Greyfeld Partners
We build revenue engines.
Not consultants who advise and leave. Execution partners embedded at the C-suite level — we build it, we run it with you, and we stay until it works. $3B+ in client outcomes delivered. 100% yours to keep.
Two new engagements per quarter — by design, not by accident
Numbers that speak for themselves.
Depth over breadth.
The full weight of our partnership.
What We Do
Six high-impact engagements our clients hire us for — with fees tied to results.
Our fees are tied to your results. We have skin in the game.
Client names are confidential. Their results speak for themselves.
Revenue Architecture
Revenue should be a system, not a series of accidents.
We build repeatable revenue systems from first principles — product-market fit validation, scalable sales processes, unit economics modeling, and growth loop design. Not just pricing, but the entire engine that turns market opportunity into predictable, compounding revenue.
“For the first time, we could explain why we were growing and forecast where we'd be next quarter. That changed everything with our board.”
— CFO, Payments Platform (Series C, Southeast Asia)
Published with client authorization. Identities remain confidential.
Conviction over consensus.
“We deliberately limit our portfolio so every client gets the depth of attention that drives outsized results. We don't compete on scale — we compete on the value we create inside each engagement.”
Skin in the Game
Our economics are tied to yours. A significant portion of our fees is linked to measurable results — so our incentives are fully aligned with your growth. We invest in your success because we build for growth that compounds, not headlines.
Operators, Not Theorists
Every partner has built and scaled companies from zero. Across 47 engagements, we've engineered 47 revenue engines and deployed 63 AI solutions — all designed so clients own and operate them independently. We share what we've scaled, not what we've read.
Build to Transfer
We solve the critical growth problem first, then build the system your team owns and evolves — no vendor lock-in, no dependency on us. We sit in your war room, diagnose the bottleneck, design the fix, write the code, build the model, and leave only when the engine runs without us. You keep everything. We make ourselves unnecessary.
Radical Transparency
We'll tell you what's broken before we tell you what we can fix. No sugarcoating, no filler reports. Just the truth and a plan to act on it.
Expert-Validated, Client-Authorized
We validate our recommendations and implementations with a curated network of senior specialists — world-class operators with 15+ years at the world's leading strategy firms, investment banks, and research institutions. Nothing leaves our hands without expert review, and no external specialist sees your data without your explicit written authorization. Every member of our network is bound by NDA. Your information is safe — always.
Full accountability. Measurable in 90 days. You own everything.
Every engagement comes with a performance component tied to agreed-upon KPIs. We embed at the C-suite level, build the revenue infrastructure, and transfer full ownership to your team.
Advisory Model
Strategic recommendations and frameworks
63 AI systems deployed. 47 revenue engines built. $3B+ in client outcomes delivered. Every system still running.
Book a Fit CallEvery client gets the full partnership. That's the point.
Whether it's embedded consulting, strategic advisory, or a scoped project — every engagement runs through the same partnership model. No junior teams. No delegated oversight. Senior operators, collectively accountable.
The Partnership Model
A lead operator runs your engagement day-to-day — but every strategic decision is reviewed by all partners in the firm. Think of it as a steering committee: your operator brings the full intellectual weight of the partnership to every recommendation. No siloed thinking. No single point of failure. The entire firm is invested in your outcome.
Tied Economics
Our fees have two components: a base retainer that secures our commitment, and a performance component tied to measurable KPIs we agree on together — revenue growth, margin expansion, or operational milestones. Every engagement we take is one we've turned away elsewhere. We don't allocate our best people to outcomes we don't believe in. That conviction is the structure of every engagement since day one.
Systems You Own
Every revenue engine, AI system, and growth playbook we build transfers fully to your team. We document everything, train your people, and leave only when the system runs without us. No vendor lock-in. No recurring dependency. You keep the keys. We make ourselves unnecessary. If you bring us back, it's because you have a new challenge — not because the old one broke.
