Accelerate Growth.
We’re an advisory firm focusing on strategy for late-stage startups, VCs, PE-backed companies, and large firms involved in technology.
Capabilities.
Each partner in our firm has developed an expertise in a capability helping organisations, big or small, scale.
- Business Strategy
- Product & Design
- Marketing
- Transformation
- Sales & Go-To-Market
- M&A
- Strategic Futures
- Market Research
Industries.
We have honed a deep experience in specific industries and are obsessed with creating sustainable value, including for Venture Capital and Private Equity.
- Health tech
- Fintech
- Crypto / Web3
- Deep tech
- Digital – App developers
- Consumer Electronics
- Mobility
- Telecom
Meet the Team.
Mangosteen is a community of strategists, innovation experts, and industry veterans who help organizations—big and small—stay ahead now and in the future.
Everyone on our team has worked ‘behind the veil’ at a senior level in large consumer-facing organizations and has the scars to prove it.


What’s our secret sauce ?
We’re fast and practical. And like the Mangosteen fruit, which is low in calories but rich in essential nutrients, we strive to create tremendous value while remaining purposefully lean.
Want to join?
Mangosteen is headquartered in London and we are a team with diverse backgrounds. The businesses we help grow and succeed are from all around the world.

Julien Kervella
Partner

Nathalie Oestmann
Partner

Jean-Daniel Ayme
Partner

Liyan Meng
Business Analyst
Tomas Morais
Business Analyst
AI Growth Strategies for Clients
We help clients harness AI for business growth. Selected examples of our past projects include:
Voice Assistant
AI-Chatbot
Data Privacy and Security
AI in the mobility sector
Exploring the medium- to long-term impact of AI technologies on the mobility sector
How We Leverage AI
Mangosteen partners use generative AI to accelerate delivery and enhance work quality. Throughout our engagements, we continuously optimize system instructions, prompts, and post-processing across various LLM products and model families.
Investments.
We like to put some skin in the game with the companies we work with – specifically early stage tech startups building an ethical and sustainable world.
Explore our 2024 investment.


come talk to us
Send us your pitch deck
Our Advisors.
Meet our trusted advisors — a diverse group of experts who combine deep industry knowledge with strategic insight to guide our clients through every stage of their journey.

Chris Hughes
EPAM Continuum, Leader of
the Experience Consulting &
Design Practice

Herve Mouneyrac
Pharma executive
M&A expert

Rob Magowan
Executive recruiter
Founder of Design Leaders

Max Pog
Serial entrepreneur,
expert in Venture Studios

Keith Lippert
Head of Financial
Crime at Monzo