SellerAider crosslists items to Whatnot. SellDeck runs your Whatnot business.
SellerAider is a Chrome-extension-based crosslisting tool aimed at fashion-resale closets — Depop, Poshmark, Vinted. It does support pasting listings into Whatnot, but its product was never built for live-stream sellers. SellDeck was. We plan and curate shows by theme, pause cross-listings the moment you go live and resume them after, parse Whatnot weekly reports for fee reconciliation, and run a purpose-built browser extension that captures Whatnot order, payout, and show data in real time — none of which SellerAider does.
Plan a Whatnot show by theme, auto-curate 60 candidate items in seconds, generate QR-coded prep sheets, and track profit per show. SellerAider has no live-selling features.
When you go live on Whatnot, SellDeck automatically pauses your eBay and Etsy listings to prevent oversells, then resumes them after your show ends. This is the #1 problem multi-channel Whatnot sellers face.
Our browser extension captures every order, payout, fee, and show metric from Whatnot in real time — no CSV imports. SellerAider's extension copies listing forms between marketplaces; it doesn't pull live Whatnot data.
Per-item profit, Whatnot weekly report parsing, P&L statements, IRS Schedule C with automated line mapping. SellerAider focuses on listing volume, not financial outcomes.
Price estimates from your photo plus recent eBay sold listings — defensible numbers, not guesses. SellerAider has AI listing creation; not the same thing as AI pricing.
Start with 25 items free. SellerAider requires a paid subscription from day one (no free tier, 14-day trial only).
A detailed look at what each platform offers.
| Feature | SellDeck | SellerAider |
|---|---|---|
| Whatnot Show Planning & Prep Sheets | ||
| Auto-Curate Show Roster by Theme | ||
| Cross-Listing Pause/Resume During Live Shows | ||
| Whatnot Weekly Report Import & Reconciliation | ||
| Real-Time Whatnot Order/Payout Sync (Extension) SellDeck extension captures GraphQL + DOM; SellerAider extension does form-fill crosslisting | ||
| Profit-per-Show Analytics | ||
| Whatnot Buyer Directory & VIP Scoring | ||
| Multi-Marketplace Crosslisting (15+ platforms) SellDeck integrates 5 (eBay, Etsy, Depop, Mercari, Poshmark via webhook); SellerAider crosslists to 15+ | ||
| Poshmark Closet Sharing Automation | ||
| Depop / Vinted Refresh & Relist | ||
| AI Listing Generation From Photo | ||
| Inventory Management | ||
| Per-Item Profit Tracking | ||
| eBay Sold Price Lookup (real comps) | ||
| P&L and Schedule C Tax Reports | ||
| State-Level Sales Tax Breakdown | ||
| Expense Tracking & Mileage | ||
| QR Labels & Batch Printing | ||
| eBay Watch & Competitor Tracking | ||
| Free Plan |
More features at a lower price point.
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Common questions about SellDeck vs SellerAider.
SellerAider's Whatnot support is one-way listing copy — paste a product into Whatnot's store. It does not plan shows, auto-curate by theme, pause cross-listings during live, parse Whatnot weekly reports, or capture real-time order/payout data. SellDeck does all of those because we were built for live-stream sellers from day one. Treat it like the difference between "uploads files to YouTube" and "produces a YouTube show" — both technically interact with the platform; only one is built for the use case.
Only if you're a Whatnot seller. If your business is closet-style fashion reselling on Poshmark, Vinted, and Depop with cross-listing automation, SellerAider is purpose-built for that and we're not. If your business runs on Whatnot live shows — or you're thinking about adding Whatnot — SellDeck is the better fit, and many of our customers run SellerAider alongside us for non-Whatnot crosslisting.
No. We don't do Poshmark closet shares, Depop refreshes, or Vinted bumps. Those are SellerAider's strongest features and we don't try to compete on that surface. Use SellerAider for marketplace-engagement automation and SellDeck for the parts of your business those tools don't touch — show planning, profit tracking, and taxes.
They do different things. SellerAider's extension copies listing fields between marketplaces (Depop → Poshmark, etc.). SellDeck's extension is a passive data pipeline — it watches your Whatnot dashboard, captures orders, payouts, fees, and show analytics in real time, and feeds them into your Selldeck account. If you sell on Whatnot, you want the data pipeline. If you live in Poshmark, you want the form-filler.
Yes — and many sellers do. SellerAider handles your Poshmark / Depop / Vinted automation and crosslisting; SellDeck handles your Whatnot operations, profit tracking, and taxes. They overlap on inventory management but the cost of running both is lower than the value of either solo.
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