The emergence of the startup scene has helped shift today’s tech industry. Companies like Dropbox, Instagram, and Spotify all introduced new technologies that went on to revolutionize the way we interact with our devices and the public. And with the masses drawn to these digital tenderfoots, all of the major tech players are making it their business to get in on the action—dishing out millions, and in some cases, billions, to buyout the competition and utilize those services to enhance their platforms. Facebook recently made this same move when it acquired the popular messaging app WhatsApp for $19 billion a few weeks ago.

Now all the heavyweights, from Apple to Twitter, are exploring the field for the next big tech acquisition. So which newcomers still remain on the auction block? Read on to find out.