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5* Google review

Boutique Fractional CFO Company

Startups don’t run out of ideas—they run out of cash.

The Lean Finance offers a proven framework to spot issues early, set priorities, and make value-driven decisions—turning vision into traction.

Our Clients’ Success Is Our Biggest Reward

Anton made sure he understood my business to create a bespoke financial model. Communication was prompt regarding any updates. Smooth engagement overall.

Dillon Meier

Dr. Dillon Meier, CEO

7Longevity

I’m a physician at Stanford University who is starting a biotech company. I feel extremely fortunate to have met Anton. With his background in biology in addition to his extensive business experience, he immediately understood the product I'm developing, exactly how it works, and the optimal business strategy for it.

He went above and beyond at every step of the way. Not only did he skillfully write a beautiful and well thought out business plan, but he also created a thorough and detailed financial model for the company. He had clearly put in the time and effort to research every aspect of the plan, and the final product is one I can confidently share with investors.

Although my background in business is limited, Anton's clear communication of concepts allowed me to come away from our discussions with a strong understanding of how the business plan and financial model were formulated as well as what investors are looking for in a startup. Thus, beyond the skillfully crafted deliverable, working with Anton was also an excellent educational experience for me.

In addition to his great work ethic, Anton is very personable and friendly. I enjoyed our discussions and felt very comfortable asking him questions. I highly recommend him and look forward to working with him again on the next milestones for my startup.

Ophir Vermesh

Dr. Ophir Vermesh, CEO

Magwire

Far exceeded my expectations. Recommend 100%

Jason Clarke

Jason Clarke, CEO

Society Artisanal

Anton did an amazing job with our internal modeling for our cyber firm! Extremely responsive to our tight deadlines and gettting the job done with incredible detail and professionalism. Looking forward to working with Anton again in the future.

Rob Vazquez

Herbert Vazquez, CEO

Beacon Technology

Anton is an exceptional financial modeler with deep expertise in SaaS. He developed a highly detailed and insightful 5-year financial model for our Series A funding round, exceeding our expectations in every way. His strategic thinking, accuracy, and ability to translate complex financial data into actionable insights are truly impressive.

Beyond just delivering the model, Anton went above and beyond—offering valuable recommendations, refining key assumptions, and ensuring every metric aligned perfectly with investor expectations. If you’re looking for a top-tier financial modeling expert who understands SaaS inside out, Anton is the one. Highly recommended!

Oliver Schmalholz

Oliver Schmalholz, Co-Founder

Listkit

With financial modelling not being my strong point i was extremely grateful to find Anton to help build the model out to exactly what was required, His hands on approach, execution and communication was 5* i'll be recommending his services and using Anton again no doubt post raise, Thanks again.

Andy Waldron

Andy Waldron, CEO

Designsnitch

Anton is a highly competent, motivated and flexible business consultant. He has helped us flesh out our biotech startup business case with market analysis and financial projections in Excel, which has ultimately significantly contributed to us raising our pre-seed round. If you're seeking investment and need support on the financial aspect of your start-up, I cannot recommend Anton highly enough!

Christina Port

Dr. Christina Port, CEO

2NA FISH

Anton has exceeded all our expectations. He really took the time to understand our business and provided invaluable feedback. I wish all my upwork engagements are as pleasant and value adding as this has been. Absolute pleasure to work with him and hopefully will work with him again in the future. Cant recommend him enough

Hani Salem

Hani Salem, COO

Classtap

I had the pleasure of having Anton cooperating with some of our projects, and I cannot recommend him highly enough. His expertise in financial modeling is exceptional, allowing us to develop precise forecasts that drove strategic decision-making.

Anton’s analytical thinking is highly effective, especially in the context of business development for startups and new projects. He has a remarkable ability to dissect complex data and present it in a clear and actionable manner. His focus on key performance indicators (KPIs) and main metrics are of great value to allow any team stay to stay aligned and goal-oriented.

What truly stands out is Anton’s intuitive understanding of business development. He effortlessly crafts methodological approaches that are both comprehensive and practical, making him an invaluable asset in fast-paced environments. His insights have propelled our initiatives forward, and his collaborative spirit fosters a positive team atmosphere.

If you’re looking for someone who combines technical expertise with strategic vision, Anton is your go-to person!

Paulo Rendeiro

Paulo Rendeiro, CFO

IGHS

Anton is smart, intelligent, competent and creative. He goes above and beyond. I give him my warmest recommendations and look forward to working with him again.

Valdemar Siesbye

Valdemar E. A. Siesbye, CEO

Hyper Patch

Anton is the "real deal"! He did an outstanding job for me! He exceeded my expectations! He is really very smart and talented and he was able to get all the nuances I of my startup and simplified them on the sheet. I was also very impressed with his kindness willingness to do so many add-on's and revisions!

Shia Grunzweig

Shia Grunzweig, CEO

Zevoo

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