Self-Hosted Obsidian Alternatives

Why people look for a Obsidian alternative

Obsidian is a genuinely excellent tool and, to its credit, your notes stay as plain files on your disk. The friction is around it: syncing across devices is a paid add-on, publishing costs more, and the app itself is closed source. For a tool holding a decade of your thinking, being able to run the whole stack yourself is worth having.

Which one should you pick?

SiYuan is the closest match to Obsidian's block-reference model and ships its own sync. Trilium Notes is the better fit if your notes are deeply hierarchical and you want a tree structure rather than a graph. Both keep your data in formats you can read without the app.

Before you migrate

Self-hosting means you are the one who gets paged when something breaks at 11pm. Before committing, be honest about three things:

• Where will it run? A €4/month VPS handles most of these comfortably. A NAS or spare mini PC is even cheaper if you already own one.
• Who backs it up? A self-hosted service with no backup is worse than a cloud service, because at least the cloud service had someone else's redundancy. Set up automated backups before you migrate real data into it.
• How will you reach it remotely? Most people start with a WireGuard or Tailscale tunnel rather than exposing ports directly. That is the right instinct.

Migrating your data

Nearly every Obsidian competitor listed above ships an import path — CSV, JSON, or a documented export format. The practical move is to migrate one project or one folder first, run both systems side by side for a week, and only then cut over. Export formats are rarely as clean as the marketing suggests, and it is much easier to notice a broken import on a test set than on five years of records.