StackSaverGet access
Ecommerce

How to find winning products with spy tools (step by step)

A repeatable process for finding products that sell: spot demand, confirm it with long-running ads, check the competition and test cheaply.

October 17, 2026 · 8 min read · By the StackSaver team

This post contains affiliate links. If you buy through them we may earn a commission, at no extra cost to you. How we make money

A "winning product" isn't magic. It's a product with proven demand, room to compete and a margin that survives ad costs. Spy tools help you check all three before you spend money on stock or ads.

Here's a step-by-step process you can repeat for every product.

Step 1: Build a long list of candidates

Start wide. Spend an hour collecting 20–30 products that are already selling.

Put each one in a spreadsheet with a link and a one-line note on why it caught your eye.

Step 2: Cut it down with three quick filters

Remove anything that fails one of these:

  1. Price: can you sell it for at least 3x what it costs you, including shipping? Ads eat margin fast.
  2. Shipping: is it light, unbreakable and size-free? Fragile or sized items mean returns.
  3. Visual hook: can you show why it's great in the first 3 seconds of a video? If not, it'll be hard to advertise.

You should be down to 5–10 products.

Step 3: Confirm demand with long-running ads

This is where ad spy tools earn their keep. Advertisers don't keep paying for ads that lose money, so an ad that has run for weeks is a strong sign the product sells.

For each remaining product:

Keep products with at least one long-running ad and more than one advertiser. Save the best 5–10 ads for each into a folder.

Step 4: Check the competition

Pick your top 2–3 products and look at who sells them.

You're looking for one clear way to be better: a lower price, a bundle, a better angle in the ads, faster shipping, or better photos.

Step 5: Study the winning ads (don't copy them)

Go back to the ads you saved and write down:

Then write three new hooks of your own using the same angles. Copying a competitor's actual video is lazy and often gets ads rejected. Copying the angle is just good research.

Step 6: Make the creative and test small

Launch with a small test budget that you decide in advance, and decide in advance how you'll judge the results. Keep what works, cut what doesn't, and move to the next product on your list.

The tools for each step

Step Paid tools Free alternative
Candidates Kalodata, WinningHunter, ShopHunter TikTok Creative Center, Amazon Movers & Shakers
Demand AdSpy, PiPiAds Meta Ad Library
Competition SimilarWeb, ShopHunter SimilarWeb free
Creative Canva Pro, CapCut Pro, Mokker, ElevenLabs Canva and CapCut free plans

Every paid tool in that table is in the Luxury Tools membership, for $29.95 a month. See the ecommerce lineup, or compare the tools in Best product research tools and Best ad spy tools.

Get the free $30 Ecom Stack guide

The exact tools to use at each step of launching a product, plus the free alternatives. One email a week after that; unsubscribe any time.

No spam. We use Kit to send emails; see our privacy policy.

Keep reading