Octarine
Local-first Markdown notes app with BYO-key AI, sold as a one-time $79 lifetime license
0Visit Octarine
octarine.appAbout Octarine
Octarine is a Markdown note-taking app for people who want the local-first, plain-file guarantees of Obsidian with a tighter, more opinionated default experience and an AI layer that does not phone home. It is bootstrapped and built by a single developer, sold as a one-time $79 license rather than a subscription, and the AI features deliberately require you to bring your own API key or point at a local LLM — so the writing assistant, chat-with-your-notes and weekly AI recap run on infrastructure you control and cost you nothing extra in app fees. The core is a WYSIWYG Markdown editor with unlimited workspaces, daily and weekly notes, a graph view and full-text search, and task migration between days for people running a daily-log workflow. Pro layers on templates, pinned notes and folders, per-folder sorting, custom filtered views, note properties, a theme creator, focus mode, video annotation, note types, related notes, read-only notes and note sharing, plus export to PDF, HTML and DOCX rather than plain text only. macOS, Windows and Linux builds all exist and one license key covers three devices simultaneously with unlimited deactivations, and it includes access to the iOS app. The tradeoff is exactly what the pricing implies: no venture backing means slower development and a smaller plugin ecosystem than the incumbents.
Does ChatGPT recommend your AI tool?
If you're building in Productivity, run a free AI-visibility scan on your own product — we ask ChatGPT across 5 prompt angles and score how often you get named. ~30 seconds, no signup, no card.
Key Features
Octarine Pros & Cons
✅ Pros
- +One-time $79 with lifetime updates beats a recurring notes subscription quickly
- +BYO-key AI means no per-token markup and no data leaving your control
- +Bootstrapped and answerable to users rather than a growth roadmap
⚠️ Cons
- −No plugin ecosystem to compare with Obsidian's
- −Solo developer means a real bus factor on a tool holding your notes
- −AI features are useless until you supply a key or run a local model
Tags
Is Octarine your tool?
This is the page buyers and AI assistants read when they look up Octarine. Claim your listing for $19 one-time — no subscription, nothing to cancel — and take a capped slot in your category: each one sells a fixed number, and yours ranks above every free tool in it, with a Featured badge. Prefer it ongoing? Monthly is one click away on the next page.
Complete Your Productivity Stack
Other productivity tools in our catalog:
Gamma
Try FreeAI presentation builder
Turn ideas into polished decks instantly
AdCreative.ai
Try FreeAI-powered ad creatives
Generate marketing visuals in seconds
SEMrush
Try FreeAll-in-one SEO toolkit
Optimize content for maximum reach
💰 Affiliate disclosure: We may earn a commission if you sign up through these links at no extra cost to you.
Stay updated on Productivity tools — join our weekly newsletter
One concise email with fresh launches, trending picks, and featured standouts.
Alternatives to Octarine
View all Octarine alternatives →More Productivity tools
NotchNook Pro
The original notch app for Mac, taken to the next level.
ScribeTo
Transcribe video and audio to text online — upload a file, paste a YouTube/TikTok link, or record live.
SnapCard
Sports card, Pokémon and TCG card scanner for iPhone. Names the exact card, shows recent sales and pre-grades it.
ODLUCK
Free random generators in the browser—numbers passwords colors cards animals countries and more.
OfferCC
Live desktop AI interview assistant with overlay for coding and spoken answers.
oKiKo
Read WhatsApp messages in your language and preview replies in your contact’s language.
Agent connectivity: not yet verified