Built on Meta's official Ad Library API

Know a product sells before you spend a cent on it.

SellProof scans Meta's Ad Library in 28 European markets, keeps only the shops truly selling your product, and tells you straight: PASS, UNSURE or FAIL, with the reasons behind it.

Know what to test, and what to skip
Real competitors only, no look-alikes
Your data never leaves your computer
One payment, yours to keep

Get SellProof for €39 Try the free demo

14-day refund if it won't run · VAT included · Windows (64-bit), Mac (Apple Silicon) and Linux (64-bit)

SellProof · Check a product

Portable blenderDE · PL · NL · ES

PASS

Someone already spends heavily to sell this.

A competitor with 5+ ads for this product runs 255 active ads in total (threshold 100).

Real competitors10

Most ads by one competitor255

Longest-running ad190 days

ShopAds about itAds runningRunning for

viloco.nl16148181 days

nysurostudio.pl15158188 days

nyrogoods.nl15153190 days

Sample data from the free demo. Shop names are invented.

Map of Europe: the 27 EU countries and the UK are highlighted; other countries are grey.

Coverage

EU + UK. 28 markets, one search.

Pick your markets, add search words in each language, and SellProof checks them all in one run.

CoveredNot in Meta's Ad Library API

Austria, Belgium, Bulgaria, Croatia, Cyprus, Czechia, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden and the United Kingdom.

The problem

The answer is in the Ad Library. Finding it by hand takes hours.

Every EU and UK product ad is public. But the Ad Library searches one country at a time, mixes in ads that only share a word, and never tells you what's working.

28 countries, 28 searches

Every market, every language, every search word means a new tab. Checking all of Europe means dozens of them.

Noise that looks like competition

Search “ice roller” in Germany and you also get scooters, because “Roller” means scooter in German. Count those and your research is wrong.

No verdict at the end

A list of ads won't tell you if a product is worth testing. You're left guessing who's serious and who gave up.

Three features, one app

From “should I sell this?” to “what's working right now?”

Check a product

Describe your product once. SellProof searches every market you picked, keeps only the shops selling that exact thing, and hands you PASS, UNSURE or FAIL, with the reasons, the next step, competitor prices and their best ads.

Verdict + reasons
Competitor prices
Seasonal-aware

Winning ads

See which ads keep running, in your niche or any niche, country by country. Hide the big retailers, filter as you type, and save the best to your swipe file.

Watch competitors

Pick the brands you care about. Every check shows what they launched, what they stopped, which creatives they're scaling, and where they're heading.

Reports you keepHTML, CSV or Markdown, Obsidian-ready, and searchable in the app.

Guided or ProStep-by-step help while you learn, a compact view once you don't need it.

English and GermanThe whole app in both languages, in light or dark mode.

See it in action

See exactly what you get.

SellProof · Check a product

Check a product: a green “PASS · Worth testing” verdict, the reason, what to do next, three key numbers and the competitors table.

A clear verdict, the reason behind it, and every real competitor in one table.

Try this in the demo

Swipe the screenshot sideways to see all of it. Real app, sample data from the free demo. Shop names are invented.

Under the hood

No black box. Just rules you can see and change.

You'll bet real money on these results. You should see exactly how they're made.

Precise competitor matching

An ad only counts when it's about your product. You set the rules:

Must wordsan ad has to contain them
Leave-out wordsone of them and the ad is out
What it is / isn'trules out look-alike products
AI suggestionssearch words for every language, then checked

A verdict with a clear rule

A product passes when a serious seller is behind it:

A competitor with 5+ ads for this product, running 100+ ads in total

Both numbers are yours to change, as strict or as loose as you like.

Official API onlyMeta's Ad Library API, through your own free developer app. No scraping, no extensions.

Local by designProducts, results and reports stay on your computer. Your keys go only to Meta.

Handles Meta's limitsHits an hourly limit? SellProof waits it out. Access renews every 60 days, with a reminder first.

Seasonal-awareFor seasonal products, it looks back over the past year, not just today.

The difference

Same data. None of the digging.

What you need	Ad Library by hand	SellProof
All your markets in one run	One country at a time	All 28 at once
Unrelated ads filtered out	You sort them yourself	Filtered by your rules
A verdict on the product	No	PASS / UNSURE / FAIL + why
Competitors' shop prices	Open each shop	Collected for you
New and stopped ads per brand	Remember it yourself	Tracked on every check
Saved reports and swipe file	Screenshots	HTML, CSV or Markdown

Try the free demo

How it works

Set up once. Check any product in a few clicks.

