Overview
MailerSend and Mailchimp serve different purposes. MailerSend specializes in transactional email with verification. Mailchimp is a full marketing platform. They're not direct competitors.
Different Purposes
MailerSend sends password resets, receipts, and notifications. Mailchimp sends marketing campaigns, newsletters, and automations. If you need both, you'd use MailerSend + Mailchimp (or Mandrill).
Email Verification
MailerSend includes email verification. Mailchimp doesn't. For transactional with validated addresses, MailerSend is more complete.
Marketing Features
Mailchimp has landing pages, CRM, e-commerce integrations, and full automation. MailerSend is transactional-only and suggests MailerLite for marketing.
For SaaS Companies
Neither offers unified transactional + marketing with Stripe. Sequenzy offers Stripe integration with both transactional and marketing in one platform.
Making the Choice
Use MailerSend for transactional email. Use Mailchimp for marketing. Or use Sequenzy for unified SaaS email with Stripe integration.