We sent identical email through all four major platforms and scored setup time, API ergonomics, deliverability, and price. The results were not what the marketing pages promise.
A brand-new domain has zero reputation, and receivers treat that as suspicious by default. The four-week warmup schedule we use, the subdomain trick, and what to do when it goes wrong anyway.
Brevo bills by messages sent, Mailchimp bills by contacts stored. For a lot of real-world lists, that one difference decides the whole comparison.
They both send email, but they are built for completely different jobs. After running both for a year, here is the honest breakdown of where each one wins.