The core app itself is free — local markdown files with backlinks parsed between them is genuinely achievable, well-documented work. The paid tier is really just their optional sync and publish add-ons, not the note-taking itself.
VIBE SCORE 93/100
The parts this build actually needs, each rated on its own — the average is the Vibe Score above.
| Landing page | 99 |
| CRUD database | 95 |
| Search | 86 |
Two real costs, not just "free": the AI agent's own usage, and hosting once it's running. Both are estimated from this app's own effort rating and component list — see the assumptions on the method page.
| AI agent — with a subscription (Claude Pro/Max, Cursor, etc.) | $0 marginal |
| AI agent — pay-per-use API, no subscription | $43–$86 one-time |
| Hosting, once it's running | $0/mo (free tier) |
| Domain name, if you want your own | ~$12/yr |
Obsidian costs $4/mo. Even paying per-token with no subscription, and accounting for hosting, this build pays for itself in about 22 months.
Don't feel like building it? These are already made, open-source, and free.
Build it. The core app itself is free — local markdown files with backlinks parsed between them is genuinely achievable, well-documented work. The paid tier is really just their optional sync and publish add-ons, not the note-taking itself.
Obsidian costs $4/mo (about $48/yr) as of 2026-08. That's what a working rebuild would save you.
Their plugin ecosystem, with hundreds of community extensions, represents years of third-party developer investment Multi-device sync (their actual paid product) reintroduces the same conflict-resolution problem every notes app on this register faces A polished, performant graph view at thousands of notes needs real rendering optimization
Yes — Logseq are open-source options worth trying before you build your own. Details are in the standard parts section on this page.
Closest matches on the register — ranked by the build parts they share with Obsidian, not just by category.
Browse all productivity tools · every comparison · how scoring works · the full register
An occasional email when new apps get reviewed — the verdict, the effort, and what changed. No tracking pixels, no drip sequence, one click to leave.