AI-Amplified Operators
Every partner operates with proprietary AI infrastructure built for revenue operations — from market analysis and financial modeling to competitive intelligence and system architecture. This is why a concentrated team delivers what others need twenty people to attempt. Not artificial intelligence replacing judgment. Senior operators whose judgment is amplified by machines.
The operators behind the work.
Greyfeld Partners was founded by two operators who chose to build a firm where quality of work matters more than quantity of clients. Over a decade together, they've engineered 47 revenue engines, deployed 63 AI solutions, and led teams across 14 countries. They are supported by a curated network of senior domain specialists — world-class operators with 15+ years at the world's leading strategy firms, investment banks, and research institutions — engaged only with explicit client authorization and bound by NDA. Every engagement gets their direct, personal involvement — not a junior team with a partner's name on the cover.
Diego Fischer
Co-Founding & Managing Partner — Strategy & Revenue
Diego doesn't advise from the sidelines — he builds. He took InstaCarro from a whiteboard idea to $105M in revenue in 2.5 years, delivering a 20x return to investors and creating Brazil's largest consumer-to-business car marketplace. When he saw the same playbook could work again, he co-founded Carupi through Y Combinator (W20), raised $11M, and grew revenue 8x. Across both ventures, he led over 500 people and built the revenue engines that now form the foundation of every Greyfeld engagement. His instinct for finding money inside a business was sharpened at Goldman Sachs, Credit Suisse, and McKinsey — and refined at MIT Sloan, where he graduated with a perfect 5.0 GPA and won first place in both the Advanced Analytics competition and the t=0 Startup Hackathon.
“Diego restructured our entire go-to-market in 90 days. Revenue went from flat to 340% growth in two quarters. He didn't just advise — he sat in our war room and rebuilt the engine with us. The financial model he built is still the backbone of every board presentation we give.”
Onil Pereyra
Co-Founding & Managing Partner — Technology & AI
Onil is the engineer who turns strategy into systems that scale. He architected the technology behind InstaCarro — the platform that processed billions in car transactions and became Brazil's #1 consumer-to-business marketplace. Then he founded Curbo, scaling it across 3 countries, $114M in transactions, and 300 people, building the top-performing used car marketplace in northern Latin America. Over 15 years, he's developed an instinct for turning complex technical challenges into revenue-generating platforms — a skill he refined as VP of Operations at Fusemachines, where he led AI deployment at enterprise scale. Today, every AI system and automation Greyfeld deploys carries his architectural fingerprint. MSc in Project Management from Université du Québec.
“Onil deployed an AI system that replaced a 40-person manual review team — not by cutting corners, but by building something genuinely better. Error rates dropped 94%, processing time went from days to seconds, and the system paid for itself in three weeks. I've never seen an engineer think so clearly about business impact.”
Questions from prospective clients
We work with ambitious executives and entrepreneurs building the next great company and established businesses ready to scale. Whether you're doing $1M or $500M in revenue, our sweet spot is companies that know they need to grow but haven't yet built the systems to do it efficiently. We work across four pillars: (1) Strategy & Go-to-Market — pricing, positioning, and revenue architecture; (2) Product & Technology — AI systems, automation, and platform engineering; (3) Operations & Processes — workflows, risk management, and organizational design; and (4) Financial Infrastructure — modeling, fundraising, and capital strategy. Industries include tech, marketplaces, SaaS, fintech, and consumer.
Greyfeld Partners is a strategic management consulting firm that embeds senior operators directly in your leadership team. Every engagement is backed by the full partnership — all partners review strategy and key decisions collectively, like a steering committee. We cover any function your company needs — from revenue and operations to technology, finance, and go-to-market — and we tie our fees to measurable results. We implement everything we recommend.
It starts with a 30-minute Fit Assessment with our Managing Partner. If there is mutual alignment, we propose a 3-month engagement with clear deliverables and KPIs. Most clients extend beyond the initial period. Our team works 2–3 days per week alongside yours, attends leadership meetings, and has direct access to founders and CEO. Senior operators embedded in your company — building, implementing, and transferring ownership.
