DealSonar
Facebook Marketplace, Vinted, eBay & OfferUp alerts with sold comps and profit estimates for resellers.
A startup from the United Kingdom.
Facebook Marketplace, Vinted, eBay & OfferUp alerts with sold comps and profit estimates for resellers.
A startup from the United Kingdom.
This page is designed to help you find out whether DealSonar is good and if it is the right choice for you.
DealSonar is a marketplace monitoring tool for resellers. Set keyword, location, and price filters once, then get alerts when new listings appear on Facebook Marketplace, Vinted, eBay, and OfferUp.
Who it's for Resellers and flippers across the UK, US, and EU who source locally and need to move faster than manual refresh.
What you get - Continuous monitors for Facebook Marketplace, Vinted, eBay, and OfferUp - Instant alerts via Dashboard, Email, Discord, and Telegram - eBay sold comps and profit estimates so you can judge margin before you buy - A web dashboard that works on desktop or mobile (no app download)
How it works Create a monitor with your search and filters. DealSonar watches for matching listings and notifies you when something lands. Review comps and estimated profit in one workflow, then message the seller while the deal is still live.
Trial Every paid plan includes a 7-day free trial. Start at dealsonar.io.
Listed in
Marketplaces
Facebook Marketplace, Vinted, eBay, OfferUp
Alerts
Dashboard, Email, Discord, Telegram
Sold comps
eBay sold data on matching listings
Profit estimates
Margin estimate before you buy
Custom monitors
Keyword, location, price range, radius
Platforms
Web app (desktop and mobile browser)
Free trial
7-day trial on paid plans
Regions
UK, US, EU (worldwide where marketplaces allow)
Choose DealSonar if you want speed and clarity together: continuous monitors across the marketplaces resellers actually use, instant alerts (Dashboard, Email, Discord, Telegram), and sold comps with profit estimates instead of alerts alone. It is built as a web dashboard for UK, US, and EU resellers, with a 7-day free trial on paid plans.
Resellers, flippers, and side hustlers who source on Facebook Marketplace, Vinted, eBay, and OfferUp, then sell on eBay or other channels. Typical users hunt phones, laptops, consoles, trainers, and other high-turn categories across the UK, US, and EU
DealSonar combines multi-marketplace monitoring with deal judgment in one workflow. You get alerts for Facebook Marketplace, Vinted, eBay, and OfferUp, plus eBay sold comps and profit estimates on matching listings, so you can decide whether to buy before you message the seller.
DealSonar started from the same problem most local resellers hit: good deals disappear while you manually refresh Marketplace. The product was built to watch searches continuously, alert the moment a listing matches, and surface comps and margin so you can act in seconds, not after the item is gone.
Next.js / React (web app) Supabase (auth and data) Stripe (billing) Optional Chrome extension for messaging workflows
We have collected here some useful links to help you find out if DealSonar is good.
Check the traffic stats of DealSonar on SimilarWeb. The key metrics to look for are: monthly visits, average visit duration, pages per visit, and traffic by country. Moreoever, check the traffic sources. For example "Direct" traffic is a good sign.
Check the "Domain Rating" of DealSonar on Ahrefs. The domain rating is a measure of the strength of a website's backlink profile on a scale from 0 to 100. It shows the strength of DealSonar's backlink profile compared to the other websites. In most cases a domain rating of 60+ is considered good and 70+ is considered very good.
Check the "Domain Authority" of DealSonar on MOZ. A website's domain authority (DA) is a search engine ranking score that predicts how well a website will rank on search engine result pages (SERPs). It is based on a 100-point logarithmic scale, with higher scores corresponding to a greater likelihood of ranking. This is another useful metric to check if a website is good.
The latest comments about DealSonar on Reddit. This can help you find out how popualr the product is and what people think about it.
Do you know an article comparing DealSonar to other products?
Suggest a link to a post with product alternatives.
Is DealSonar good? This is an informative page that will help you find out. Moreover, you can review and discuss DealSonar here. The primary details have not been verified within the last quarter, and they might be outdated. If you think we are missing something, please use the means on this page to comment or suggest changes. All reviews and comments are highly encouranged and appreciated as they help everyone in the community to make an informed choice. Please always be kind and objective when evaluating a product and sharing your opinion.
