The proposal system built for your team.
Proposal Brain OS . An AI proposal system, built for your team, inside the AI tools you already use.
If your proposal or presales team wants to move beyond AI prompt libraries into true agentic workflows, this is what Proposal Brain OS does.
It works with your chosen LLM (Claude, Copilot, ChatGPT, or Gemini) and connects to your proposal, sales, and revenue software, plus anything else in your sales cycle.
When setup is done, you have an end-to-end proposal workflow built on proposal-winning best practices, and a content library that runs in your AI and your existing software.
A process that gets smarter on its own
Proposal Brain OS runs on your chosen LLM. When the AI improves, your proposal process improves with it, at no extra cost and with nothing to wait for.
Claude, ChatGPT, Gemini, and Copilot are all improving on their makers' release schedules. And you own a process that compounds in value every time you use it. The skills you set up this quarter will draft better, qualify smarter, and catch more next quarter, because the engine under them got better and you paid nothing extra for the upgrade.
What Proposal Brain OS is
Proposal Brain OS is a done-for-you AI proposal workflow that stargazy configures inside your chosen LLM — Claude, ChatGPT, Microsoft Copilot, or Gemini — and connects to the proposal software you already run.
Who it's for
CROs and VPs of Sales. VPs of Revenue Operations. Heads of presales and solutions consulting. Heads of bids and proposals. Teams running competitive RFPs, who already have AI and want a real process on top of it.
It lives where your team already works
Proposal Brain OS runs inside the AI tool your company has already chosen, including Claude, ChatGPT, Gemini, or Microsoft Copilot. Your team is already in there. The process meets them where they work instead of asking them to go somewhere new.
It also works with the proposal software you already run. If you use MCP-enabled proposal automation software such as Ombud, AutoRFP.ai, or SiftHub, Proposal Brain OS connects to it, so your process and your proposal tools work together.
Your AI tool
- Claude
- ChatGPT
- Gemini
- Microsoft Copilot
Your proposal software
- Ombud
- AutoRFP.ai
- SiftHub
Built for your team specifically
Proposal Brain OS is not a bundled pack of generic prompts you could find anywhere.
During setup, stargazy configures the system to your business and to the AI platform you use, including your win themes, your tone of voice, your qualification thresholds, your reusable answers, your various software systems, your processes, and case studies.
What you end up with is your own, specific proposal process, encoded. The qualifier knows which deals fit your firm and which to walk away from. The library holds your best content wherever it's written, ready to reuse.
That is why this is worth paying a setup fee for, and why your competitors cannot copy it. The value is in the proposal configuration, and the configuration is completely yours.
1,000+
organizations researched
Win Intelligence, built into your workflows
Proposal Brain OS can include stargazy's Win Intelligence framework, drawn from our research into why teams win and lose competitive RFPs across 1,000+ organizations.
During setup, we build it into your qualify and respond workflows. Your go/no-go decisions and your drafts get checked against what separates winning bids from losing ones, not just against the RFP. The goal is simple: help your team win more of the bids it chooses to chase.
How it works
- 1
Setup
stargazy builds and configures your Proposal Brain OS on your AI platform of choice (Claude, ChatGPT, Gemini, or Microsoft Copilot) from your existing proposals, win themes, team, and content, and connects it to your proposal software where it supports MCP. You get working sessions to tune it to your team. Setup takes one to two weeks.
- 2
Handover
The system is yours. Your team runs it inside the AI tool they already use. You own the configuration.
- 3
OngoingOptional
If you would rather not maintain it yourself, stargazy runs it for you on whichever platform you use, keeping the library current, tuning the skills, and adding data and best practices to tighten quality.
Is your data safe?
Proposal Brain OS runs inside your own AI account, not ours. On business and enterprise tiers, Claude, ChatGPT, Gemini, and Copilot don't train on your content by default, and your data stays in the tenancy your IT team already approved. We configure the workflow; we don't move your content somewhere new.
Pricing
All tiers are available on Claude, ChatGPT, Gemini, and Microsoft Copilot.
Setup (one-time)
| Tier | Price | What you get |
|---|---|---|
| Starter | £4,500 / $6,500 | Four key skills, content library, and one configuration session |
| Core | £7,500 / $9,500 | All four pillars, full custom configuration, library built from your documents, two sessions, 30-day support |
| Team | £12,500 / $16,000 | Everything in Core, plus team training, one custom skill, 90-day support |
| Enterprise | Price on application | Multi-team or multi-region rollout, scoped on a call |
Managed service (optional, monthly)
| Tier | Price | What stargazy does |
|---|---|---|
| Light | £750/mo / $1,000/mo | Quarterly tune-ups, library upkeep, support |
| Managed | £1,500/mo / $2,000/mo | Monthly tune-ups, library upkeep, and support |
Who you'll be working with
Christina Carter, founder, stargazy
Christina is the founder of stargazy, the independent analyst publication for proposal and bid software. She hosts The stargazy Brief and led the editorial work behind the 2026 Proposal & Bid Software Report.
Proposal Brain OS is not set up by an associate or a junior consultant. Christina leads every setup personally.
Ready to see it working for your team?
Tell us about your proposal process and we'll get back to you by email with how Proposal Brain OS could fit.
Request a consultationFrequently asked questions
Do we need this if we already use ChatGPT or Copilot?
Yes, if what you have is prompts rather than a process. We build the workflow, the content library, and the qualification logic that sit on top of the AI you already pay for.
Is this a replacement for Loopio, Responsive, Ombud, or SiftHub?
No. It works with them. Where your proposal software supports MCP, we connect your AI directly to it.
How long does setup take?
One to two weeks.
Will it work with our Microsoft 365 and Copilot stack?
Yes. Copilot is one of the four supported platforms, alongside Claude, ChatGPT, and Gemini.
Is it safe to use our proposal content and client data?
It runs in your own AI tenancy, on tiers that don't train on your data by default.
Do we own it afterwards?
Yes. After handover the configuration is yours. There is no lock-in.
How is this different from buying more software or building it ourselves?
Software gives you a tool. Building it yourself costs months. We configure the AI you already have to the way your team actually works, in under two weeks.
Does it work with Claude, ChatGPT, Gemini, and Copilot?
All four.
Can it help with bid qualification and go/no-go decisions?
Yes. The qualifier is built to your thresholds and checked against what separates winning bids from losing ones.
Win Every Proposal Ltd, trading as stargazy. Contact: contact@stargazy.io.