Which Slack groups and founder communities are actually alive — and which rooms exclude vendors?

You will collect invitations to more rooms than you can read, and a room is worth your attention only if you are in it every week. Two rooms are enough. One is where founders at your stage tell the truth about deals and hires. The other is where your buyers talk to each other without you. Everything else is a notification.

A live room looks like this.

You can tell a live room in a day. Questions get answered within hours by people using their real names and companies. The threads are about losses and failed hires, not launches. An admin removes anyone who starts selling. The same fifty people are there all year. A dead room looks like announcements, welcome messages, and a sponsor's webinar, and it costs you the attention you keep giving it in case it wakes up. Leave dead rooms. They do not wake up.

The rooms that refuse you have a reason.

You will be refused by the practitioner and security-leader communities as a matter of rule. They admit people in internal security roles and turn away anyone with a sales, marketing, or investor title, and the promise that no vendors are present is the product they offer their members. You are discussed in those rooms whether or not you are admitted, because that is where a security leader first hears of you and where news of a failed pilot travels within days.

The way in is not an application with a softened title. It is a practitioner or a customer already inside who carries your name in. The way to be discussed well is a product that deploys without incident. Never enter as a founder pretending to be an engineer. The room notices, and the ban follows you to the other rooms.

The founder rooms come in two kinds.

Some rooms are run by funds, for their portfolios and for the founders they hope to back, and some by independents, a founder or an operator hosting the stage they know. Both can be alive. Each has a tilt. A fund's room shows you the fund's network and the founders it backs, and an independent's room shows you what a founder one stage ahead actually did last quarter. Ask a founder one stage ahead which room they would keep if they could keep only one. That answer is worth more than any directory.

Put in more than you take out.

You get out of a room what you put in, on a delay. Ask specific questions with a number in them: how long the security review took, what the pilot was priced at, how many candidates the search saw. Answer more questions than you ask. Never post a link to your product. Write down what you learn in the notes you keep for your own sales and hiring, because a room's answers are the closest thing to a dated benchmark this market has.

How to choose a room for now.

The honest answer to which room is that we have watched founders get real value from more than one and we have not ranked them. Use the test above, and look at who else is in the room before you look at who runs it.

Keep two rooms, show up every week, answer more than you ask, and let the buyers' room talk about you without you.