Easy integrating, migration, automations, and low cost all make Klaviyo a top contender...
How MOON built a beautiful and effective e-commerce site using Webflow and integrating with Shopify
Alamo Drafthouse sent out a short survey monkey quiz over email and completely changed my opinion about going out to the movies. They were able to clearly showcase the different methods they're considering to keep people safe while polling their customers at the same time.
Here's a list of the books I can read over and over again and hopefully you can too