Stop re-explaining your business to ChatGPT every morning.

ThirdBrain BOB — for your own business

BOB holds your client history, your decisions, and your operating context. Every workflow starts from where you left off — not from a blank chat window.

One-time purchase. Yours forever. No subscription.

What you get

Own Forever

One-time purchase. No subscriptions, no subscription cliff. Your data stays local — no cloud dependency.

Context That Persists

It learns your business and never forgets. Every skill starts from your actual context — clients, decisions, history — not a blank prompt.

Decisions to Deliverables

Type a business question, get a proposal, a plan, or a marketing brief. Not advice you still have to turn into something.

See the payoff before you buy

Two quick calculators — no email required

AI Savings Calculator

Answer a few questions about your business and see, conservatively, how many hours and how much money an AI operating vault could reclaim from your week.

→ Open the savings calculator

Time-Arbitrage Calculator

Model what happens when you stop grinding on content and redeploy the freed hours into lead response speed and follow-up — the levers that actually move revenue.

→ Open the time-arbitrage calculator

What's inside

Enforced Data Model

Every client, project, decision, and deliverable is structured automatically. Your notes link to each other. Dataview queries just work. No orphaned files, no broken context.

Customizable Workspace UI

Your dashboard, configured for your business. The BOB Workspace uses Obsidian Bases to surface what matters — without digging through folders.

Hundreds of Skills — and Growing

Served over MCP, or stored locally

BOB v2.8.0 has 389 quality-checked skills and 81 playbooks. The Starter Vault is a minimal workspace that stores only the 14 skills that set up and run the vault; every other skill, playbook and value chain is served by the skills MCP server. The Full Vault stores everything locally, for offline use. Ten skill packs (a core pack plus one per department; free and Pro are now merged) let you add skills offline. A context pack maps each skill to your own folder layout, so skills stay portable between workspaces.

Browse the full Skill Library →

Own it forever

No monthly fee. No subscription cliff. No seat limits.

What's included:

  • BOB Starter Vault (14 local skills; 389 skills and 81 playbooks over the skills MCP server)
  • Curated Obsidian plugins, pre-configured
  • Core business commands out of the box
  • Skool community access — onboarding, support, updates
  • Ten offline skill packs, one per department plus a core pack
  • All future updates

Integrates with your existing AI subscription through the Agent Client Protocol (ACP) — Claude Code, Codex, Gemini CLI, Amp, Goose, and more — or an API key if you prefer. Use whatever you already have; there's no separate subscription for BOB itself. Current pricing is on Skool.

Common questions

How is this different from just using ChatGPT?

ChatGPT starts from zero every morning. BOB already knows your clients, your pricing, your processes and your plans, because that context lives in your own vault and is loaded every time. The difference shows up on the second question, not the first.

Can I use Claude Cowork or ChatGPT with BOB?

Yes. You point either of them at the folder where your vault lives — usually a small dropdown under the box where you type your prompt. BOB is plain Markdown and skills on your own disk, so any agent that can read a local folder can work with it. You are not locked into one assistant.

What AI model does BOB use?

Any of them. BOB integrates with your AI coding agent through the Agent Client Protocol (ACP) — Claude Code, Codex, Gemini CLI, Amp, Goose, and others — so you use whichever model you prefer, on the subscription you already have (or an API key, if that's how you'd rather connect). No separate subscription for BOB.

What happens when the AI models change?

Your context does not change with them. The vault, the data model and the workflows are yours and are engine-independent — when a better model arrives, it reads the same context. That is the point of owning the brain rather than renting the chat.

Do I need to be technical?

You don't need to be a developer. BOB is structured workflows, not software development — you follow a setup guide once, then run business commands in plain language. Setup involves a desktop AI CLI and Obsidian, so expect to follow a few install steps rather than a one-click download.

What do I need to run it?

A desktop computer — Windows (with WSL), macOS, or Linux — plus Obsidian (free, recommended) and an AI coding agent you connect via ACP — Claude Code, Codex, Gemini CLI, and others — using your existing subscription or an API key. You can view and sync your vault on mobile, but the AI workflows run on desktop.

Where does my business data actually live?

In your own files, on your own machine, in plain Markdown you can read without us. There is no platform holding your data hostage, and nothing stops working if you stop paying.

How long before it is actually useful?

The first working deliverable comes out of the first session. The compounding part — where it knows enough about your business to be obviously better than a blank prompt — arrives as you feed it real work, not on a fixed schedule.

What happens after I buy?

Your purchase unlocks a course in our Skool community that holds your download link and the "Start Here" walkthrough, guiding you through installation step by step.

Is there a guarantee?

Yes — an operational-by-day-30 guarantee. If BOB isn't running for you after your first 14 days, we work with you over the next two weeks to get you fully operational by day 30 — or your money back. We don't do walk-away refunds — that leaves you stuck with the original problem.

I'm a consultant or agency — can I deliver this to my clients?

Yes. See BOB for Agencies for the licensed delivery model, branding, and partner support.

AI that knows your business. Yours forever.

One purchase. No subscription. Point it at your business and go.