Our clients typically see measurable revenue acceleration, margin expansion, and faster time-to-market within the first 90 days. We find the money that's already in your business and build the systems to capture it — systems your team owns and operates independently. Whether that means restructuring pricing, deploying AI automation, launching new revenue channels, or redesigning go-to-market — we build it, hand you the keys, and the problem stays solved. Our managing partners co-founded and scaled InstaCarro from zero to $105M in 2.5 years, delivering a 20x return to investors. Across 47 engagements in 14 countries, we've impacted over $3B in client revenue. Due to confidentiality agreements, we do not disclose client names publicly. Selected case studies and detailed results frameworks are reviewed during the Fit Assessment.
Our engagements deliver strategy, execution, and a working system you own — with a significant portion of fees tied to measurable outcomes. Across 47 engagements, our average client ROI exceeds 9x the total investment within 12 months. We price for the value we create, not the hours we bill. The specific structure is discussed during the Fit Assessment.
Because diluting attention dilutes results. Our model is deliberate: fewer clients, senior-led execution, and deeper impact per engagement. Every partner is directly involved in delivery — not overseeing from a distance. Our fees are tied to outcomes, so depth is how we create value. When we go deeper, we deliver more.
All engagements are protected by non-disclosure agreements. We do not share client names publicly — this is a deliberate choice. Our clients trust us with sensitive strategic and financial information, and that trust is non-negotiable. Selected case studies, specific methodologies, and our results framework are reviewed during the Fit Assessment.
No — but we don't disappear either. We build systems your team owns and operates independently. Every deliverable is designed to run without us. We transfer knowledge, document everything, and train your team. But here's what makes us different: we follow up after the engagement ends. We check in at 30, 60, and 90 days to make sure the system is performing, your team is confident, and nothing has drifted. Too many firms hand over a deck and vanish. We hold your hand through the finish line — and then come back to make sure you're still running.
The insights we share with our clients.
Now in your inbox.Every week, we send one piece of intelligence to a small group of operators and executives. Revenue strategies, AI implementation playbooks, market signals — the same material we use with our $100M+ clients.
Join 700+ operators who read us every Thursday.
Built for intensity.
An elite team of senior operators who move fast, think deeply, and take personal ownership of outcomes. This is how we operate — and why our clients trust us with their most critical growth challenges.
Ownership Over Titles
Nobody hides behind a role. Every team member owns a problem end-to-end — from diagnosis through execution to measurable result. If it needs fixing, you fix it. If it needs building, you build it.
Speed as a Discipline
We ship in days, not quarters. Our clients hire us because they cannot afford to wait — and neither can we. Bias toward action, iterate in the open, and never confuse motion with progress.
Intellectual Honesty
We say what we see, even when it is uncomfortable. The best ideas win regardless of who proposed them. We challenge each other because our clients deserve our sharpest work, not our most diplomatic.
Compounding Knowledge
Every engagement makes us sharper. We systematize what we learn — frameworks, playbooks, benchmarks — so each new client benefits from the accumulated intelligence of every project before them.
Remote-First, Results-Only
We work from wherever we think best — across continents, time zones, and quiet cafés. No office politics, no performative presence. The only metric is the quality of the work and the impact it creates.
Generosity of Spirit
We teach everything we know. To clients, to each other, to the broader community. Hoarding knowledge is a sign of insecurity. Sharing it is how we build trust — and how we attract the kind of people who make Greyfeld exceptional.
Build what matters.
Greyfeld Partners is always looking for exceptional operators, strategists, and technologists who want to work on the hardest growth problems in business. We hire senior professionals who combine analytical rigor with execution speed — people who've built, scaled, or turned around real companies.
Open Positions
Know someone who needs a revenue engine?
Refer a company to Greyfeld Partners and earn $25,000 for every signed engagement — paid at conclusion. No cap on referrals. A meaningful acknowledgment for connecting us with exceptional companies.
$25,000 per signed engagement
Not every company qualifies.
We take two new clients per quarter. Each engagement is a significant commitment of our senior partners' time and attention. This call determines whether there's a genuine strategic fit — for both sides.
Our calendar shows live availability. Pick a time that works for you.