CTOsOnly

Members only · No vendors · Verified seats

For people who
read the logs.

This is not a networking group. It is a closed room for the people who make the bets that take three years to prove — and are still there when the bill arrives.

Applications are reviewed by a person. Most are declined. That is the point.

In the room

  • Sitting CTOs, CIOs and VPs of Engineering
  • Chief architects and heads of platform carrying real accountability
  • Technical leaders who own the roadmap, the headcount and the outage
  • People whose decision is named in the postmortem

Not in the room

  • Vendors, resellers, developer-tool sales — at any seniority
  • Recruiters and search firms
  • Press, analysts, researchers looking for quotes
  • Consultants and fractional CTOs selling services
  • Investors and founders "exploring the space"

There is no tier, no upgrade, no sponsor package that changes this list. Several people will be annoyed by it. They are welcome to be annoyed somewhere else.

Why a closed room

You are asked to commit to an architecture years before anyone can tell you whether it was the right one, and then to defend it every quarter to people measuring a different thing. The bets are long, the judgement is short, and the cost of being wrong is paid by a team that had no say in it.

Meanwhile every forum that claims to serve you is paid for by someone selling to you. The dinner is sponsored. The "technical advisory board" is a pipeline. The community is a developer-relations budget with a Slack workspace.

You cannot be honest about your architecture in a room where somebody is selling the replacement.

So: no one is selling anything here, and nothing said here leaves.

What it is actually for

The 2am call

Production is down, the vendor's status page is green, and you need someone who has seen this exact failure mode before. Not a support tier. A person, tonight.

Build or buy, honestly

What that platform actually cost once it was in production — the migration, the year of headcount it ate, the people who left over it — and whether they would do it again.

Numbers that are real

Engineering compensation, levelling, span of control, what a staff engineer costs in your market. From peers who will tell you the truth, not from a survey underwritten by a vendor.

The board deck, before the board

Take the technical-debt slide, or the one with the AI spend on it, to people who have defended that number to a sceptical board and know which line gets you cornered.

The thing you can't say publicly

That the rewrite is behind. That the acquisition came with a codebase nobody has read. That you are being told to ship something you do not believe is ready.

An exit route

Roles move through peers long before they reach a search firm. No recruiters in the room means the conversation stays between people who are actually hiring and actually leaving.

The charter

Six rules. They are short because they are not negotiable, and numbered because you agree to them in order when you join.

  1. Nothing leaves the room

    Chatham House by default, and stricter in practice: no screenshots, no forwarding, no "a friend told me". Attribution outside the room is the one thing that ends a membership immediately.

  2. Nobody sells

    No pitches, no demos, no "happy to intro you to my friend at". This includes the polite version, the helpful version, and the version disguised as a recommendation.

  3. Verified seat, or no seat

    Every member is a named, verified human holding a real technical leadership role. No anonymous accounts, no shared logins, no delegates attending on someone's behalf.

  4. Your seat is yours, not your employer's

    Membership follows you when you move. It is not a corporate subscription, it cannot be transferred to your successor, and your company does not get a login because it paid.

  5. Contribute or lapse

    A room of readers is worthless. Members who take for a year and give nothing are asked to leave, without hard feelings — the value here is other people answering, so answering is the subscription.

  6. One strike on trust

    Ordinary disagreement is fine and encouraged. Breaching confidence, selling under cover, or misrepresenting your role is a single removal with no appeal.

How vetting works

Three steps, done by a person. Expect it to take days rather than minutes.

  1. 01

    You apply

    The form below. Work email, real name, actual title. Two minutes if you are eligible, and awkward if you are not.

  2. 02

    We verify the seat

    Your role is confirmed independently — public record, your work domain, and where it is not obvious, a short call or a word from an existing member. We are checking the seat, not auditing you.

  3. 03

    You are invited, or you are not

    A decision either way, in writing. A decline is usually about fit or verification, rarely about you, and never explained at length — which is itself a courtesy.

Apply

Everything here is used to assess your application and nothing else. No marketing list, no data sale, no third parties.

Must be your organisation's domain. Personal addresses are declined automatically.

Optional, but it speeds verification up considerably.

A few sentences. What you are deep in right now, or what you would want to ask on day one. This is the part that is actually read.

Trouble with the form? Write to apply@ctosonly.com with the same details.

Questions people actually ask

I'm the CTO of a developer-tools company. Am I out?

No. The bar is selling, not your employer's product line. You hold the same seat and the same accountability as everyone else in the room. If you use the room to generate pipeline, you are removed under rule two — the same as anyone.

I'm a fractional CTO or a consultant.

Case by case, and the question is where the accountability sits. If you hold the technical accountability for an organisation under a long-term engagement, apply and say so plainly. If your revenue comes from selling advisory or delivery services, this is not the room for you.

Is this only for large companies?

No, but it is for people carrying the weight. A CTO at forty people with the whole platform on their name belongs here more than a titular CTO at a thousand who signs nothing. We are checking accountability, not headcount.

What does it cost?

Membership terms are set out in the invitation, before you are asked to commit to anything. Nobody is charged to apply, and there is no sponsor money — which means members fund it, which is exactly why nobody sells here.

Is it anonymous?

The opposite. Every member is verified and named to the others — candour depends on knowing who is in the room. Confidentiality applies outward, not inward.

What happens to what I put in this form?

It is stored to assess your application and nothing else. It is not sold, not shared, and not fed to a marketing platform. This site sets no cookies, loads no third-party fonts or scripts, and runs no analytics — you can check that in your network tab, and you probably will.