Why WhatsApp
The money interface should be where people already are.
Two billion people already use it
WhatsApp is the default way Latin America communicates. Families, businesses, friend groups -- the conversations that matter already happen there. Over 2 billion people use WhatsApp worldwide, and in countries like Brazil, Colombia, Mexico, and Argentina, it is as essential as electricity.
No new app to download
Every new app is a barrier. A download, an account, a password, a learning curve. Most people will not go through that for a financial tool they have never heard of. Sippy meets people where they already are. If you have WhatsApp, you have Sippy. There is nothing to install.
Works on any phone
WhatsApp runs on low-end Android devices, older iPhones, and everything in between. It works on slow connections and limited data plans. That matters in a region where the average phone is not a flagship and mobile data is not unlimited. A financial tool that requires a modern smartphone or fast internet is not a financial tool for everyone.
Sending money should feel like sending a message
The best interface for money is the one people already understand. You do not teach someone a new app -- you let them do what they already do. "Send 20 to Maria" is a WhatsApp message. It just happens to move real dollars.
Trust is inherited
People trust WhatsApp because they use it every day. That baseline familiarity lowers the anxiety that comes with trying a new financial product. There is no unfamiliar login screen, no sterile banking UI. The conversation feels normal, because it is a normal conversation -- one that happens to include money.