Username Inspector now supports 11 reselling platforms. We've just added Whatnot, Bonanza, Ruby Lane, and Chairish — four marketplaces that serve very different niches but share one thing in common: your username matters on all of them.
Here's what each platform offers and why you should check your username availability on them before someone else claims it.
Whatnot — Live Selling for Collectors
Whatnot is a live auction marketplace built around collectibles, trading cards, vintage toys, and sneakers. Sellers run live streams where buyers bid in real time — think QVC meets Twitch, but for resellers.
The platform has grown fast, especially with sports card and Funko Pop sellers. Your Whatnot profile lives at whatnot.com/user/yourusername, so a clean, memorable username is essential for building a following that comes back to your streams.
If you're already selling collectibles on eBay or Mercari, Whatnot gives you a live audience that's ready to buy. Securing the same username across all three platforms keeps your brand consistent. See our guide to selling on every major reselling platform for setup instructions across all eleven marketplaces.
Bonanza — The Seller-Friendly eBay Alternative
Bonanza positions itself as an alternative to eBay with lower fees and a more seller-friendly experience. It's popular with sellers of unique, handmade, and vintage items — similar to what you'd find on Etsy, but with a broader marketplace feel.
On Bonanza, your storefront is called a "booth" and lives at bonanza.com/booths/yourusername. The booth concept means your username doubles as your shop name, making it even more important to choose something professional and brandable.
Ruby Lane — Curated Antiques and Collectibles
Ruby Lane is a curated marketplace for antiques, art, vintage collectibles, and jewelry. It's smaller and more specialized than eBay, which means less competition and buyers who know what they're looking for.
Your Ruby Lane shop URL is rubylane.com/shop/yourusername. The platform attracts serious collectors willing to pay premium prices, so your username and shop presence carry real weight here. If you sell antiques or fine vintage items, Ruby Lane is worth adding to your multi-platform strategy.
Chairish — Vintage Furniture and Design
Chairish focuses on vintage and luxury furniture, home decor, and art. It's a design-forward marketplace where presentation matters — and that starts with your shop identity.
Your Chairish shop lives at chairish.com/shop/yourusername. The platform appeals to interior designers and design-conscious buyers shopping for statement pieces. If you source vintage furniture, lighting, or decor, Chairish puts you in front of buyers who appreciate quality and are willing to pay for it.
Why Consistent Usernames Matter Across Platforms
Every new platform you join is another place buyers can find you — or lose you. When your username matches across eBay, Poshmark, Depop, Etsy, Whatnot, Bonanza, Ruby Lane, Chairish, and the rest, buyers can search for you anywhere and find the same seller they already trust.
Inconsistent usernames create friction. A customer who loves your eBay store searches for you on Whatnot and finds nothing — or worse, finds someone else. A consistent multi-platform brand avoids that entirely. For strategies on managing your identity across platforms, see our guide to choosing the right username for your reselling brand.
Check Your Username Across All 11 Platforms
With these four additions, Username Inspector now covers 11 reselling marketplaces: eBay, Poshmark, Depop, Etsy, Grailed, Vinted, Mercari, Whatnot, Bonanza, Ruby Lane, and Chairish.
Check your username availability across all of them in seconds. Enter your username (or a list of options you're considering), select the platforms you care about, and get direct links to each profile page.
If you're just getting started and need help picking the right name, read our guide on choosing the right username for your reselling brand. For a deep dive into character limits and rules on every platform, check out username rules and limits for every reselling platform.