Four social networks that will rival Facebook and Twitter in 2015

3. Ello

Because its manifesto states that it doesn't collect user data for advertising purposes, Ello is expected to make a big entrance into the 2015 social media scene. While it does collect some user data for its own use, there is an option that allows people to opt out of data collection entirely. Whatever users choose to allow, Ello is ad-free, unlike most other networks.

These data collection policies aren't the only reason Ello is so highly anticipated - it also has the bare-bones, minimalist design expected to be a big trend this upcoming year.

4. Quora

Perhaps the most unique social media site on the list, Quora is a social platform for users to share expertise on a wide variety of topics. A cross between a social network and a wiki, Quora allows users to post short blog posts about their topics and answer any questions others may have.

However, Quora's stated mission "to share and grow the world's knowledge" through social media is realised through a platform that looks and feels very similar to Facebook. It's difficult to say how Quora will fare in 2015, but if it can adapt to mobile use through simplistic design and ease of use, it may be one of the top growing networks this year.

Although Facebook and Twitter have several changes planned for the upcoming year, it's doubtless more difficult for these massive networks to react to public demand as quickly and efficiently as these smaller, streamlined upstarts. Although adapting to mobile-friendly design and use is the most important trend this year, only time will tell which of these networks - if any - will make it big.