is heavier. It requires more server resources for the same volume. Historically, users report slowdowns past 500k subscribers without heavy optimization.
Two legends have dominated this space for years: and Interspire Email Marketer . mailwizz vs interspire
When most people think of email marketing, they think of SaaS giants like Mailchimp or Klaviyo. But for those in the know—agencies, affiliate marketers, and privacy-conscious businesses—the real power lies in self-hosted platforms. is heavier