The verdict
If you run an online store and want purchase and browsing behaviour to drive your email and SMS, pick Klaviyo. Building that yourself in a general automation tool would be slow, and you would lose segments and revenue reporting. If you are a small B2B team with no store, Klaviyo has no deals pipeline or account view, and most of it would sit unused. In that case pick Make for connecting your forms, CRM, chat and sheets. Many stores will end up with both over time. Start with Klaviyo for the customer messaging and add Make when you hit a hand-off that no tool covers.