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The AI operating system for founders

The part of you
that didn't know
existed.

FCOS Symbiote is the AI that fuses with you. Not a chatbot. Not a tool. A partner that knows your business, builds with you, and gets more powerful the longer you use it.

Start for free → Meet your symbiotes
FCOS Symbiote
It validates your idea before you waste time on it.
It plans your business while you sleep.
It builds your product while you think about the next one.
It runs your operations while you focus on growth.

One AI partner. Every stage of your journey.

FCOS Build FCOS Brainz Business Brain Sprint Tracker
The Specialist Network

Not one AI. A whole team.

Each symbiote specialises in one area. Together they cover everything your business needs.

FCOS Symbiote
FCOS Symbiote
The Orchestrator
FCOS Build
FCOS Build
Deep coding intelligence
FCOS Brainz
FCOS Brainz
Knowledge & strategy
Business Brain
Business Brain
Financial intelligence
Meet all 13 symbiotes →
The Platform

Every tool you need. Already built.

🧠
FCOS Think Tank
Your AI business partner
✍️
FCOS Synapse
Your document workspace
📁
FCOS Sprint
Your file manager
💻
FCOS Build IDE
Your coding environment
🧬
FCOS Brainz
Your symbiote builder
🏪
FCOS Store
Publish apps, earn 93%

Use everything. Use one. Use them as integrations. Your choice.

The Store Economy
93%

Of every sale you make in the FCOS Store, 93% is yours.

We take 7% — split between advertising your app, promoting you, and rewarding the community that helped your app succeed.

No greed. No lock-in. The platform that makes money with you.

See the store →
Desktop App

Now on desktop.

FCOS Symbiote is available as a native Windows app. Free to download. Your entire AI team in one window.

Download for Windows →

macOS and Linux also available.

Early Access

“That looks really fucking cool. Excuse my language. Thankyou xx”

Sydney — early access user
FCOS Symbiote

Ready to fuse with your symbiote?

Free to start. No credit card. Your business partner is waiting.

Get started free →