About StampBook

StampBook is a billing and invoicing app built by Mandal Industries in India. We started it because many freelancers and small shops still bill with paper slips, Word files or spreadsheets, and lose track of who has paid and who has not.

What we are trying to do

Our goal is simple: let a small business create a clean, numbered invoice in under a minute, share it where customers already are (WhatsApp), and make paying it as easy as scanning a QR code. We want you to spend time on your craft, not on paperwork.

What we believe

• Keep it simple. Small businesses do not need complicated accounting software to send a good invoice.
• Your money is yours. Payments go directly to your UPI ID or your own gateway account.
• Your data is yours. You own your clients and invoices, and you can ask us to delete your account.
• Be useful for free. The app is free to use and supported by ads, with an ad-free option for those who prefer it.

Free guides

We also publish plain-language guides on GST invoices, payment terms and getting paid in our blog. They are written by our team for business owners, and we update them as rules change.

Get in touch

We read every message. Write to stampbook03@gmail.com or see the contact page.