We Close The Gap Between Ambition and
 Execution

Mentoring and advisory for founders who are serious about scaling — and done with advice that sounds good but doesn't move the needle.

Where are you stuck?

  • Founders

    Something between us has shifted — and I don't know how to name it without blowing everything up.
    • Co-founder dynamics
    • Conflict diagnosis
    • Equity & roles
    • Founder alignment
    Start Here
  • Direction

    I'm not sure we're moving in the right direction.
    • 1:1 mentoring
    • Decision-making
    • Brain trusts
    • Performance diagnostics
    Start Here
  • Growth

    We're stuck. I need to find what's blocking us and remove it.
    • GTM
    • Org design
    • Recruitment
    • Management teams
    • Domain advisory
    Start Here
About

We tell the truth. We keep our egos in check. We bring clarity. And we joke — because it's the best coping strategy we know

We don't measure success by the length of a slide deck. We measure it by what actually changes in your organization. To make that happen, we operate by four principles — and we hold ourselves to them as hard as we hold our founders.

About us
01

Radical Candor

We are honest because we care — not in spite of it. Hard truths, delivered with respect. Always.

02

No Ego

We hold ourselves to the same standard we hold our founders to. We take feedback, we learn, we don't get offended.

03

Clarity

We cut through the noise to give you a clear next step and a decision you can act on immediately.

04

And we joke. A lot.

Because when you're navigating something hard, the ability to laugh about it is not a weakness — it's what keeps you sane. You can relax here. You are among equals.

Results

The Backbone of the Economy

We don't work with corporations. We work with founders of SMEs and high-growth ventures — the people who carry the most risk and operate with the least margin for error. Because of that, we protect their privacy absolutely. What we share here is anonymized by design: problem type, approach, outcome. No names, no industries, no identifiers. Direct references are available upon request.

Problem Type:
Founder Dynamics
Domain:
Co-founder Structure
Industry:
Venture / VC-backed
Problem Description:

A VC-backed startup was scaling through successive funding rounds with unresolved tension between three co-founders. The equity structure and operational roles had never been formally designed — they had simply evolved. The founding team needed to restructure before the cracks became irreversible.

Problem Solution:

We ran individual diagnostics on each founder — mapping personality, life goals, values, and long-term vision separately from their financial interests. Only once that full picture was clear did we facilitate the structural conversation. One co-founder stepped back from operations. The remaining two took on increased management responsibility. The agreement was built on genuine clarity, not forced compromise.

Outcome:
The company is thriving, raising new rounds, and scaling beyond its home market.
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Problem Type:
Founder Dynamics / Execution
Domain:
Leadership Succession, Org Design
Industry:
Venture / Growth-stage
Problem Description:

A founder wanted to step back from operations and transfer the CEO role to their co-founder. An acquisition was in progress. We began preparing the incoming CEO — then the deal fell through. The founder had to return. The organization was left with two founders, no clear authority structure, and a business that couldn't afford to stall.

Problem Solution:

We helped them restructure roles, reporting lines, and decision rights. Over time the co-founder found his footing in sales, grew into the CEO role, and the original founders transitioned to the board. We then worked with the full management team — all first-time managers — on individual development and collective effectiveness. We also mediate board-level friction between the founders when it surfaces.

Outcome:
Four years of continuous month-on-month growth since the product strategy was redefined. The org is stable. The board is functional.
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Problem Type:
Execution
Domain:
Management Team Design
Industry:
Services / Growth-stage
Problem Description:

A founder came to us with a scattered management team. The layer between him and the business wasn't working — roles were unclear, the right people weren't in the right seats, and the founder was absorbing too much operational weight as a result.

Problem Solution:

We helped hire a Head of Delivery and a Head of Sales. The Head of Sales didn't work out — we had advised the founder to lead sales himself from the beginning, but he wanted to test the hire first. He eventually came around. We also coached two junior team members to step into leadership roles and operate with genuine authority rather than remaining in the founder's shadow.

Outcome:
The business is stable, the team is coherent, and the founder leads sales himself — which is where he always had the most impact.
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Testimonials

When you’re growing fast, the problems stop being about customers and start being about people — hiring the wrong ones, promoting the right ones too late, managing a team that’s doubling before you’ve even figured out who you are as a leader. Mangrove has been with us through all of those moments. Not with frameworks or theory, but with real, hands-on support. I honestly don’t know what version of Lettly we’d be running today without them. Probably a worse one.

Jakub Orłowski
Co-founder & CEO, Lettly

Marta has been with us since we were 2 founders arguing over a shared desk. And three junior employees listening to those arguments. Ten years later, we’re 30+ and still calling her first when something important needs thinking through. She’s helped us navigate co-founder conflict, strrengthen and develope our managment team we actually trust, and make strategic calls we wouldn’t have had the clarity to make alone. Mangrove isn’t a consultant you hire. It’s the person who knows your company almost as well as you do (sometimes better than you) and tells you the truth without judgment.

Zuzanna Śleszyńska
Co-founder, Lettly

Entrepreneurship is a great journey, but it can easily get hectic. When it does, even easy situations turn out to be super difficult to solve and founders themselves often feel overwhelmed and lost . This was exactly when I started working with the Mangrove team. They provided me with ready-to-use solutions that quickly lead my company to visible results and, as important as business results, quickly put my mind at ease. If you got stuck in similiar situtation, those are probably your go-to people.

Mateusz Macha
Founder, Humeo

Working with Marta — despite her being genuinely warm — is not a pat on the back. It's research-based, precise, and deeply individual. She's like a surgeon: she analyzes, diagnoses, cuts, and stitches. Except the patient is an active participant in the operation. We came to Mangrove because co-founder collaboration is where many startups quietly fall apart. Marta helped each of us understand our own thinking and working styles, then helped us understand each other's. I learned things about myself and my co-founders I hadn't seen before. It strengthened our relationships, sharpened how we divide responsibility, and made our leadership team genuinely more effective.

Ada Andruszkiewicz
Co-founder, Talkie

I've referred several founders from our portfolio to Mangrove, and the difference it makes is visible. These are people under real pressure, and Mangrove's work helps them think more clearly, lead more effectively, and move faster. As an investor, I can spot gaps that equity and board seats can't fix — Mangrove fills exactly that space.

Przemek Jurgiel-Żyła
Co-Founder, Movens Capital

Tell us where you're stuck. We'll take it from there