Obsidian alternative for macOS
Metis vs Obsidian
Obsidian popularised the local-first, Markdown-based knowledge base, and it is excellent. Metis shares the same core idea - your notes are plain .md files you own - but rebuilds the experience as a native macOS app with private on-device AI and git version history built in, no plugins required. Here is a straight comparison, including the things Obsidian still does better.
$14.99 one-time · no subscription · 7-day free trial
Fast and light at thousands of notes
No plugins, no API keys, no cloud
Snapshots and restore, built in
Feature-by-Feature Comparison
An honest side-by-side - including where Obsidian comes out ahead.
Native, not Electron
Obsidian is built on Electron - a bundled Chromium runtime. It is capable, but it carries the memory and startup cost of a browser. Metis is a native SwiftUI/AppKit app: it cold-starts instantly via a persistent index, stays light at thousands of notes, and feels like part of macOS (system text engine, native shortcuts, Quick Look-style preview).
Being native is also what makes the private AI possible: Metis can call Apple's on-device Foundation Models directly, with no API key, no plugin, and nothing leaving your Mac.
- Instant cold start via a persistent index
- Low memory at scale - no embedded browser
- Native macOS text, shortcuts, and rendering
Honest note: Electron is exactly why Obsidian runs on Windows, Linux, and mobile. Metis is macOS-only today; that is the trade-off of going native.
Private AI and git, built in - not bolted on
In Obsidian, AI and version history come from community plugins you install and configure - and most AI plugins send your notes to a cloud model with your own API key. Metis ships these as first-class, private features: summarize a note, suggest tags and links, writing assist on a selection, and Ask Vault (agentic Q&A with citations across your notes) - all on-device and offline.
Version history is built in too: make a vault a git repo and get snapshots, per-note history, side-by-side text and rendered diffs, and one-click restore - without a plugin or the command line.
- On-device summarize, tag/link suggestions, writing assist, Ask Vault
- Semantic search by meaning, on-device
- Git snapshots, diffs, and restore inside the app
Honest note: if you want a specific plugin Obsidian's community has built, Metis has no plugin system - its scope is what ships in the app.
Same files, no lock-in
Both apps treat a folder of Markdown as the source of truth, so moving between them is painless. Metis reads and writes standard Markdown with YAML front matter, supports `[[wiki links]]`, aliases, and tags, and has a Plain Markdown mode that edits an existing project folder in place (no front-matter injection, no renaming) - useful for docs/agents consumed by other tools.
You can point Obsidian and Metis at the same vault, or import an Obsidian vault (folders included) and keep working. Your data is never trapped.
Which One Is Right for You?
No tool wins on every axis. Here is where each genuinely fits.
Choose Metis if
- You want a native Mac app, not an Electron one
- You want private, on-device AI without plugins or API keys
- You want git version history with diffs built in
- You want typed properties and an agenda out of the box
- Your notes are confidential and must never touch a cloud
Choose Obsidian if
- You need Windows, Linux, or mobile apps
- You rely on specific community plugins
- You want a large, mature ecosystem and community
- You already have an Obsidian setup you are happy with
Frequently Asked Questions
Is Metis a good Obsidian alternative on Mac?
Yes, if you want the same local-first Markdown model rebuilt as a native Mac app with private on-device AI, git history, and an agenda built in. Obsidian remains the better pick if you need cross-platform or mobile apps, or you depend on its plugin ecosystem.
Can I open my existing Obsidian vault in Metis?
Yes. Metis works on a folder of plain Markdown files with YAML front matter and [[wiki links]], the same format Obsidian uses. You can import a vault (folders included) or point both apps at the same folder.
How much does Metis cost?
Metis is $14.99 one-time (per major version), with a 7-day free trial and no subscription. Obsidian is free for personal use but charges for its Sync and Publish add-ons and for commercial use. With Metis you pay once for native performance, built-in private AI, and git history.
Does Metis need plugins for AI like Obsidian does?
No. AI is built in and runs on-device via Apple Intelligence (macOS 26) - summarize, tag/link suggestions, writing assist, and Ask Vault - with nothing sent to a cloud and no API key. The app is fully functional without AI on earlier macOS.
What does Obsidian do that Metis does not?
Obsidian runs on Windows, Linux, iOS, and Android, and has a huge community plugin ecosystem and years of maturity. Metis is macOS-only today and has no plugin system - its features are what ship in the app.