Obsidian vs Obsidium

Obsidian is a note-taking app for keeping thoughts in linked notes. It saves notes as plain-text Markdown files on your device, where they remain accessible offline. Its Graph view shows relationships formed by internal links, and Canvas provides an open space to arrange notes alongside attachments and web pages. The app includes core plugins and supports community plugins, themes, and an open API for customization. The Web Clipper is available for Chrome, Safari, Firefox, Edge, Brave, Arc, Orion, and Vivaldi. Obsidian has a free plan at free, with no sign-up required. Optional Sync plans cost $5 a month for Sync Standard or $10 a month for Sync Plus; their storage and file-size limits differ. Publish costs $10 a month and hosts a site up to 4GB. Obsidian says Sync uses AES-256 end-to-end encryption, and its security page lists third-party audits. Listed platforms include Android, iOS, Linux, macOS, and Windows, plus extension support.

Obsidium protects 32-bit and 64-bit Windows software and games against reverse engineering, unauthorized modification, and redistribution while adding licensing controls. It handles native EXE, DLL, and SCR files plus .NET Framework 4.x executables, supporting Windows XP through Windows 11. Selected native code can be converted into bytecode for a virtual CPU. Licensing uses RSA or elliptic-curve cryptography, with expiration dates, hardware locking, and code encryption tied to licenses. Time trials can end on a date, after days or executions, or after specified application actions. Security tools include integrity checks, encrypted data files, anti-disassembly and anti-debugging measures, and license-key blacklisting. An SDK provides examples for C/C++, Delphi, Rust, C#, Visual Basic, PureBasic, and other languages. A key-generation library is available as a Windows DLL and Linux CGI. Network Licensing distributes floating licenses through a local corporate-network service. Obsidium is paid, has no free plan, and offers a free trial.