What are some alternatives?
When comparing Marvelous DB and webcomic.app, you can also consider the following products
Marvel (Comics) API - Create awesome stuff with the world's greatest comic API
GlobalComix - Professional Comics Publishing
Comixology Unlimited - Netflix for comics and graphics novels by Amazon
Comic Cruncher - Visualize appearances per year of comic book characters 💥
Piperka - Webcomics listing and subscription manager
Storyboard - Press kit platform