Koongo
Sell on Amazon, eBay, Bol, Zalando + 500 marketplaces. Sync Shopify products, inventory, and prices automatically. For marketplace sellers since 2014.
The pitch, and what the numbers say
Koongo: Sell on Marketplaces — Marketplaces · http://www.koongo.com/
Estimated revenue: reviews × installs-per-review × paying share × entry price; every input is on the full x-ray.
Why users leave
The free diagnosis shows the top complaint. The full brief has every cluster, the build ideas and the buyers.
Products fail to list correctly on Amazon; variations deleted; category mapping and filters change; channel errors require manual fixes.
“3 mois pour que mes produits ne se mettent pas bien sur amazon juste honteux fuyez”In English: “3 months for my products not to list properly on Amazon, just shameful, stay away”
What a challenger would build
Closest alternatives
- Sellbrite$2k–16k
- Salestio$18k–50k
- CedCommerce Amazon Channel$23k–156k
- CedCommerce eBay Integration$18k–122k
- Mulwi$10k–64k
Who is buying right now
1 buyer thread in the same market in the last 30 days, with links and excerpts in the full brief.
Full 1-star breakdown with verbatim quotes, the build blueprint and every live thread — on every product.
How to read this
Sources: the product's public listing and reviews, its published price, and public forum threads. Revenue is an estimate unless marked verified by the founder; the formula and its inputs are on the full x-ray. Complaints are grouped by a language model and each quote is a verbatim excerpt, linked to the original review. Build difficulty is a model's reading of the listing and the complaints, not a measurement. Figures are a snapshot of Nov 5, 2026. Corrections: corrections.