The 2am problem that started everything
I was debugging a project late at night.
Terminal in tab 1. AI chat in tab 2. IDE in tab 3.
Browser in tab 4. Copy-pasting errors into ChatGPT,
paying $20/mo for it, knowing it was marking up every
single token I sent through their API.
Also the coding agent? Arghh, you need some crazy detailed prompt to even get something real!
I had a thought I couldn't shake:
We have AI that can write code, debug systems, and reason
about complex problems — and our workflow is still more
fragmented than a 1990s desktop.
So I built Syntex AI OS.
What it is
A full windowed desktop environment. In a browser tab.
No install. No setup.
Here's everything running inside it right now:
- 🖥️ Full windowed desktop — real OS experience, in a tab
- 💻 IDE — VS Code's engine, local filesystem access
- 🔧 Self-healing terminal — AI watches stdout/stderr and auto-fixes errors before you finish reading them
- 🔑 OpenRouter BYOK — 300+ models, one key, zero markup
- 🎙️ Voice input
- 🛡️ Zero-knowledge — your keys never leave your browser
The architecture decision I'm most proud of
Most AI tools make money two ways: monthly subscription +
API markup. You pay $20/mo and then they charge you more
per token than if you went direct.
Syntex does neither.
You bring your own OpenRouter key. It gets stored in your
browser's localStorage — encrypted, local, never transmitted
to our servers. When you send a message, it goes:
Your browser → OpenRouter → Anthropic/OpenAI/Google
We're not in that chain. We take zero margin. You pay
providers at their published rates.
That's not a feature. It's a philosophy.
The self-healing terminal
This is the one that surprises people most.
The terminal watches your command output in real time.
When it detects an error pattern, SyntexAI:
- Reads the full error context
- Diagnoses the root cause
- Suggests or auto-applies a fix
- Retries the command
It caught a missing dependency error in a demo and fixed
it before I even finished reading the stack trace.
That's when I knew this was real.
What's coming
AgentTeX Swarm — 3 parallel AI agents running
simultaneously, coordinating on complex tasks.
This one unlocks at 100k users.
Syntex Confab — end-to-end encrypted multiplayer chat.
SyntexAI Vision — live desktop streaming with
AI vision control.
Try it
Pro tier is free for everyone right now — not a trial,
not a beta. Free until we hit 100,000 users as a community
milestone.
→
Also launched on Product Hunt today if you want to support
and leave feedback:
Brutal feedback welcome. What would make this your
default workspace?`
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