What are some alternatives?
When comparing tus.io and Paperclip, you can also consider the following products
Filestack - Filestack is file uploading software designed for cloud usage applications.
Uppy - The next open source file uploader for web browsers
CarrierWave - Solution for file uploads for Rails, Sinatra and other Ruby web frameworks.
Uppload - File uploading widget with 20+ plugins, no backend required
Uploadcare - CDN, content delivery, content delivery network, file handling, image processing, cloud storage.
Transloadit - Versatile file uploading and processing service for developers