# SellerSonar > SellerSonar is an Amazon listing monitoring and protection platform for sellers, agencies, and brands. It continuously tracks ASINs across all Amazon marketplaces and sends real-time alerts on hijackers, Buy Box loss, listing changes, suppressions, keyword ranks, reviews, and competitor activity — no Seller Central connection required. SellerSonar was built by Amazon sellers for Amazon sellers. The platform checks listings every 1–4 hours (depending on plan), detects issues within minutes, and delivers alerts via email, in-app, Slack, and webhooks. Core use cases: protecting revenue from hijackers, monitoring Buy Box ownership, catching unauthorized listing changes, tracking keyword rankings, monitoring competitor pricing and reviews, and detecting suppressed listings. Free Business Trial: 14 days, 5 ASINs and 10 keywords, no credit card required. A Full Business Trial ($5 upfront, 14 days) unlocks 500 ASINs and 3,000 keywords. Paid plans: Pro ($19.98/mo annually), Premium ($39.98/mo), Business ($74.98/mo), and Enterprise (custom). ## Core product pages - [Homepage](https://sellersonar.com/): Overview of SellerSonar's Amazon monitoring platform - [Plans & Pricing](https://sellersonar.com/plans-comparison/): Pro, Premium, Business, and Enterprise plan comparison - [Demo](https://sellersonar.com/demo/): Request a guided product walkthrough - [Chrome Extension](https://sellersonar.com/chrome-extension/): Browser extension for accessing SellerSonar data while browsing Amazon - [API & Webhooks](https://sellersonar.com/amazon-monitoring-api/): Developer access for custom integrations and automation - [Affiliate Program](https://sellersonar.com/affiliate-program/): Earn commissions by referring SellerSonar ## Alerts - [All Alerts Overview](https://sellersonar.com/alerts/): Index of every alert type SellerSonar supports - [Hijacking Alerts](https://sellersonar.com/hijacking-alerts/): Detect unauthorized sellers on your listings within minutes - [Buy Box & Pricing Alerts](https://sellersonar.com/alerts/buy-box-and-pricing/): Notifications when you lose or regain the Buy Box and when competitor prices shift - [Review Alerts](https://sellersonar.com/alerts/review-alerts/): Real-time alerts for new reviews and rating changes - [Content Change Alerts](https://sellersonar.com/alerts/content-changes/): Alerts when titles, bullets, images, or descriptions change - [Ranking Alerts](https://sellersonar.com/alerts/ranking-alerts/): Keyword position change notifications - [Retail Issues Alerts](https://sellersonar.com/alerts/retail-issues/): Suppression and catalog issue detection - [Badges Alerts](https://sellersonar.com/alerts/badges-alerts/): Amazon's Choice and Best Seller badge tracking - [Product Listing Alerts](https://sellersonar.com/product-listing-alerts/): General listing change monitoring - [Suppression Alerts](https://sellersonar.com/amazon-product-suppression-alerts/): Detect when listings are removed from search - [Price Change Alerts](https://sellersonar.com/amazon-price-change-alerts/): Track price movements and history - [Review & Rating Alerts](https://sellersonar.com/amazon-product-reviews-and-rating-alerts/): Combined review and rating monitoring ## Trackers - [All Trackers Overview](https://sellersonar.com/trackers/): Index of every tracker SellerSonar provides - [Keyword Monitoring](https://sellersonar.com/trackers/keyword-monitoring/): Daily organic and sponsored keyword rank tracking - [Buy Box Monitoring](https://sellersonar.com/trackers/buy-box-monitoring/): Buy Box ownership percentage and loss detection - [Competitor Monitoring](https://sellersonar.com/trackers/competitor-monitoring/): Track competitor ASIN pricing, reviews, BSR, and listing changes - [Product Monitoring](https://sellersonar.com/trackers/product-monitoring/): Unified dashboard for all ASIN metrics - [Ranking Monitoring](https://sellersonar.com/trackers/ranking-monitoring/): BSR and category rank tracking - [Review Monitoring](https://sellersonar.com/trackers/review-monitoring/): Review volume, sentiment, and rating trend tracking - [Shelf Intelligence](https://sellersonar.com/trackers/shelf-intelligence/): Share of shelf and category visibility analytics - [Amazon Keyword Rank Tracker](https://sellersonar.com/amazon-keyword-rank-tracker/): Dedicated keyword position tracking tool - [BSR & Buy Box Tracker](https://sellersonar.com/amazon-bsr-best-sellers-rank-buy-box-tracker/): Combined BSR and Buy Box tracker - [Competitor Research](https://sellersonar.com/competitor-research/): Competitive intelligence dashboard ## Free tools - [Free Tools Overview](https://sellersonar.com/free-tools/): All free SellerSonar tools - [Listing Quality Checker](https://sellersonar.com/free-tools/amazon-listing-quality-checker/): AI-powered listing scoring with improvement recommendations — no account required for basic checks - [FBA Calculator](https://sellersonar.com/free-tools/fba-calculator/): Calculate FBA fees, profit margins, and FBA vs FBM profitability ## Blog — monitoring and protection - [Amazon Listing Hijacking: Ultimate Tips](https://sellersonar.com/blog/amazon-listing-hijacking-ultimate-tips-for-amazon-sellers/): Comprehensive guide to detecting and preventing hijackers - [Amazon Listings