New continuous cohort · registrations open

Build in public with other Rails.Builders

A focused group for engineers who build on Rails for their own business. Weekly sessions, momentum, honest feedback, gamification, and fellow devs who notice when you ship. AI-pilled.

Claim your place See how it works

Email-only sign in · 1 place left 🔥

Current cohort

Continuous r-AI-ls.Builders Edition

One continuous group, with a shared finish line and new Builders joining when a place opens.

03 Sep — 17 Dec 2026

until current cohort ends

On the calendar

Build together, on purpose.

Thu 10 Sep · 17:30 CEST

🛠️ Day topic: Your Funnel & "Sales Engineers"

Facilitated by Rich Steinmetz

60-minute core session

Thu 17 Sep · 17:30 CEST

🛠️ Your Offer

Facilitated by Rich Steinmetz

60-minute core session

Thu 24 Sep · 17:30 CEST

🛠️ Your Focus Metric 🎯

Facilitated by Rich Steinmetz

60-minute core session

Currently facilitating

Rich Steinmetz

Working on Loop Labs 🧪. Keeping the room moving, the ass-kicking candid, and the red thread visible.

Not another sprawling community platform

How to join

Bring one product to focus on. Build alongside fellow devs.

Crack open the build pathSee all four steps

Join with your email

OG builders get first access to the 9 seats. Everyone else keeps a place on the waitlist.

Choose the thing you’ll ship

Add as many products as you like (hopefully ONE 😉).

Build with company

Weekly live sessions where builders share what’s working, learn from each other, and keep shipping.

Keep the context

Session history, Slack chat and transcripts keep each conversation available and the learning crisp for useful next moves.

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Not another feed to scroll.

Group principles

Open the Builders’ codeFive things we protect

Live contact preferred

The meat of being an active Rails Builder is the live sessions—this is where most of the action happens. The rest of the time, we want you to focus on building.

Small by design

9 active seats keep the room useful, familiar, and accountable.

Your product stays yours

Keep your profile private, or publish your work on rails.builders when you’re ready.

Registration never closes

Join the queue anytime. When a seat opens, you get 72 hours to make it yours.

Private Slack channel

Not the central piece, but it’s there when you want to connect with Rich, ask the group a question, or ask Otto Labot—our robotic Lab Bot—anything about previous sessions or changes to the rails.builders app.

Proven session format in a gamified cohort.

How the Continuous r-AI-ls.Builders Edition works

Press the ruby and follow the train.

🚂 Forever free & community-led
💪 Weekly live sessions. OBLIGATORY: Missing 3 sessions in a row opens a spot for the waitlist ⚾☠️
🎯 ~1 hour: everyone takes a turn in random order to share one business challenge, one AI-building thing, and one thing they want to achieve by the next session
🛋️ (optional) ~30m just for a fun hangout to go deeper on anything or talk current events
⛑️ Learn from others during the sessions & execute until the next one. Get support or your ass kicked — whatever you need most right now
💌 (optional) Personalized session summary email
📈 (optional) Monthly trend analysis email of your Builder journey
💬 (optional) Get support or message other Builders in Slack, including Prof. Otto Labot, who knows everything about the Rails.Builders, their past sessions and can ship code for the app you are looking at
📚 (WIP, probably optional) Maybe a book club, $100M Offers by Hormozi

A quick reality check before you board

Am I ready to join?

If the direction feels right, but you are missing some of these, you still have time to get them in until the start of the sessions, just get your spot then!

You have the ONE product you would hack on with us.
You have a concrete offer you can put into one sentence for that product.
You use AI heavily to build it and are excited to share how you do it.
You use Rails to support your product in one way or another.
You have a funnel for that product.
You have a checkout (so it's purchaseable).

If you are missing any of that, give Rich a ping and he’ll be happy to set you up.

The people behind the commits

Meet the Rails Builders.

Profiles appear only when a builder chooses to publish and a facilitator approves. The gleaming rubies are OGs who haven’t stepped into the spotlight yet.

Active Builders

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8 building now

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OG · profile private

FullStack Donald Hinton

Waiting for their reveal.

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OG · profile private

Bitwise Matz Brooks

Waiting for their reveal.

Bilal B

Flowboardpro

“I'm a full stack ruby on rails engineer crafting software products to solve problems.”

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OG · profile private

Functional Arvind Hoffman

Waiting for their reveal.

Zack Gilbert

Eventually Ticketing

“Big fan of having a group of like minded builders helping each other learn and grow together. Super grateful that Rich has put this together.”

Rich Steinmetz

Loop Labs 🧪

“It was fun seeing everyone's movement and progress during different cohorts.”

Florian

Rawshot.ai

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OG · profile private

KernelLevel Sheryl VanRossum

Waiting for their reveal.

Waitlisted Builders

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Signed up, non-OG - opening up soon

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Waitlisted Builder · profile private

Scalable Rasmus LeCun

Waiting for their reveal.

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Waitlisted Builder · profile private

ShipShape Mitchell BernersLee

Waiting for their reveal.

Still prepping for the Build

🛠️

Signed up, but not yet ready to commit to the Build

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Still prepping for the Build · profile private

ObjectOriented Sara BernersLee

Waiting for their reveal.

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Still prepping for the Build · profile private

Compiling Sam Hinton

Waiting for their reveal.

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Still prepping for the Build · profile private

42ish Tim Zuckerberg

Waiting for their reveal.

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Still prepping for the Build · profile private

Serverless Frances McCarthy

Waiting for their reveal.

Bruno Bornsztein

TaskYou

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Still prepping for the Build · profile private

Composable Yukihiro Atwood

Waiting for their reveal.

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Still prepping for the Build · profile private

Dockerized Jessica Su

Waiting for their reveal.

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Still prepping for the Build · profile private

PixelPerfect Donald Ingalls

Waiting for their reveal.

The OGs

One email gets you started. We’ll tell you exactly where you stand.

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