How is this different from Pocket which has better integration and is free? If the tool can automatically organize all my bookmarks (with some hint here and there), that would be much easier.

Workflow can be -

1. Initially, user creates some top-level categories manually. Ex. programming languages, philosophy, art, computer networks, etc.

2. Tool starts filing bookmarks under these top level categories and further creates sub-categories by itself where it's obvious (e.g. under prog lang - python, js, java, etc)

3. Only if the tool is unable to find categories clearly, it should require user's attention.

For #2, tool should use factors like content, tags used by author in article, what type of content website usually posts, etc and generate score. If multiple categories above 90% score, bookmark under all those categories.