Best Attribution Software for Companies Spending Over $100k/Month on Ads

At this spend level, the best attribution software is built on a dedicated data warehouse, not just platform pixels. It blends Amazon, Shopify, Meta, Google, and GA4 data into one model, lets you compare attribution methodologies side by side, and refreshes in something close to real time. Anything less, and you're making five-figure daily budget calls on numbers you can't fully trust.