Couchdrop offers two upload portals. Both portals can be whitelabelled or branded with your own business branding.
Upload portal with credentials
The URL to be used for this service is https://upload.couchdrop.io
To use this service, create a new user under https://my.couchdrop.io/manage/users and make sure that allow upload portal is enabled.
Have your user navigate to upload.couchdrop.io, enter their user credentials then they simply drop their file(s) in the area provided and start the upload.
Anonymous upload portal
Head to your Virtual File Storage within Couchdrop and press the three dots to the right of the folder you would like to have the files go into. Select Properties
Then scroll down to Upload Portal, all you need to do is tick Enabled, then Save Settings at the bottom of the page. Once saved a URL will appear, provide your user the link provided.
The created URL will enable your user to upload files anonymously and without credentials.