What are some alternatives?
When comparing Caption This and Captioned, you can also consider the following products
Caption - Open-source captioning tool to help find the right subtitles.
Quik by GoPro - Easiest way to create awesome videos
Speechyard - Learn English online through movies!
Pretty Captions - Create beautiful captions for Instagram and other platforms
VEED Subtitle - A simple & fast way to add subtitles to your videos online
MotionDen - Free online animated video maker