Everything sticker sellers need, in one place.
Stop juggling spreadsheets and sticky notes. Happy Mail HQ keeps your sticker & stationery business organized so you can focus on selling.
Your Toolkit
- Address Book
- Inventory
- Postage
- Invoices
- Sale Calendar
Five Tools. One Membership.
Simple, powerful tools designed specifically for sticker sellers and small stationery businesses.
Invoice Generator
Create clean, printable invoices for every sale in seconds.
Inventory Tracker
Know exactly what you have in stock before you sell out.
Postage Calculator
Calculate shipping costs by weight and destination, fast.
Address Book
Save your repeat customers and ship without re-typing addresses.
Sale Calendar
Plan your drops, markets, and online sales all in one view.
Simple Pricing
Everything you need to sell stickers, stationery, and more — and to stay organized.
- Customer Address Book
- Inventory Tracker
- Sale Calendar
- Everything in Starter
- Invoice Generator
- Postage Calculator
- Priority Support
Sticker & Stationery Sellers Love It
"I used to track everything in a notes app. Happy Mail HQ changed my life — I can actually see my inventory now!"
@strawberry.sends
Etsy seller
"The invoice generator alone is worth it. My buyers love how professional it looks."
@paperlove.co
Sticker artist
"The sale calendar keeps me on track for every market and online drop. No more missed dates!"
@confetticraft
Small biz owner
Ready to get organized?
Join hundreds of sticker sellers who've ditched the chaos.
Cancel anytime. No contracts.