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AI agents test Amazon ads, measure their real sales impact with holdout tests, and log what works for brands selling on Amazon and Meta.

The story

Screenshot of the Spillmark homepage
spillmark.com, as visitors see it

Spillmark is an AI-powered platform for Amazon sellers that automates testing and measurement of advertising performance. The platform uses AI agents to pull data from Seller Central, Amazon Ads, Meta and Shopify, run holdout tests to measure actual sales lift from Meta ads on Amazon, and flag problems as they occur.

Unlike attribution models used by Meta and Amazon that assign credit based on clicks or impressions, Spillmark measures causation through geo-based holdout tests that pause ads in selected regions for 4 to 12 weeks and compare sales changes against unpaused regions. This reveals the true incremental sales generated by ad spend.

The platform shows profit by channel after accounting for Amazon fees, product costs and ad spend. Users can view all calculations and data sources behind every number, with tests locked before starting and results never edited after. All data is kept private and never pooled or shared with other brands.

Signature features

  • Holdout testing for measuring true ad lift with statistical ranges
  • Profit dashboard showing earnings by channel after fees and costs
  • Read-only access with no automatic changes to ad accounts
  • Locked experiment designs that cannot be edited after starting
  • Pre-test checks showing whether tests can deliver clear answers
  • Alert notifications for detected problems and issues
  • Branded Amazon PPC tests on Growth plan

Pricing

Pricing model: Paid

Dashboard $19/mo, Starter $49/mo (for brands spending up to $3k a month on Meta), Growth $199/mo (for brands spending over $3k a month on Meta)

Spillmark particulars

From
Monterey, United States
Website
spillmark.com
Admired by
0 members

Spillmark metrics

Valuation of spillmark.com: Ahrefs Domain Rating and Majestic link data, with the change since the last appraisal.

  • 0 Domain Rating no change since last check
  • 0 Trust Flow no change since last check
  • 0 Citation Flow no change since last check
  • 0 Referring domains no change since last check
  • 0 External backlinks no change since last check

Ahrefs Domain Rating valued 26 Oct 2026, reappraised 26 Oct 2026. Majestic valued 26 Oct 2026, reappraised 26 Oct 2026. Majestic appraises the link data. Trust Flow, Citation Flow and Topical Trust Flow are trademarks of Majestic-12 Ltd.

Spillmark's domain pedigree

Trace the pedigree

Checked 26 Oct 2026, 07:50 UTC against the registry's public RDAP data.

  • Domain age 16 days
  • Registered
  • Expires
  • Registrar NameCheap, Inc.
  • DNSSEC Not signed

Full pedigree of spillmark.com

Questions

Is my data safe?
Spillmark requests read-only access and never stores buyer names or addresses. Data is never shared with other brands. Users can disconnect anytime, and data is deleted within 30 days, or deleted immediately from Settings.
How long until I get an answer?
Users see profit by channel immediately after reports are imported. A holdout test runs for 4 to 12 weeks, and Spillmark tells you how long yours needs before it starts.
Will it change my ads?
Spillmark does not change ads on its own. It plans the test and shows what to change, and nothing changes without user approval.
What does it cost, and what do I get for $19?
$19 a month gets the dashboard, imports and profit by channel. Holdout tests start on the Starter plan.
Can I switch plans?
Yes, you can switch plans anytime from Settings. Changes apply from the next billing month. If Meta spend goes over a plan's limit, the platform notifies you and suggests the right plan.

More on this profile

Spillmark has a free listing. The owner can unlock the full profile with a paid launch for $5:

  • Founder story (locked)
  • Milestones (locked)
  • Demo video (locked)
  • Dofollow website link (locked)

The founders

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