What are some alternatives?
When comparing tus.io and CarrierWave, 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
Uploadcare - CDN, content delivery, content delivery network, file handling, image processing, cloud storage.
Uppload - File uploading widget with 20+ plugins, no backend required
Transloadit - Versatile file uploading and processing service for developers
Paperclip - A faster way to user interfaces for React applications