| Price from | $4.08/mo | Free |
| Free plan | — | Yes |
| Free trial | Yes | — |
| Open source | — | Yes |
| Web | — | Yes |
| Windows | Yes | Yes |
| macOS | — | Yes |
| Linux | — | Yes |
| API | — | Yes |
| Plans published | 4 | 1 |
| Spec score · Personal Knowledge Management Software | 8.4 (#13) | 8.7 (#7) |
| Integrations | OPML; askSam; theBat!; Lotus Notes | Notesium provides a Vim/Neovim plugin that uses its CLI for note finding and preview. |
| Supported platforms | Windows; browser extension for Chrome,Firefox,Edge,Opera,Brave,and Vivaldi | The maker says Notesium runs locally on Linux, macOS, and Windows. |
| Search | Global search uses Boolean syntax to find notes and attachments across notebooks, with filters and advanced operators. | The CLI, Finder and web interface provide full-text search across notes. |