Recommendations for software that will let me segment customers based on stripe or shopify data?

The company I work for uses Klaviyo. It's got a bunch of fields and if/then logic that you can combine to segment people and set up automated email campaigns. Pretty easy to learn, integrates with shopify. It's also got a drag-and-drop email designer with a bunch of templates and the ability to add your own.

I don't have a specific segmentation methodology, but was thinking some sort of quantitative-driven clustering based on the sales data from stripe or elsewhere.

Could you share a more specific request? How exactly do you want to segment it?

You can pull just about any data with zapier and send it anywhere you want including very basic spreadsheets. Some zaps are free if I'm not mistaken.

Do you use any analytics (Mixpanel, Kiss, Heap etc) / CRM (Intercom, Drift) software?