Thanks for sharing this thought with the community!
Klaviyo currently has thousands of customers here on the community forum who are actively using Klaviyo to market their products!
Can you tell us if you are a current Klaviyo user, just exploring the forum or have any insight to share on your goals? We’re interested to learn more about you and your business!
I recommend checking out our article on using Klaviyo’s API for custom integrations. With respect to segmentation, I would check out this section of the article specifically which speaks to data structure for segmentation and flow filters. I also encourage you to explore our custom platforms & API help center documentation which includes custom platform tutorials, how-tos and I’m also including a link to our API documentation.