When comparing Razer Cortex: Gamecaster vs ScreenFlow, the Slant community recommends ScreenFlow for most people. In the question“What are the best tools for recording gameplay videos?” ScreenFlow is ranked 7th while Razer Cortex: Gamecaster is ranked 9th.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Recording and streaming features
Stream to YouTube, Twitch, Azubu and Hitbox.
Record game footage and take screenshots without any watermarks and at any resolution (free version)
Pro Additional Razer Cortex features
Game launcher with boosting features to improve frames per second and a digital price comparison engine (Deals)
Pro Free to use
No streaming watermark up to 720p (maximum streaming resolution 1080p with watermark), 30 frames per second
Pro Easy to use
No complicated setups, clean UI, custom hotkeys for all the core features
Pro Can export to animated GIFs
Pro Non-expiring trial available
The free trial never expires, however it will place a sizable "Demo Mode' watermark over the middle of the screen which makes the content unusable for anything other than trying it out.
Pro Suitable for novices and experts alike
Start creating vanilla screencasts. Continue exploring a plethora of presentation and editing features. You won't ever grow out of this "shirt".
Pro Records your iOS device too
You can plug your iOS device into your Mac, and record the screen through your Mac. You can find details on how to do this here.
Cons
Con Doesn't run properly
It crashes multiple times. Removed from the Cortex bundle officially. You have to download the previous version, but still doesn't work properly.
Con Creates large (e.g. mp4) files
Work-around: Export using lossless codec, then use Handbrake to create your production mp4.
Con Free version produces virtually unusable content
The free trial adds a large watermark to the middle of the screen which makes the video virtually unusable. Most trials expire after a week or two, however the content you create with them can still be used.