Alternatives
Custom GPTs vs a shared company context
Both put your company's knowledge into AI conversations. They solve different problems, and plenty of teams need only one of them. Here's how to tell which.
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If your team lives in ChatGPT and you need the same task done the same way repeatedly, a Custom GPT is a genuinely good tool. You write the instructions once, attach a few files, share the link, and everyone gets a consistent assistant for that task. For a proposal-writer GPT or a support-reply GPT, that's often enough.
Company Brain is the alternative for company knowledge that has outgrown a single Custom GPT. It holds your facts, pricing, terminology and rules in one reviewed place and delivers them through MCP to ChatGPT, Claude, Copilot and Cursor, so every tool, and every Custom GPT, works from the same approved truth.
The cracks show when the knowledge inside the GPT is really company knowledge. Then it gets duplicated into the next GPT, and the one after that, and when your pricing changes someone has to remember every GPT that mentions pricing. And the moment a teammate opens Claude or Copilot instead, all of it is gone.
When a Custom GPT is enough
Stay with a Custom GPT if all three hold: your team works only in ChatGPT, the knowledge involved is specific to one task rather than the company as a whole, and one person can realistically keep the instructions current. Many small teams sit comfortably inside those lines. No reason to add anything. We wrote up where Custom GPTs work for team knowledge, and where they break from a real client's nine-GPT collection, if you want the longer version.
Where the two differ
| Custom GPTs | Company Brain | |
|---|---|---|
| Lives in | ChatGPT only | Claude, ChatGPT, Copilot, Cursor, any MCP client |
| Knowledge maintained | Per GPT, by its builder | Once, for the whole company |
| Quality control | Whatever the builder wrote | Human review before any fact goes live |
| When facts change | Edit every affected GPT | Update one place, every tool follows |
| Team consistency | Consistent within one GPT | Consistent across all tools and chats |
| Best at | Repeated single tasks | Company knowledge everywhere |
The question that decides it
Ask where your company's facts should live. If the answer is "inside the instructions of whichever GPT someone built last spring", you already know how that ends. Company Brain gives those facts one home with human review, and delivers them to every AI tool your team touches, Custom GPTs included.
Company Brain's free plan includes 50 company facts and one curator, with the whole team connected through MCP, free forever. Paid plans start at €89 per month per company, never per seat.
Frequently asked questions
- Can we use Custom GPTs and Company Brain together?
- Custom GPTs and Company Brain work well together. Keep task-specific GPTs for repeated workflows and let Company Brain supply the company facts underneath, so every GPT and every plain chat works from the same truth.
- We built a Custom GPT with our brand guidelines. What's missing?
- A brand-guidelines Custom GPT misses nothing while everyone stays in ChatGPT. It breaks when someone opens Claude or Copilot instead, or when the guidelines change and the GPT's instructions quietly go stale. Company Brain updates in one place and reaches every tool.
- Does Company Brain require ChatGPT Plus or Team?
- Company Brain does not require a specific ChatGPT plan. It connects through MCP, so it follows whatever ChatGPT plan supports connectors, and it works with Claude, Copilot and Cursor regardless.
- What does Company Brain cost?
- Company Brain's core product is free forever: 50 company facts, one curator, whole team connected. Paid plans start at €89 per month, per company, no per-seat fees.
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