Profit insights for Whatnot sellers

Big sales. But did you make money?

BidBrain turns your Whatnot reports into a clear breakdown of profit, losing lots and what to change before your next show.

Explore the demo Start free trial

14 days freeNo credit cardNo marketplace password

Vintage Baseball NightSaturday, 7 PM · 61 lots · 192 minutes live

Sample data

You sold $6,303. Here's what remained.

After recorded costs

$3,170

Needs attention

4 lots sold below cost

Suggested next step

Review minimum prices

Gross sales$6,303
Whatnot fees−$747
Shipping you paid (giveaways)−$19
Refunds−$38
Inventory cost you entered−$2,329
After recorded costs$3,170

Sample seller with six shows. Not a customer result.Open the full demo →

What you get

Three answers after every show.

Profit

What each show left you after the costs in your reports.

Per show, per time slot, per platform
Fees, shipping, refunds and inventory cost
Year totals for your tax preparer

Problem inventory

The lots and stock that are costing you money.

Lots that sold below cost
Items sitting unsold, oldest first
A list ready to cross list

Next actions

A short, plain English list of what to look at before you go live again.

Slots that underperformed in your data
Regulars who skipped, ready to message
Lots that need a minimum price

How it works

Download. Upload. Review.

01 · DOWNLOAD

Grab your weekly statement

On whatnot.com: seller menu, Financials, Statements. One CSV per week.

02 · UPLOAD

Drop the files in

Read in your browser. Only the sale lines are saved. Add more weeks anytime; duplicates are skipped.

Whatnot statementWhatnot livestreams reporteBay transaction reportVinted and Poshmark via our template

03 · REVIEW

Read your scorecard

Totals are calculated straight from your reports. BidBrain then writes up what stood out in plain English.

Your data and our numbers

Easy to check. Clear about what's missing.

What the profit includes

Marketplace fees from your statement
Shipping you paid and refunds
Inventory cost you entered or uploaded
Supplies, packaging, gas, rent and other costs you haven't added

So we call it profit after recorded costs, not take home pay.

When data is missing, you'll see it

Inventory costs: Lots without a cost are counted and flagged
Show length: Marked reported or estimated
Data coverage: Shows which weeks and platforms are loaded
Recommendations: Based only on the shows you've uploaded

How your data is handled

No marketplace password, ever. You download your own reports.

Files are read in your browser. Only sale lines are stored: date, item, buyer username, amounts and fees.

Export or delete everything from the app at any time.

Try it

Free for 14 days.

Everything unlocked

No credit card. Sign in with Google or your email.

Unlimited shows and uploads
Whatnot, eBay, Vinted and Poshmark
Losing lots and unsold stock
Buyer and time slot insights
Year end totals
Export or delete anytime

Start free trial Explore the demo first

Nothing is charged when the trial ends. You choose whether to subscribe, and the price is shown before you do.

Questions

Before you try it

Is BidBrain part of Whatnot?

No. BidBrain is independent and isn't affiliated with, endorsed by or sponsored by Whatnot, eBay, Vinted or Poshmark. It reads the reports you download from them.

Which platforms work?

Whatnot is the main focus: weekly statements and the livestreams report. eBay transaction reports also upload directly. Vinted, Poshmark and in person sales go in through a simple template or by hand.

How accurate are the numbers?

Totals are added up from the amounts in your own statements, so they match what the platform reported. Profit only includes the costs in your files, and anything missing, like an inventory cost or a show's length, is flagged so the number never looks better than it is.

What happens after 14 days?

Your reports pause and your data stays put. You can subscribe from inside the app, or export and delete your data. No card is taken during the trial, so nothing is charged automatically.

You know what sold. See what you kept.

Open the sample report, or start your free trial with your own statement.

Explore the demo Start free trial