Hijacking](https://sellersonar.com/blog/amazon-listings-hijacking/): How hijacking works and how to respond - [Suppressed Amazon Listing](https://sellersonar.com/blog/suppressed-amazon-listing/): Causes and fixes for suppressed listings - [How to Win the Buy Box](https://sellersonar.com/blog/how-to-win-the-buy-box/): Strategies for winning and keeping the Buy Box - [What Is the Amazon Buy Box](https://sellersonar.com/blog/what-is-amazon-buy-box/): Buy Box mechanics explained - [How to Track Reviews on Amazon](https://sellersonar.com/blog/how-to-track-reviews-on-amazon/): Methods for monitoring product reviews - [Best Tools for Managing Reviews](https://sellersonar.com/blog/best-tools-for-managing-reviews-and-feedback-on-amazon/): Review management tool comparison - [Share of Shelf: SellerSonar Guide](https://sellersonar.com/blog/share-of-shelf-sellersonar-guide/): Measuring brand visibility on Amazon - [Amazon Review Checker](https://sellersonar.com/blog/amazon-review-checker/): Spotting fake reviews and review fraud ## Blog — keywords and rankings - [Amazon Keyword Research](https://sellersonar.com/blog/amazon-keyword-research/): Foundational keyword research for Amazon sellers - [Amazon Keyword Rank Tracker](https://sellersonar.com/blog/amazon-keyword-rank-tracker/): Why and how to track keyword rankings - [Amazon Backend Keywords](https://sellersonar.com/blog/amazon-backend-keywords/): Optimizing hidden search terms - [Amazon Best Sellers Rank (BSR)](https://sellersonar.com/blog/amazon-best-sellers-rank-bsr/): Understanding BSR and its impact - [Amazon SEO Complete Guide](https://sellersonar.com/blog/amazon-seo-complete-guide-on-how-to-rank-your-products-higher/): End-to-end Amazon SEO guide - [Amazon Platinum Keywords](https://sellersonar.com/blog/amazon-platinum-keywords/): Advanced keyword features for established sellers ## Blog — pricing and fees - [How to See Price History on Amazon](https://sellersonar.com/blog/how-to-see-price-history-on-amazon/): Tools and techniques for viewing price history - [Tracking Amazon Prices](https://sellersonar.com/blog/tracking-amazon-prices/): Price monitoring strategies - [Amazon Seller Fees](https://sellersonar.com/blog/amazon-seller-fees/): Complete breakdown of FBA and seller costs - [How to Use Amazon FBA Calculator](https://sellersonar.com/blog/how-to-use-amazon-fba-calculator/): Walkthrough of fee and profit calculations ## Blog — competitor comparisons - [Helium 10 vs SellerSonar](https://sellersonar.com/blog/helium10-vs-sellersonar/): Side-by-side comparison with Helium 10 - [Jungle Scout vs SellerSonar](https://sellersonar.com/blog/jungle-scout-vs-sellersonar/): Side-by-side comparison with Jungle Scout - [SellerApp vs SellerSonar](https://sellersonar.com/blog/sellerapp-vs-sellersonar/): Side-by-side comparison with SellerApp - [Best Tools for Amazon Sellers](https://sellersonar.com/blog/best-tools-for-amazon-sellers/): Roundup of top Amazon seller software - [Best Amazon Listing Optimization Tools](https://sellersonar.com/blog/best-amazon-listing-optimization-tools/): Listing optimization tool comparison - [Best Amazon Product Research Tools](https://sellersonar.com/blog/best-amazon-product-research-tools/): Product research tool comparison ## Blog — listing optimization - [Amazon Listing Optimization](https://sellersonar.com/blog/amazon-listing-optimization/): Tactics for improving listing performance - [Amazon Images Requirements](https://sellersonar.com/blog/amazon-images-requirements/): Product image specs and best practices - [Amazon A+ Content](https://sellersonar.com/blog/amazon-a-content/): Enhanced brand content guide - [How to Use Listing Quality Checker](https://sellersonar.com/blog/how-to-use-amazon-listing-quality-checker/): Walkthrough of the LQC free tool ## Blog — brand protection and selling on Amazon - [Amazon Brand Registry](https://sellersonar.com/blog/amazon-brand-registry/): Registration process and protection benefits - [Amazon Project Zero](https://sellersonar.com/blog/amazon-project-zero/): Counterfeit protection program - [How to Run Competitor Analysis on Amazon](https://sellersonar.com/blog/how-to-run-a-competitor-analysis-on-amazon/): Step-by-step competitor research - [What Is Amazon FBA](https://sellersonar.com/blog/what-is-amazon-fba/): Introduction to Fulfillment by Amazon - [Amazon FBA vs FBM](https://sellersonar.com/blog/amazon-fba-vs-fbm/): Comparing fulfillment models - [How to Start Amazon FBA](https://sellersonar.com/blog/how-to-start-amazon-fba/): Beginner's guide to launching on FBA - [How to Increase Sales on Amazon](https://sellersonar.com/blog/how-to-increase-sales-on-amazon/): Growth tactics for Amazon sellers - [Amazon PPC Strategies](https://sellersonar.com/blog/amazon-ppc-strategies/): Sponsored ads strategy guide - [Amazon Conversion Rate](https://sellersonar.com/blog/amazon-conversion-rate/): Improving listing conversion - [Amazon Product Launch](https://sellersonar.com/blog/amazon-product-launch/): Launching new products on Amazon - [Amazon Repricing Software](https://sellersonar.com/blog/repricing-software-for-amazon/): Repricing tool comparison ## Optional - [Affiliate Program](https://sellersonar.com/affiliate-program/): Partner program details for affiliates and agencies