Ncrypt is described as 'org is a free, open-source, and privacy-focused online notepad. Access your notes from any web browser on any device. Private' and is an website in the Office & Productivity category. There are more than 100 alternatives to Ncrypt, not only websites but also apps for a variety of platforms, including Windows, Mac, Android and iPhone. The best alternative is Joplin, which is both free and Open Source. Other great sites and apps similar to Ncrypt are Obsidian (Free Personal), Standard Notes (Freemium, Open Source), Google Keep (Free) and Microsoft OneNote (Freemium).
Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. The notes are searchable, can be copied, tagged and modified either from the applications directly or from your own text editor.