Shopify's built-in reports tell you what sold. They don't tell you why, or which channel actually drove it. Once you're running paid spend across more than one platform, that gap turns into a real operating problem, and it's the reason so many founders start hunting for the best ecommerce analytics for Shopify brands somewhere around their first million in revenue.

This isn't another "analytics matters" primer. It's a shortlist: what breaks first, what to check before you buy, and where seven commonly evaluated tools actually differ.