01

Connect to Meta
One-time setup

Create your free Meta developer app. The built-in video guide walks you through it step by step, Meta's identity check included. You only do this once.
02

Describe your product

Name it, say what it is and isn't, pick your markets. Let AI suggest search words in every language, or type your own.
03

Get your answer

Run the check. Get your verdict, the competitors and their best ads. Save the report, or start watching the brands that matter.

Straight talk

The fine print, upfront.

If any of these is a deal-breaker, the free demo shows you before you pay a cent.

No ad spend or sales figures. Meta doesn't publish them for product ads, so no tool on the official API can. SellProof reads a signal that's hard to fake instead: sellers don't keep paying for ads that lose money. Ads that keep running for weeks are one of the strongest public signs a product sells.
EU and UK only, no US. Meta's API only covers product ads shown in Europe. US product ads aren't available to any tool through it.
You need a free Meta developer account. A one-time setup, including Meta's identity check. It's what keeps your data official and in your hands.

Pricing

Pay once. It's yours.

Costs less than one failed product test.

SellProof

Early-access price

€39 Regular price ~~€49~~

One-time payment, VAT included

All three features: product check, winning ads, competitor watch
28 markets: all EU countries and the UK
Reports in HTML, CSV and Markdown
Windows, Mac (Apple Silicon) and Linux
App in English and German
Video guide for the Meta setup
Every future update, free for early buyers

Get SellProof for €39

14-day refund if it won't run or connect
Secure checkout by Lemon Squeezy · licence key by email

Not sure yet? Try the free demo first

Questions? Answered.

Do I need to pay Meta anything?

No. The Meta developer app and the Ad Library API are free, and you don't need to run any ads. You create the developer app with your Facebook account. You only pay once for SellProof.

Is this allowed by Meta?

Yes. SellProof uses Meta's official Ad Library API through your own developer app, under the terms you accept from Meta during setup. It reads the same public ads you can see at facebook.com/ads/library. No scraping, nothing against Meta's rules.

Is this a subscription?

No. €39 once, VAT included, and the app is yours. Early buyers get every update free. No monthly bill while you're still looking for a winner.

Where is my data stored?

On your computer. SellProof talks to Meta's API directly with your own app. Products, results and reports stay local. SellProof has no server, and the shop check reads competitors' public Shopify product lists.

Can I see US ads?

No. Meta's API only returns product ads delivered in the EU and UK.

Do I need technical skills?

No. Guided mode explains every step, and the video guide walks you through the Meta setup.

Can I try it first?

Yes. The free demo runs in your browser with made-up brands, ads and shops, so you can click through every feature before you buy. No account needed, and nothing is sent to Meta.

What if it's not working for me?

If SellProof won't run on your computer or can't connect to Meta, and we can't fix it within 14 days, you get your money back. Just email support@setuplabco.com with what happens on your screen.

Why does Meta want to confirm my identity?

Meta asks everyone who uses the Ad Library API to confirm who they are, once. That's Meta's rule, not ours, and SellProof never sees your documents.

Windows or my Mac warns me when I open it. Is that normal?

Yes. SellProof is a new app from a small maker, so Windows and macOS don't know it yet and ask you to confirm once. Windows: on “Windows protected your PC”, click More info, then Run anyway. Mac: if it says SellProof can't be opened, open System Settings → Privacy & Security, scroll down and click Open Anyway next to SellProof. After that it opens normally.

How many searches can I run?

Meta limits searches per app per hour. SellProof shows your usage in the sidebar, and if Meta asks it to slow down, it waits and tries again by itself. Searches you repeat on the same day reuse the results it already fetched (you can turn this off).

What are the system requirements?

WindowsWindows 10 or 11, 64-bit (x86-64). Installer (.exe) for your user account, no admin rights needed. The window runs on Microsoft Edge WebView2, which ships with Windows 11 and up-to-date Windows 10.

macOSmacOS 11 Big Sur or newer on Apple Silicon (M1 and newer, native arm64 build). Disk image (.dmg), drag to Applications.

Linux64-bit (x86-64) AppImage, no install. Needs glibc 2.35 or newer (Ubuntu 22.04, Debian 12, Fedora 36 or later). Opens in your default browser.

InternetNeeded for searches (Meta's Ad Library API). The licence is checked once a month; in between it works offline.

Not supported32-bit systems, Intel Macs, ChromeOS, phones and tablets.

Test your next product with proof.

Try the demo with sample data now, or get SellProof and run your first real check today.