This would be true if Mailchimp had a competitive advantage in deliverability, which they don’t. Source: I have evaluated Mailchimp as an ESP several times and

This would be true if Mailchimp had a competitive advantage in deliverability, which they don’t. Source: I have evaluated Mailchimp as an ESP several times and selected competitors. None of the ESPs beat our corporate email system on deliverability BTW. They did make it a lot easier to manage email programs, though. Edit to add, I’m sure IP reputation management is a challenge if your business model is to allow anyone to sign up for free and start sending. Paying clients don’t care about that, though. Deliverability is something you can buy from lots of people. And for small folks, you’re not going to beat the deliverability of Gmail. It’s table stakes IMO. There’s a reason Mailchimp sells itself as a marketing software platform and not “we deliver emails”.