After long search, I can add 2 additional alternatives:
- https://raindrop.io - online, free& paid. Good if no much metadata is needed. Raw data is not really accesseble
- https://en.eagle.cool/ - I LOVE it. Paid and local only. But Cross-Plattform and Dropbox sync available. Astonishing metadata management for all types of media. Automatically saves source url when browser-plugin is used.