We build the apps wewish existed.
A small software team out of Oklahoma City. Our first one is Shelvio — a mobile-first listing app that turns batched photos and voice notes into complete, ready-to-publish listings for eBay, Poshmark, Mercari, Depop, and Etsy in under a minute.
Stop typing. Start selling.
Snap photos in batches, add voice notes as you go, and every item becomes a complete listing — title, category, description, and price — in under a minute.
Three steps. Sixty seconds. Done.
Batch intake
Your phone becomes your intake station. Photograph items in bulk instead of one at a time.
Voice-first
Hands-free voice capture for brand, condition, and model as you work through the pile.
AI that sees
Catches the details you'd miss — materials, flaws, model numbers — straight from your photos.
Your listing voice
Custom instructions shape titles and descriptions to sound like you, not a generic template.
Works with
- eBay
- Poshmark
- Mercari
- Depop
- Etsy
About Us
We're a small software team based in Oklahoma City. We build apps that solve real problems — starting with Shelvio, our first app.
Why "Martinsburg"?
Our name comes from a colorful Macaw mobile in our co-founders' baby's nursery—the first thing that captured their little one's attention. They named the bird Martinsburg, and it stuck.
What are you building?
Our first app is Shelvio — a mobile-first listing app for individual resellers on eBay, Poshmark, Mercari, Depop, and Etsy. Snap photos in batches, add voice notes as you go, and get complete, ready-to-publish listings in under a minute. Join the waitlist for five free listings.
How can I get in contact?
Use the Contact Us link at the bottom of the page. Our contact email is [email protected].