What are some alternatives?
When comparing Swype Keyboard and Fleksy Keyboard, you can also consider the following products
Swiftkey - SwiftKey keyboard allows for seamless typing and adapts to the way you type, so you can spend less time correcting typos and more time saying what you mean.
TouchPal Keyboard - Unique patented technologies of TouchPal Keyboard:
AnySoftKeyboard - Android (f/w 1.5+) on-screen keyboard for multiple languages.
Multiling O Keyboard - Super lightweight (~ 1/3 MB) yet flexible and powerful soft keyboard.
Hacker's Keyboard - Are you missing the key layout you're used to from your computer when using an Android device?
Gboard - Google-powered keyboard with search, GIFs, emojis and more!