The Obsidian alternative with built-in AI
If you love Obsidian’s local-first, plain-file philosophy but wish AI, semantic search and audio transcription came in the box, NoteBrain is for you. Same local-first contract on desktop - plain files on your disk - with native Ollama AI, always-on hybrid RAG, and rich editors that work out of the box.
The pricing, straight. Obsidian Sync is $4/mo (billed annually; $5 month-to-month) for 1 GB of bare sync with no AI. NoteBrain Cloud is 4€/mo for 2 GB of sync plus managed AI - or stay free and DIY-sync via iCloud / Dropbox / Syncthing, exactly as you would with an Obsidian vault.
NoteBrain Desktop is the closest match to Obsidian’s vault model. The free Desktop app (macOS, Windows, Linux) stores notes as plain files on your disk and runs Ollama locally for offline AI. The free Web app at app.notebrain.ai keeps notes in your browser’s IndexedDB and uses cloud AI. An optional Cloud subscription (sync + AI from 4€/mo) adds the managed cross-device access Obsidian charges for separately via Sync.
Why people pair NoteBrain with (or move from) Obsidian
- AI is first-party, not a plugin chain. Hook a local Ollama model in one click and chat with your notes - no Smart Connections plus embeddings setup plus API-key juggling. Obsidian ships no first-party AI.
- Always-on hybrid RAG. Full-text + local vector search over your vault on desktop, with embeddings generated locally via TransformersJS. Obsidian needs a plugin and your own embeddings for any semantic search.
- Native audio recording + transcription. Record and transcribe locally with Whisper / Parakeet on desktop. Obsidian has no native audio capture.
- Native kanban & gantt. In Obsidian these are community plugins; in NoteBrain they’re built in. (Credit where due: Obsidian does ship native Canvas and native Bases tables.)
- Same local-first contract on desktop. Notes are plain files on disk - read them with any editor, sync them with iCloud / Dropbox / Syncthing if you like.
NoteBrain vs Obsidian compared
| Feature | NoteBrain DesktopFree app · local files · plans optional | NoteBrain Web / CloudFree web · Cloud from 4€/mo | Obsidian |
|---|---|---|---|
| Price & plans | |||
| Free plan (no account) | Yes - no account | Web: yes Cloud: account needed | Yes - free incl. commercial use since 2025, no account |
| Paid entry - what it unlocks | Free | Cloud from 4€/mo: 2 GB sync + managed AI | Sync $4/mo (annual) / $5 monthly - 1 GB, no AI |
| AI included in the price | Yes - local / own-key, free | 100K-token AI trial; managed AI from 3€/mo | No AI at any tier |
| AI | |||
| Built-in managed AI (no key) | Via AI / Cloud plan; or local Ollama / key | Cloud: yes (Gemini Flash) | No first-party AI |
| Local AI via Ollama (offline) | Yes - unlimited, offline | No - browser CORS blocks it | Only via community plugin + your own setup |
| Bring-your-own API key | Yes | Web: yes (Gemini/OpenAI) | Only via 3rd-party plugin (your key) |
| Audio recording + transcription | Yes - local (Whisper / Parakeet) | Yes - cloud transcription | No |
| Editors & content types | |||
| Text / markdown | Yes | Yes | Yes - native, live preview |
| Canvas / whiteboard | Yes (Excalidraw) | Yes | Yes - native Canvas |
| Kanban / board | Yes | Yes | Via community plugin |
| Gantt / timeline | Yes | Yes | Via community plugin |
| Mindmap | Yes | Yes | Via community plugin |
| Table / database | Yes | Yes | Yes - native Bases (since v1.9, 2025) |
| Todo / checklist | Yes | Yes | Markdown checkboxes (+ Tasks plugin) |
| Search | |||
| Full-text keyword search | Yes (Lunr) | Yes | Yes - native, regex / filters |
| Semantic / vector RAG search | Yes - local hybrid, offline | Web: keyword only Cloud: server hybrid | No native - plugin + your embeddings |
| Data ownership & privacy | |||
| Notes as local plain files on disk | Yes (markdown + JSON for some editors) | No (Web: IndexedDB / Cloud: managed) | Yes - 100% plain markdown + YAMLmore portable across the whole product |
| Open source | No | No | No - proprietary freeware (only Web Clipper is OSS) |
| End-to-end encryption | Local - your disk | Cloud: optional E2E (disables share/collab) | Sync: AES-256 E2E by default |
| Operator / jurisdiction | Your machine | StarObject S.A., Luxembourg (EU) | Dynalist Inc., Canada |
| Sync & devices | |||
| Multi-device sync | DIY or Cloud plan | Cloud from 4€/mo - 2 GB + AI | Sync $4/mo - 1 GB, no AI ($8/mo for 10 GB, up to 100 GB, 12-mo history, shared-vault); or free DIY |
| Mobile access | - | Responsive web app | Native iOS + Android appsstronger than NoteBrain |
| Collaboration | |||
| Real-time multi-user co-editing | Via Cloud plan (flag-gated) | Cloud: optional real-time (flag-gated) | No character-level co-editing; Sync Plus shared vaults sync files in real time across the team |
| Import / export | |||
| Import | Notion, Obsidian vault, Markdown, folder | Notion, Obsidian vault, Markdown, folder | Notion, Evernote, Apple/OneNote, Keep, Roam, Bear, HTML, Markdown |
| Export / portability | Markdown + ZIP (full) | Markdown + ZIP | Files are already markdown - trivial, best-in-class |
| Setup | |||
| Setup time | Seconds (installer) | Seconds (open URL) | Seconds (download, no account) |
When Obsidian is the better choice
Obsidian is the stronger choice if you live in plugins, mobile, or pure-markdown portability. It has a thousands-strong community plugin and theme ecosystem (fully extensible, where NoteBrain’s editors are fixed), true native iOS and Android apps with full local editing, and it’s been free for commercial use since 2025 with no account ever required. Its whole product is 100% plain Markdown + YAML, so portability is best-in-class - NoteBrain matches that only on desktop (the web app and a few editors store JSON). And Obsidian Sync ships AES-256 end-to-end encryption by default, with 1–12 month version history and shared-vault collaboration. If those outweigh built-in AI and managed convenience, Obsidian is the better fit.
Coming from Obsidian?
NoteBrain imports a vault directly: drop the folder in, keep your wiki links, attachments and folder structure. Your existing markdown stays markdown.
FAQ
Can I keep using my Obsidian vault?
Yes. Point NoteBrain at the same folder. Markdown is markdown - you can keep editing in either app, though running both on the same files at the same time isn’t recommended.
Does NoteBrain support wiki-style [[links]]?
Yes, with backlinks, unresolved-link detection, and a graph view.
Does Obsidian have built-in AI?
No. Obsidian ships no first-party AI at any tier; AI is only available through community plugins where you bring (and pay for) your own API key or run your own model. NoteBrain has native local Ollama AI plus optional managed cloud AI.
Is either app open source?
Neither core app is. Obsidian is proprietary freeware (only its Web Clipper extension is open source), and NoteBrain is closed-source too, though the free desktop app is distributed via GitHub. Both keep your notes in open formats you can export at any time.