Klaviyo and Outplay are both email marketing platforms that help businesses grow their audiences and increase sales. The main difference between the two is that Outplay focuses more on web-based marketing, while Klaviyo primarily provides email marketing solutions. Outplay provides more comprehensive marketing solutions, including website optimization, content marketing, and influencer outreach, among many other services. Klaviyo, on the other hand, is an email-focused marketing platform that helps businesses create highly customized and effective email campaigns that are tailored to specific audiences. Klaviyo also allows businesses to track their campaigns and measure the results, making it easier to make adjustments or add additional features as needed. While Outplay offers solutions that are more comprehensive in scope, Klaviyo provides better support for email-focused marketing efforts.