[r721]

>I've also compiled a list of many of the alternatives that have been mentioned on HN in the past: -TinyGem -Buku (FOSS) -GGather -Diigo -historio.us -espial (FOSS) -BrainTool -Larder -Are.na -ArchiveBox (FOSS)

The biggest alternative is raindrop.io?

raindrop.io Global Rank #21,503 Total Visits 2.5M (according to SimilarWeb)

diigo.com Global Rank #61,731 Total Visits 968.5K

pinboard.in Global Rank #130,249 Total Visits 499.7K

historio.us Global Rank #2,700,314 Total Visits 9.2K

Bookmark OS (bookmarkos.com) is another one I tried:

bookmarkos.com Global Rank #323,703 Total Visits 113.7K

Also Instapaper/Pocket should be mentioned as alternatives I think.