How to counter Ryze
Let us take a look on how to beat Ryze. We will look at champions who are strong against Ryze and who are weak against Ryze. Use win rate, gold difference and creep score difference at minute 10 to find the best 
Mid champion who counters Ryze. You can already win in champion select with the right counters for Ryze. If you want to know how to counter Ryze then you need to take into account the best picks vs Ryze and the worst picks vs Ryze. This Ryze counter data is based on matches played by Pros on patch 14.23 and previous ones. It is important to see whether Pros counter picked Ryze or whether they played as Ryze.
Champions used by Pros to counter pick Ryze
Looking at the matches from Pros (see table Pros counter picked Ryze) we can see that they picked 
Sylas most often to counter pick Ryze. The matchup Sylas vs Ryze occured 21 times. Ryze has 12 wins and 9 losses in this matchup. Learn how to counter pick Sylas to get another perspective on the data.
Lane outcome for Ryze
When looking at Ryze counters you will notice that win rates alone are not conclusional. Therefore we provide an overview (see table Lane Outcome) where you can see the lane outcome of Pros who played Ryze. The lane outcome of Ryze consists of three outcomes: Win, Loss or Draw. Let's take a look of Ryze lane and match outcome for specific matchups. Considering the lane outcome and the match outcome of a specific matchup, might enable you to find the right counter for Ryze.
Conclusion
Analyze the available data and learn how to beat Ryze. To master Ryze take also a look on Ryze builds and runes for Ryze. Good luck, Summoner!