What are some alternatives?
When comparing Caption Cat and Bold, you can also consider the following products
Pretty Captions - Create beautiful captions for Instagram and other platforms
Ghost - Ghost is a fully open source, adaptable platform for building and running a modern online publication. We power blogs, magazines and journalists from Zappos to Sky News.
Instaspacer - Putting the spaces back into Instagram
Typorama - Typorama: Text on Photo Editor is a Typography Art and Poster Maker application created and published by Apperto Ltd.
Captioned - Say, show, share. Create a 60 second captioned video.
Caramella - A clean, modern blogging platform without the fuss