Amazon Attribution Alternative for Incrementality

Amazon Attribution is free and useful. It reports clicks, detail page views, add-to-carts and purchases from tagged links, using a 14-day, last-touch model. But a credited sale may have happened anyway, and shoppers who saw an ad and searched later are missed.

Spillmark answers a different question: what would you lose if you stopped? It uses a geo holdout and reports lift with a range. Keep Amazon Attribution for click credit; use Spillmark for cause.

Attribution stays the right report for tagged clicks, detail page views, and purchases inside 14 days. It will not tell you which of those purchases would have happened anyway. Regions without Meta still buy from search, email, and habit, and the holdout counts those orders too.

1. Upload your reports, or connect. Start with the Seller Central, Amazon Ads, Meta and Shopify reports you already download, or connect with read-only access.
2. See profit by channel. Agents show sales minus Amazon fees, product costs and ad spend, with the math behind every number.
3. Plan a holdout you approve. Spillmark checks your order history to see whether a geo holdout can answer at your size. If it can, agents plan a test that pauses Meta in a few US states for 4 to 12 weeks and compares Amazon orders by ship-to state. Nothing pauses without your approval, and each test design is locked before it starts.

• Dashboard (free): report imports, profit by channel, and a pre-test check.
• Starter ($49/mo): for brands doing $0–$50k a month on Amazon. One holdout test at a time, locked experiment ledger, alerts.
• Growth ($199/mo): for brands doing $50k+ a month. Unlimited holdout tests, branded Amazon PPC tests, scored predictions.

Paid plans start with a 7-day trial for $0. Cancel anytime. Check current prices on spillmark.com.