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What is Spillmark?

Spillmark is a specialized online analytics and experimentation tool tailored for Amazon sellers who use Meta ads. This innovative platform seamlessly consolidates data from Amazon Seller Central, Amazon Ads, Meta, and optionally Shopify, enabling users to evaluate their sales performance, expenses, fees, advertising costs, and the overall profitability of their channels through a variety of connections and report imports. Sellers can implement geographic holdout tests, which involve suspending Meta ads in specific locations, to analyze Amazon sales and gauge the incremental effects of their advertising strategies. The results are provided with confidence intervals and thorough explanations of the methodologies used, along with dashboards, alerts, and documentation of test designs. Importantly, access to linked accounts is strictly read-only, ensuring that no campaigns are altered without the seller's explicit approval. Furthermore, Spillmark includes an MCP server and REST API, facilitating integration with assistants and scripts to improve its functionality. Currently, the platform is testing brand-level measurement and customized recommendations in a private beta phase. Its Starter package allows users to conduct one active holdout test and receive notifications, while the Growth package includes unlimited tests, live account connections when available, and personalized Amazon PPC tests, addressing the dynamic requirements of sellers as they expand their businesses. Through its cutting-edge features and intuitive design, Spillmark is dedicated to refining the marketing approaches of Amazon sellers and enhancing their overall success. This commitment to innovation positions Spillmark as a vital resource in the competitive landscape of online selling.

What is SentryKit?

SentryKit is the Amazon Seller Intelligence platform — continuous monitoring across every layer of your Amazon catalog, with real-time alerts the moment something shifts. Built for FBA brands and agencies managing anywhere from 1 ASIN to 1,000+ across unlimited seller accounts and marketplaces. 25+ alert types cover the events that actually move revenue: Buy Box Lost, Hijacker Detected, Price Change, Suppressed Listing, Stranded Inventory, Sales Volume Drop, Main Image Change, Negative Review Spike, Best Seller Badge, FBA Fee Change, and more. Critical alerts fire in ~90 seconds with full context — what changed, who caused it, what to do — including seller-profile enrichment on hijackers. Delivered to email, SMS, Slack, Microsoft Teams, webhook, or dashboard, with routing rules per alert, per team member, per client. Pairs with any repricer or AI agent as the intelligence layer underneath. Daily digests, full historical record, every marketplace.

Media

Media

Integrations Supported

Amazon
Amazon Seller Central
Amazon Ads
Meta Ads
Model Context Protocol (MCP)
Shopify

Integrations Supported

Amazon
Amazon Seller Central
Amazon Simple Queue Service (SQS)
BQool Repricing Central
Google Sheets
Informed.co
Microsoft Teams
RepricerExpress
Slack
Zapier

API Availability

Has API

API Availability

Pricing Information

$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 Trial Offered?

Pricing Information

$19 / month · up to 2,000 orde
30-day free trial — full monitoring from day one, no credit card required.

Starter plan — $19 / month · up to 2,000 orders / month, unlimited ASINs

Pro plan — $49 / month · up to 10,000 orders / month, unlimited ASINs

No ASIN limits — monitoring scales with your order volume, not your catalog size. Cancel anytime. No setup fees. No long-term contracts.
Free Trial Offered?

Supported Platforms

SaaS

Supported Platforms

SaaS

Customer Service / Support

24 Hour Support

Customer Service / Support

Web-Based Support

Training Options

Documentation Hub

Training Options

Documentation Hub
Online Training

Company Facts

Organization Name

Spillmark

Date Founded

2026

Company Location

United States

Company Website

spillmark.com

Company Facts

Organization Name

SentryKit

Date Founded

2004

Company Location

United States

Company Website

sentrykit.com

Categories and Features

Categories and Features

Amazon Seller Tools

Alerts / Notifications
Analytics / Reporting
Trend Analysis

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