchimp, which reward small, frequently-emailed lists and penalize large ones regardless of send frequency.
The right way to estimate real cost is multiplying actual monthly send volume, not list size, against the tier that covers it. A 10,000-contact list emailed twice a month sends roughly 20,000 emails and fits Starter comfortably. The same list emailed daily sends over 300,000 a month, a volume that pushes well past Business into Enterprise territory with custom pricing.
What each tier actually includes beyond the email cap
Free tier access includes email templates and a basic CRM alongside the 300-emails-a-day allowance, which is enough to run a real small newsletter or personal project without paying anything, as long as daily volume stays under the cap.
Starter's email support and basic reporting cover the fundamentals but lack the deeper automation the platform is built around. Business is where Brevo's actual differentiators activate: multi-step automation sequences with event triggers, A/B testing for subject lines and content, and advanced statistics that go beyond open and click rates. For any team running real lifecycle marketing, welcome sequences, cart abandonment, re-engagement campaigns, Business is effectively the entry point, not Starter.
Brevo also bundles SMS, WhatsApp campaigns, live chat, and a basic CRM into the same platform across paid tiers, and transactional email (order confirmations, password resets, receipts) runs through the same account as marketing email. That consolidation is a real cost saver for teams currently paying for a separate transactional email service on top of their marketing platform.
Real cost for different sending patterns
A small business with 5,000 contacts sending a weekly newsletter: roughly 20,000 emails a month, landing exactly at Starter's $25/month ceiling. The same list on Mailchimp's contact-based Standard plan would run notably higher for a 5,000-contact list, since Mailchimp prices by list size, not send frequency.
A growing SaaS company with 15,000 contacts running welcome sequences, weekly newsletters, and re-engagement campaigns: total monthly volume lands well into Business territory at $65/month, justified by the automation and A/B testing the growth marketing actually needs, not just the raw email count.
An e-commerce business with 40,000 contacts sending daily promotional emails: volume easily exceeds 1 million emails a month, requiring custom Enterprise pricing. At that sending frequency, it's worth directly comparing Brevo's Enterprise quote against a contact-based platform's equivalent tier rather than assuming either model is automatically cheaper.
Switching from a contact-based platform
Moving from Mailchimp or a similar contact-based platform to Brevo means recalculating cost from scratch rather than assuming a like-for-like tier match. A team that outgrew Mailchimp because of list size alone, not send frequency, is exactly the profile that benefits most from switching, since the same list that triggered a Mailchimp upgrade might sit comfortably on Brevo's free tier or Starter depending on how often it actually gets emailed. Pulling the last three months of actual send counts before migrating gives a far more accurate cost comparison than comparing list sizes or feature lists alone.
What actually breaks in practice
Reddit feedback on Brevo consistently flags two real weaknesses: the email template editor is functional but clunky compared to Mailchimp's more polished drag-and-drop builder, and customer support response times on Starter and below can be slow, generally email-only with real waits. Neither is a dealbreaker, but both are worth weighing against the pricing advantage, especially for teams that expect to need frequent support during setup.
Deliverability gets mentioned as inconsistent in some user reports, though this varies by sending practices and list hygiene as much as by platform. Teams migrating from another platform should monitor deliverability closely during the transition rather than assuming parity automatically.
The EU data residency angle
Brevo, formerly Sendinblue, is a French company with EU-hosted data infrastructure and a GDPR-first architecture built from the ground up rather than retrofitted for compliance. For European businesses or any company handling EU customer data, that's a real practical advantage beyond pricing, since it simplifies compliance conversations that would otherwise require additional data processing agreements with a US-hosted platform.
What changed and why the old numbers still float around
Brevo was called Sendinblue until its 2023 rebrand, and older pricing figures from that era, lower Starter and Business rates in particular, still circulate in older comparison posts, forum threads, and even some of the company's own older documentation that didn't get fully updated. Anyone researching Brevo pricing who runs across a $9/month Starter figure or an $18/month Business figure is likely looking at pre-rebrand or otherwise outdated pricing rather than the current $25/$65 structure. It's worth double-checking the publish date on any Brevo pricing comparison before trusting the numbers, since this platform's pricing has genuinely moved since the Sendinblue era, not just been renamed.
The free tier's core offer, 300 emails a day with unlimited stored contacts, has stayed consistent through the rebrand and remains the platform's clearest differentiator against contact-capped competitors. That part of the pricing story hasn't shifted even as the paid tier numbers have.
Is Brevo's pricing model worth it
For businesses with large, infrequently-emailed lists, the free and Starter tiers deliver real savings over contact-based competitors, often significant enough to justify tolerating a less polished editor. For frequent senders with smaller lists, the math should be run explicitly rather than assumed: volume-based pricing isn't universally cheaper, it's cheaper specifically for the send pattern it was designed around.
The practical first step for anyone evaluating Brevo against a contact-based alternative is calculating actual monthly email volume, not contact count, and comparing that number against Brevo's tier thresholds directly. The free tier costs nothing to test this against real sending patterns before committing to either model.