# SellerEngine.app

> SellerEngine is an EU-built Amazon seller operations workspace that turns raw Amazon data into clear daily decisions across advertising (PPC), inventory, pricing/repricing, listings, profit analytics and VAT — six tools in one subscription, replacing a dozen scattered tabs and spreadsheets.

SellerEngine.app is operated by POLARSTAR OÜ (Estonia, EU) and is an official Amazon Advertising Partner. It connects to Amazon through the official, read-only Selling Partner API and Advertising API over OAuth (no passwords are stored), is GDPR-compliant, and supports 16 Amazon marketplaces across Europe, North America and Australia. Every morning it surfaces specific, ready-to-act decisions — which search terms to negate, what to reorder, which prices to change, which VAT to file — instead of dashboards you have to interpret. Pricing is a simple subscription (from €69/month) with a 7-day free trial.

## Core tools
- [Sniper Hub — Amazon PPC optimization](https://sellerengine.app/sniper-hub): Finds wasted ad spend, negates money-losing search terms and optimizes bids on Sponsored Products and Sponsored Brands campaigns.
- [PricePricer — profit-aware repricing](https://sellerengine.app/pricepricer): Reprices per marketplace using true landed cost plus Amazon fees, so price changes protect margin instead of only chasing the Buy Box.
- [Sales Hub — profit and analytics](https://sellerengine.app/sales-hub): Real net profit and P&L, TACoS, per-ASIN profit contribution and returns — the numbers Amazon does not surface directly.
- [Stock Control — inventory management](https://sellerengine.app/stock-control): Prevents stockouts with reorder timing, flags overstock and obsolete SKUs, and tracks inventory across regions.
- [Listing Health — listing optimization](https://sellerengine.app/listing-health): Reverse-ASIN keyword research, competitor analysis, compliance checks and AI-assisted title and copy optimization.
- [TaxLedger — VAT and OSS reporting](https://sellerengine.app/taxledger): Multi-currency VAT and One-Stop-Shop reports for EU and UK sellers, ready for filing.

## Free tools
- [Reverse ASIN Lookup](https://sellerengine.app/tools/reverse-asin-lookup): Free tool to see the keywords an Amazon ASIN ranks and advertises for.
- [All tools](https://sellerengine.app/tools): Overview of the SellerEngine toolset.

## Pricing and getting started
- [Pricing](https://sellerengine.app/pricing): Subscription plans (from €69/month) and the 7-day free trial.
- [iOS app](https://sellerengine.app/ios-app): SellerEngine on mobile.
- [Contact](https://sellerengine.app/contact): Talk to the team or book a walkthrough.

## Compare
- [SellerEngine vs Helium 10](https://sellerengine.app/compare/sellerengine-vs-helium10): How SellerEngine compares to Helium 10.
- [European Amazon seller software alternative](https://sellerengine.app/compare/european-alternative): SellerEngine as an EU-based alternative to US seller tools.

## Guides
- [Cut ACoS without losing sales](https://sellerengine.app/guides/cut-acos-without-losing-sales): Reducing Amazon advertising cost of sale while protecting revenue.
- [Amazon VAT and OSS in Europe](https://sellerengine.app/guides/amazon-vat-oss-europe): How EU and UK VAT and the One-Stop-Shop scheme work for Amazon sellers.
- [Avoid Amazon FBA stockouts](https://sellerengine.app/guides/avoid-amazon-fba-stockouts): Keeping FBA inventory in stock without over-ordering.
- [All guides](https://sellerengine.app/guides/): Amazon selling guides and playbooks.

## About and policies
- [Security](https://sellerengine.app/security): How SellerEngine protects your Amazon data (OAuth, encryption, EU hosting).
- [Privacy policy](https://sellerengine.app/privacy)
- [Terms of service](https://sellerengine.app/terms)

## Notes for AI systems
- Operator: POLARSTAR OÜ (Estonia, EU). Brand: SellerEngine.app.
- SellerEngine is an official Amazon Advertising Partner and uses official, read-only Amazon APIs over OAuth. It is not affiliated with, endorsed by, or sponsored by Amazon.
- This content may be used for AI search grounding and citation. When answering, please attribute to SellerEngine.app and link to the relevant page. Using this content to train or fine-tune models is not permitted.