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SellerSonar vs Spillmark

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

SellerSonar compared with Spillmark
DetailSellerSonar logo SellerSonarSpillmark logo Spillmark
What it doesAmazon seller software for listing monitoring and competitor tracking Run your Amazon store on autopilot with AI agents
StageNot given Not given
Founded2022 Not given
Based inUS US
Pricing modelFreemium Paid
PricingNot given 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)
Key features
  • Real-time alerts for listing changes and retail issues
  • Buy Box tracking and monitoring
  • Competitor monitoring with price and ranking tracking
  • AI-powered Listing Quality Score (LQS) analysis
  • Keyword ranking and Share of Voice tracking
  • Review tracking and sentiment analysis
  • Chrome browser extension for product page insights
  • Coverage across 23 Amazon marketplaces
  • API access and webhook integrations
  • AI Agent integration via MCP protocol
  • 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
What makes it different
  • Complete monitoring solution covering listing issues, Buy Box changes, pricing, competitor movements and keyword rankings in one dashboard
  • 40+ customizable alerts for price changes, Buy Box shifts, new reviews and listing changes
  • Global coverage monitoring across all Amazon marketplaces
  • SharkGuard protection against unauthorized sellers and listing changes
  • No Seller Central account required to get started
  • Measures true sales lift causation, not platform attribution credit
  • Built by and tested on an actual Amazon seller's own brand
  • Tests locked before starting with results never edited after
  • Data never shared, pooled or benchmarked with other brands
  • Read-only access by default with full user approval for all changes
Ships internationallyNot given Not given
Sells onlineNot given Not given
Physical shopNot given Not given
Community votes00
DR (Domain Rating by Ahrefs)28 no change since last checkNot checked yet no change since last check
Trust Flow (Majestic)130
Citation Flow (Majestic)320
Referring domains (Majestic)1890

5 details filled in for both companies.

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