Industry analysts believe that the next $100 billion dollar business will be mobile. Already, many of the largest businesses in the technology world have a mobile component and more are being added every day. But amidst this incredible diversity of fields that can benefit from a mobile offering, where will the true titan of mobile emerge? Here are three hotspots that we believe could easily produce the next major business in the mobile field.

Messaging

With Facebook spending $19 billion on Whatsapp, there is no question that mobile messaging has taken off. The big question for mobile messaging, then, is monetization. Whatsapp pledges to never show ads to its users, and charges $0.99/year. Likewise, Facebook has assured Whatsapp that they will not have to compromise their principles.

This presents an interesting problem for mobile messaging companies with ethics similar to Whatsapp. The first to solve it in a financially viable way will likely be the winner, and could definitely be the first massive mobile company.

Commerce

Shopping is transitioning towards m-commerce with new apps that beautifully showcase products. While massive e-commerce sites like Amazon may have a reasonable foothold on the mobile commerce space, there is still a lot of uncertainty in their mobile offerings.

One of the problems with the modern shopping experience is the massive catalogs of products available to consumers. Smaller e-commerce sites can target individuals to a greater degree and offer a more commoditized product than the big guys. Mobile commerce companies have access to more options than their desktop counterparts, such as better location data and the ability to use push notifications.

Purchasing

Mobile commerce isn’t just about the nice shopping apps that are prominent in the App Store, it is also about making payment more seamless, and the startup that can really get the payment system down will be on top.

With iOS 8, Apple is allowing third party developers to begin using the fingerprint sensor found on the iPhone 5S and newer devices. Some mobile commerce startups will be able to use this functionality to make purchases even simpler, all you need is one finger. This functionality could even be used to have multiple payment methods on one device; one for each member of the family depending on the fingerprint.

Mobile is huge, but even though we’re starting to see some front runners emerge, the kings of mobile have yet to be crowned. It is entirely possible that nobody has even heard of the new billion dollar companies yet. The possibilities are endless.

This post was guest authored by Justin Fowler. Justin is a student at the University of Texas at Austin and the co-founder of Audio Press. You can find him on Twitter and on his blog.