From WYSIWYG to Revenue Orchestration
ConvertKit vs. Beehiiv vs. Substack
Mailchimp turned email from a custom production job into a repeatable self serve workflow, and that changed the economics of the whole category. Before tools like Mailchimp, sending a polished campaign often meant HTML work, design help, list wrangling, and manual testing. Once marketers could drag blocks into a template, press send, and do it again next week, email volume rose, budgets followed, and a broad ESP market formed that later split into specialist products for ecommerce, creators, and other niches.
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The key product shift was not just cheaper sending. It was cheaper creation. WYSIWYG templates let non technical marketers build image heavy, branded emails themselves, similar to how Canva let non designers make social graphics. That expanded the number of people inside a company who could publish email campaigns.
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Once rich email creation got easier, specialists could peel off segments that needed different workflows. Klaviyo went after ecommerce merchants, where emails tie to carts, orders, and product catalogs. ConvertKit went after creators, where the job is growing a list, segmenting fans, and selling products, sponsorships, or subscriptions off that audience.
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That history explains why creator newsletter tools now compete on monetization and networks, not basic sending. Beehiiv mixes SaaS with ads, ConvertKit adds recommendations and sponsor matching on top of subscriptions, and Substack moved from pure subscription take rate toward ads as well. The simple email editor became table stakes years ago.
The next layer of competition keeps moving away from email composition and toward revenue orchestration. The winning products are becoming systems that not only send the newsletter, but also bring in subscribers, match brands, track purchases, and increase earnings per reader. Mailchimp expanded the market by simplifying creation, and now the category is compounding through monetization and network effects.