By prediction do you mean you don't want suggestions, or just auto-correct? I have Swiftkey offer me suggestions but not auto-correct my typing. It just shows up on the suggestion row. I can choose to ignore it, or tap the word to input it, especially if I mistyped/misspelled something that Swiftkey got correctly.
If by auto-insert prediction (auto-correct) is what you wanted turned off, almost all keyboards have that option. I know of none that doesn't offer that switch.