Oh wow. Just heard the Notesnook is on the front page of HN. I am the co-founder so if you have any questions, feel free to ask.
Oh and to clear a few confusions:
1. Notesnook is 100% open source. That includes the server, client apps, and everything else. It's not partially open source.
2. Zero knowledge does not mean Zero Knowledge Proof but Zero Knowledge as in we, the company and people behind Notesnook, have no knowledge regarding what you have in your notes. I see that this might be more accurately called "no knowledge".
Oh and to clear a few confusions:
1. Notesnook is 100% open source. That includes the server, client apps, and everything else. It's not partially open source.
2. Zero knowledge does not mean Zero Knowledge Proof but Zero Knowledge as in we, the company and people behind Notesnook, have no knowledge regarding what you have in your notes. I see that this might be more accurately called "no knowledge".