What are some alternatives?
When comparing Should I Make This? and Landing Pages in MailChimp, you can also consider the following products
Carrd - Simple, responsive one-page site creator.
Ship - Fast, native issue tracking for software projects
Landing Pages by Viral Loops - Easily create a landing page for your referral campaign ✌️
Best Referral Programs - A curated directory of startup referral programs
SaaS Pages - 900+ Screenshots of the best SaaS landing pages
Cominsoon - Build coming soon page to get early feedback