Related Products
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About
Spillmark is a web-based marketing analytics and experimentation product for Amazon sellers using Meta ads. It combines data from Amazon Seller Central, Amazon Ads, Meta, and optionally Shopify through account connections or report imports to analyze sales, costs, fees, ad spend, and channel profit. Sellers can design and run geographic holdout tests that pause Meta ads in selected regions, then compare Amazon sales to estimate advertising's incremental effect. Results include uncertainty ranges and explanations of the calculations, alongside dashboards, alerts, and records of test designs. Connected-account access is read-only; the product does not change campaigns without seller approval. Spillmark also provides an MCP server and REST API for assistants and scripts. Brand-level measurement and recommendations are in private beta. Starter includes one active holdout test and alerts; Growth includes unlimited tests, live account connections when available, and branded Amazon PPC tests.
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About
Stella is a marketing-measurement platform built to give marketers clear, scientifically sound insight into which ads, campaigns, and media channels actually drive incremental revenue. It includes three core tools; Incrementality Testing, Always-On Incrementality, and Media Mix Modeling (MMM). With Incrementality Testing, Stella runs geo-holdout studies (or inverse holdouts) to compare performance between test and control regions, isolating the causal impact of your ads rather than relying on attribution alone. It automatically handles complex statistical analyses (causal inference, confidence intervals, MAPE/R² checks), letting you see what would have happened without a campaign and therefore revealing the true “lift” generated by each ad. Its Media Mix Modeling tool uses a proprietary Bayesian MMM to decompose historical marketing spend and external factors (like seasonality, promotions, holidays, weather, etc.) to estimate each channel’s contribution to sales.
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Platforms Supported
Windows
Not Supported
Mac
Not Supported
Linux
Not Supported
Cloud
Supported
On-Premises
Not Supported
iPhone
Not Supported
iPad
Not Supported
Android
Not Supported
Chromebook
Not Supported
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Platforms Supported
Windows
Not Supported
Mac
Not Supported
Linux
Not Supported
Cloud
Supported
On-Premises
Not Supported
iPhone
Not Supported
iPad
Not Supported
Android
Not Supported
Chromebook
Not Supported
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Audience
Amazon sellers
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Audience
Companies interested in a tool to measure the real business impact of their ad spend
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Support
Phone Support
Not Supported
24/7 Live Support
Supported
Online
Not Supported
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Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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API
Offers API
Supported
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API
Offers API
Not Supported
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Screenshots and Videos |
Screenshots and Videos |
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Pricing
$19/month
Dashboard costs $19/month. Starter costs $49/month for brands spending up to $3,000/month on Meta and includes one active holdout test, an experiment ledger, and alerts. Growth costs $199/month for brands spending over $3,000/month on Meta and includes unlimited holdout tests, live account connections when available, branded Amazon PPC tests, and scored predictions. All plans are billed monthly and can be canceled anytime.
Free Version
Not Supported
Free Trial
Supported
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Pricing
$2,000 per month
Free Version
Not Supported
Free Trial
Supported
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Reviews/
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Reviews/
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Training
Documentation
Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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Training
Documentation
Supported
Webinars
Not Supported
Live Online
Supported
In Person
Not Supported
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Company InformationSpillmark
Founded: 2026
United States
spillmark.com
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Company InformationStella
United States
www.stellaheystella.com
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Alternatives |
Alternatives |
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Categories |
Categories |
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Integrations
Amazon
Supported
Shopify
Supported
Amazon Ads
Supported
Amazon Seller Central
Supported
Google Cloud Platform
Not Supported
Meta AI
Not Supported
Meta Ads
Supported
Model Context Protocol (MCP)
Supported
Snowflake
Not Supported
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Integrations
Amazon
Supported
Shopify
Supported
Amazon Ads
Not Supported
Amazon Seller Central
Not Supported
Google Cloud Platform
Supported
Meta AI
Supported
Meta Ads
Not Supported
Model Context Protocol (MCP)
Not Supported
Snowflake
Supported
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