4.9 Excellent

Scaling Beauty Brands
Scaling Nutrition Brands
Scaling Clothing Brands
Scaling Skincare Brands
Scaling Dog Brands
Scaling Drink Brands


Apply to the cohort





Founding cohort £795 • April intake • Places capped

Launched already — but growth has stalled?

Hands-on commercial clarity for product founders

1

+

Physical Products Launched (from idea to shelves)

1

+

Years in product & manufacturing (not coaching, not theory)

1

+

Brands Helped (across a diverse range of categories)

1

+

Retailers supplied globally (from independents to big box)

Founding cohort • Places capped

Apply to the cohort Book a 15-min fit check →

Who This Is For:

Founders with a physical product already in market

Solo or small teams (1–3 people)

Already spending (or about to) real money

Founders stuck between too many competing options

People who want honest feedback, not reassurance

Already selling (even if it’s small)

Who This Is Not For:

Are building SaaS or digital products

People who haven’t sold anything yet

Don’t want to hear “not yet”

Are looking for motivation or hype

Want generic, playbooks, or growth hacks

Anyone hoping for a free strategy call

If you’re in the “for” column, here’s what we do.
No fluff. Just commercial judgment applied to your product.

The Foundry is a small, live cohort built around commercial judgment, not tactics, hacks, or playbooks.

By the time founders find this page, they’re not starting out.

They’ve already shipped something.

It’s not effort. It’s uncertainty.

They’re stuck asking things like:

  • Should this product be more expensive or sell more volume?
  • Is this a marketing problem, or a product problem?
  • Is the issue packaging, pricing, channel… or none of the above?
  • Should we double down or stop and rethink?
  • What’s actually blocking growth vs just feels uncomfortable?


Most advice online pushes action.

More ads.
More content.
More channels.


But what most founders need first is clarity:

  • What to fix
  • What to ignore
  • What to stop doing altogether

The hard part isn’t launching.
It’s deciding what matters next and what to stop doing.

Apply to the cohort

Not sure yet - Book a 15-min fit check →

Introducing The Foundry

You don’t need more ideas. You need to know what to do next.

Watch: What’s blocking growth (5 blockers)

I didn’t need motivation. I needed someone to tell me if this was worth scaling.

I walked away with a clear plan and just as importantly, confidence in the decisions I wasn’t making


Laura C
Founder, Accessories & Lifestyle Brand (AU)

I came in thinking I had a marketing problem. Turns out I had a pricing and range problem.

Two sessions in, I’d stopped three things that were draining time and margin, and focused on the one move that actually mattered. I've saved thousands!


Tom H
Founder, DTC Homeware Brand (UK)

What I valued most wasn’t advice, it was judgment.

I finally understood which problems were real, and which ones I was obsessing over because I didn’t know what to prioritise. That clarity changed how I make decisions across the business.


Sarah A

Co-Founder, Skincare & Beauty Brand (EU)

I’ve done courses. I’ve watched the videos. None of them helped me decide what to stop doing.

This did. I left with less noise and more effective ideas. That was the difference.


Alex M

Founder, Pet & Subscription Brand (US)

I was stuck between ‘push harder’ and ‘pull back’.

The Foundry helped me make that call properly with numbers, trade-offs, and consequences laid out clearly. It removed a huge amount of second-guessing.


James W

Founder, Food & Beverage Brand (UK)

What you’ll walk away with

  • A clear diagnosis of what’s actually blocking growth
  • A prioritised plan: what to fix now vs what to ignore
  • Pricing + margin clarity (and what needs to change)
  • Channel direction: D2C vs B2B vs both — and why
  • Packaging + positioning direction (what to say, to who)


Confidence in the next commercial decision

Some founders scale. Some reposition. Some pause.

Either way - you leave with clarity.

Apply to the cohort

Book a 15-min fit check →

Choose your level of support

From a single clarity call to a structured cohort to a one-day deep build.

Clarity Call
(1:1
 - 60 Minute)
Quick diagnosis + next steps.
£300

Best for one specific question.

60 minutes, one blocker

Focused on the decision that’s blocking progress.

Pre-call questionnaire

So we start with context, not small talk.

Clear decision + next moves

You leave with your next 3 moves

Written summary after

A short plan you can actually execute.

Book a clarity call

The Foundry Cohort
(6 weeks - 9 hours live)

Structure, accountability, and multiple chances to course-correct.
£795


Best for building the full plan.
(recommended).

9 hours live sessions

Live sessions + accountability + feedback loops

6-week framework

Weekly outcomes so you always know what “done” looks like.

Hot seats + feedback

Direct input on your product, not generic theory.

Pricing + positioning help

Avoid undercharging or launching with a muddled message.

Frameworks + decision tools

Reusable tools you’ll keep using.

Community + accountability

Faster progress, fewer blind spots.

Apply to the cohort

Fast-Track
(1:1 - Full Day)

Skip the line. One-day deep build.
£2,500


Best when speed matters.

Full-day deep build

One-day working session — fastest route if speed matters.

Pre-work + audits

Reviewed upfront: pricing, positioning, packaging, offer, launch plan.

End-of-day roadmap

Priorities locked. Next steps defined. Timeline agreed.

30-day follow-up call

Keeps momentum and removes the “now what?” drop-off.

Request a Fast-Track day

Brands I’ve worked with

From concept to shelf - across licensing, retail, and founder-led brands.

What Founders Say After Getting Unstuck

“This wasn’t a checklist or a course. It was practical judgment when I needed it most.”

Natasha, Founder, D2C Brand, Spain

“The biggest value was knowing what not to do next.”

John, Founder, Vlothing Brand, New York

"I came in overwhelmed with options. This helped me decide what actually mattered and where to focus first.”

Stephen, Parner, Supplement Brand, London

"Reuben provided much-needed clarity and direction on what I needed to work on to further my online business."

Tania, Founder, Beauty brand, Australia

Who’s Running This?

I’m Reuben, founder of Mustard.

Over 17+ years I’ve launched ~1,000 physical products, built multiple 7-figure brands, and placed ranges with retailers globally. I’ve also made plenty of expensive mistakes - so you don’t have to.

I don’t coach mindset.
I don’t sell motivation.
I help founders make fewer expensive mistakes, earlier.

This call is to confirm fit, not to solve your business.

Meet Reuben →

Not sure if the 6-week cohort is right for you?

Book a short fit check and we’ll work out quickly whether this is right, based on where your product is now and what’s blocking growth.

If it’s not a fit, I’ll tell you. If it is, I’ll tell you exactly what to do next.

See if this is a fit

What happens after you request a fit call

What happens after you request a fit call

1. Pick a time that suits you
2. 15-minute fit check
 — where you are, what you sell, what’s stalled
3. If it’s a match, you’ll be invited to apply for the next cohort

No pressure. No pitching. Just a clear yes/no on fit.