What are some alternatives?
When comparing Caption This and Instaspacer, you can also consider the following products
Caption - Open-source captioning tool to help find the right subtitles.
Pretty Captions - Create beautiful captions for Instagram and other platforms
Speechyard - Learn English online through movies!
Drake Captions - Find the perfect Drake lyric for your Instagram caption
Captioned - Say, show, share. Create a 60 second captioned video.
VEED Subtitle - A simple & fast way to add subtitles to your videos online