DOCS
Everything you need to run it.
SynthOS is a native macOS app — the AI operating system for a company of one. You say what you want in plain language, and it dispatches AI agents that actually do the work: running command-line tools, driving the browser, editing your files, and creating assets — in parallel, on your Mac, with a receipt for every action. Everything those agents do files into an Obsidian-compatible knowledge vault you own, auto-linked into a living graph you can watch grow — a company brain that compounds instead of resetting every session. You bring your own AI provider key with no markup, it asks before anything risky, and it all runs on a machine you control — with your vault synced to a private cloud you can switch off.
GETTING STARTED
From download to your first run.
Three steps. You bring an AI provider key; SynthOS does the rest on your Mac.
Download for macOS
Native app for macOS 15 or later on Apple silicon — not a web wrapper. Sign in only to sync and manage your plan.
Add your provider key
Paste your own AI provider key. No token markup — that bill stays between you and your provider. Your key is stored locally on your Mac.
Give it a job
Ask in plain language. SynthOS picks the tools and does the real work — and every step shows up as a card you can read, never a black box.
CONCEPTS
The four ideas that make it click.
Learn these four and the rest is intuitive.
Workers that do the work
You direct; AI agents execute — running the command-line, the browser, and your files in parallel on your Mac. One ask can become a whole crew.
A company brain you own
Everything agents do files into Obsidian-compatible markdown on your disk, auto-linked into a live graph you can watch grow. It compounds instead of resetting each session.
You stay in charge
It asks before anything risky, leaves a receipt for every action, and keeps a full local audit trail of what ran and why. Guardrails are in every tier — never an upsell.
THE SURFACES
Three ways the work actually happens.
Under one native window: a chat that executes, a terminal it drives for you, and a browser it operates — you watch each one work.
Chat that executes
Ask in plain language. SynthOS chooses the tools and gets up and does it — showing every step as a live card. No homework handed back.
The command-line, driven for you
It runs real command-line tools on your Mac to do the job — and you see the command and the result, never a hidden process.
A browser it operates
It drives the web to research, gather, and act — each step on the record. You stay in the loop with approvals before anything risky.
BROWSE THE DOCS
Every section, in one place.
The whole library, in reading order. Start at the top the first time; after that, jump to whatever you need — each page stands on its own.
Getting Started
What SynthOS is, who it's for, what you need, and the three-step path from download to your first run.
Install & First Run
Requirements, download, sign in for sync and plan only, add your provider key, and watch your first job file a receipt in the vault.
Core Concepts
The four mental models behind it: agents that execute in parallel, a vault you own, receipts and approvals, and the living graph.
Chat
Phrase a job in plain language and watch it pick tools and dispatch agents — every step a live card you can read, never a black box.
Terminal & Agents
How it runs real command-line tools on your Mac and fans one ask out into a crew of agents working in parallel, all on the record.
Browser
How it drives a real browser to research, gather, and act on the web — the line between reading and acting, and the approval that guards it on every plan.
Vault & Graph
The Obsidian-compatible markdown vault on your disk that everything files into, auto-linked into a living graph you own and watch grow.
Tools & Integrations
The built-in tool layer, connecting your own apps and command-line tools, and the MCP endpoints agents can pick up instantly.
Scheduling
Set recurring jobs that fire on their own clock while SynthOS runs and the Mac is awake — anything missed is caught up the next time you open it.
The Forge
Forge your vault into a product — a live, read-only MCP endpoint anyone you hand a token to can connect to. Metering, pricing, payouts, and a public directory are on the roadmap.
Keys & Providers
How bring-your-own-key works: add your own provider key, why there's no token markup, and where your key is stored.
Plans & Billing
How Core, Pro, Ultra, and the Founding seat map to capability — what you pay SynthOS for (the cockpit) versus what you pay your provider for (the tokens).
Security & Privacy
Your vault on your Mac, synced through a private cloud bound to your account. What syncs, what never leaves the machine, and what we don't claim.
Troubleshooting
Fix the common issues — provider and key errors, agents that won't start, and a scheduled run that didn't fire — with plain steps.
FAQ
Straight answers: it's a native macOS app, you bring your own key with no markup, your vault syncs privately, and it asks before anything risky.
GET ANSWERS
Still have questions?
Pricing, the Forge, and the company are one click away — and the app ships with its own guide for everything you do inside it.
From $19/mo · Bring your own key · Private cloud sync · Cancel anytime.
Questions we didn’t answer? [email protected]