The developer notebook that fits the way you work
Terminal, notes, AI, and knowledge graph in one window. It freed up an entire screen — no more second monitor just for the terminal.
"This wasn't built to impress anyone. It was built because I needed it every day and nothing else worked the way I think."
One-time purchase — €29
Why NotesCodex
The problem with your current workflow
Notes in one app, terminal in another, snippets in a .txt, commands you Google every time, AI in a browser tab. Two screens minimum. Context scattered, nothing connected.
One window, one screen. Write a note — it gets classified. Open a terminal — split it, color the tabs, group them. Close the app, reopen tomorrow — everything is exactly where you left it. Zero daily setup.
Features
Everything you need, nothing you don't
Built for developers who document their work. No bloat, no cloud lock-in, no monthly fees.
A full terminal lives inside the app. Split it in two panes to run parallel tasks. Before this, you needed a second screen just for the terminal — now it's one window.
Close the app with 8 tabs open, some split, each in a different directory. Reopen it — everything is exactly where you left off. Tabs, splits, paths, colors, groups.
Right-click any terminal tab to assign a color. When you have 10+ tabs open, colors let you spot the ones you're working on instantly — without reading every name.
Assign tabs to named groups. Working on two projects? Put each in its own group and switch with one click. Tabs you're not using stay alive in the background.
Every note gets auto-tagged, categorized, and summarized the moment you save it. Use cloud AI or run it entirely on your machine — no account, no cost, no data sent anywhere.
Click Agent, describe a task, press Enter. An AI agent works autonomously in your terminal while you focus on something else. A green dot appears when it's done.
Your notes form a visual map. The AI discovers connections automatically — related topics, dependencies, contradictions. Navigate your knowledge instead of searching for it.
One click switches between horizontal and vertical layouts. Using a portrait monitor? The entire interface rearranges instantly. No other note app does this.
All data stored locally on your machine. Cloud sync is optional and fully under your control — you set up your own sync, we never touch your data.
No subscription. No "free tier with limits". One purchase, lifetime license, all future updates included. The software is yours.
How it works
Up and running in 60 seconds
No accounts, no configuration, no onboarding wizard.
Download the installer, run it. That's it. No account creation, no email verification.
Drop notes, code snippets, commands, logs. The AI classifies and tags everything automatically.
Open the terminal, split panes, run builds. Launch Claude Agent for autonomous tasks. Your notes and terminal in one window.
Configure AI provider, Claude Agent, and cloud sync — all optional.
Comparison
How NotesCodex compares
We focused on what developers actually need instead of building another generic notes app.
| Feature | NotesCodex | Obsidian | Notion |
|---|---|---|---|
| Integrated terminal | Split panes | No | No |
| Terminal session persistence | Tabs, splits, paths | No terminal | No terminal |
| Tab colors & groups | Built-in | No | No |
| AI auto-classification | Built-in | Plugin | Built-in (paid) |
| Local AI (no cloud) | Built-in | Plugin | No |
| Terminal AI agent | Claude Code | No | No terminal |
| Knowledge graph | Auto-edges | Manual | No |
| Monitor layouts | One-click switch | No | No |
| Data ownership | 100% local | Local files | Cloud + offline |
| Pricing | €29 once | Free + $4/mo sync | $10/mo |
Integrated terminal
Terminal session persistence
Tab colors & groups
AI auto-classification
Local AI (no cloud)
Terminal AI agent
Knowledge graph
Monitor layouts
Data ownership
Pricing
Who is it for
Built for people who build things
NotesCodex sits where your notes meet your terminal. If any of these sound like you, it was made for your workflow.
You write code, debug, deploy, and document — often at the same time. You need your terminal, your notes, and your AI in one window instead of alt-tabbing between 5 apps.
You run commands all day and forget which fix worked last Tuesday. NotesCodex captures your commands, tags them automatically, and lets you search them by what they do.
Architecture decisions, meeting notes, code reviews, snippets. Everything documented and connected in a knowledge graph you can actually navigate.
Multiple projects, multiple clients, zero time to organize. The AI handles tagging and project assignment. You search "that nginx fix for client X" and actually find it.
Your notes contain credentials, internal URLs, proprietary code. NotesCodex runs 100% on your machine — including the AI. No cloud required.
Honest take
NotesCodex is not for everyone
And that's fine. Here's how to tell if it fits your workflow.
- You take notes fast and organize later
- You work in the terminal daily
- You want AI to connect your notes, not just store them
- You care about owning your data
- You're tired of paying monthly for tools you barely use
- You prefer visual, drag-and-drop note editors like Notion
- You need real-time collaboration with a team
- You never use a terminal
- You want a polished, consumer-grade experience — this is a power tool
Common questions
Pricing
Simple, honest pricing
No tiers. No upsells. No "contact sales".
€29
One-time payment — lifetime license
- All features included
- All future updates
- Windows + macOS
- Local AI included — no extra cost
- Cloud sync — your infrastructure, free
- No data collection, no telemetry