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features
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support

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Description

Seller Assistant is an Amazon seller software for bulk analysis and product research. It combines three extensions: Seller Assistant Browser Extension, IP-Alert Chrome Extension by Seller Assistant, and VPN by Seller Assistant, Amazon seller tools: Price List Analyzer, Brand Analyzer, Bulk Restrictions Checker, Seller Spy, API and features: Side Panel View, FBM&FBA Profit Calculator, Quick View, ASIN Grabber, Stock Checker, IP Alert, and Restrictions Checker. Excellent for wholesale, online arbitrage, and dropshipping.

Description

Spillmark is an online analytics and experimentation tool designed specifically for Amazon sellers utilizing Meta ads. This platform integrates data from Amazon Seller Central, Amazon Ads, Meta, and optionally Shopify, allowing users to assess their sales, expenses, fees, advertising costs, and overall channel profitability through various connections and report imports. Sellers have the capability to create and execute geographic holdout tests, which involve pausing Meta ads in designated areas to compare Amazon sales and evaluate the incremental impact of their advertising efforts. The findings are presented with uncertainty ranges and detailed explanations of the methodologies employed, complemented by dashboards, notifications, and documentation of test designs. Access to connected accounts is strictly read-only, ensuring that the product does not modify any campaigns without the seller's consent. Additionally, Spillmark offers an MCP server and REST API for integration with assistants and scripts, enhancing its usability. Currently, brand-level measurement and tailored recommendations are in a private beta phase. The platform's Starter package allows for one active holdout test and provides alerts, while the Growth package offers unlimited tests, live account connections when applicable, and customized Amazon PPC tests, catering to the evolving needs of sellers as they scale their operations. Through innovative features and user-friendly design, Spillmark aims to enhance the marketing strategies of Amazon sellers.

API Access

Has API No 

API Access

Has API Yes 

Screenshots View All

Screenshots View All

Integrations

Amazon Yes 
Amazon Ads No 
Amazon Seller Central No 
Axis LMS Yes 
Google Chrome Yes 
Meta Ads No 
Microsoft Edge Yes 
Model Context Protocol (MCP) No 
Mozilla Firefox Yes 
Shopify No 

Integrations

Amazon Yes 
Amazon Ads Yes 
Amazon Seller Central Yes 
Axis LMS No 
Google Chrome No 
Meta Ads Yes 
Microsoft Edge No 
Model Context Protocol (MCP) Yes 
Mozilla Firefox No 
Shopify Yes 

Pricing Details

$29.99 per month
Free Trial Yes 
Free Version No 

Pricing Details

$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 Yes 
Free Version No 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Customer Support

Business Hours No 
Live Rep (24/7) Yes 
Online Support No 

Types of Training

Training Docs Yes 
Webinars Yes 
Live Training (Online) Yes 
In Person No 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Vendor Details

Company Name

Seller Assistant

Founded

2019

Country

United States

Website

sellerassistant.app

Vendor Details

Company Name

Spillmark

Founded

2026

Country

United States

Website

spillmark.com

Product Features

Amazon Seller Tools

A/B Testing No 
Alerts / Notifications No 
Analytics / Reporting Yes 
Campaign Management No 
Competitor Analysis Yes 
Content Management / Optimization No 
Conversion / ROI Tracking No 
Customer Data Management No 
Email Marketing No 
Feedback Management Yes 
Inventory Management Yes 
Keyword Tracking / Research No 
Order Management No 
PPC Ads Management No 
Price Optimization Yes 
Rank Optimization Yes 
Refund Management No 
Review Management No 
Sales Tracking / Analysis Yes 
Shipping Management No 
Trend Analysis Yes 

Product Features

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