Build a Marketplace People Love.

I help early-stage marketplace founders and teams avoid the expensive mistakes, accelerate growth, and scale with confidence. After 17 years and four marketplaces, including leading Getmyboat from inception to the world’s largest boating marketplace, I bring practical, lived experience across every major function, from product and operations to marketing and capital strategy.

Not theory. Not generic advice. Real tactics that actually moves the needle on GMV, revenue, and team performance.

Let’s Build Together

Helping Marketplaces Succeed

If it happens in a marketplace, I’ve probably seen it, fixed it, or built around it. Here are some of the ways I can help.

  • A vector illustration of a rocket launching surrounded by icons including a magnifying glass over a bar chart, a globe, a gear, a smartphone with a bar chart, an envelope with a document, a megaphone, and a refresh symbol.

    Marketing & Growth

    SEO, SEM, organic acquisition, performance, partnerships, and marketplace-specific growth loops.

  • Illustration of financial growth, including a large upward arrow, coins, dollar signs, a piggy bank, a calculator, a magnifying glass, a credit card, and charts, representing increasing profits and investment.

    Finance & Capital Management

    Your marketplace becomes far easier to run once the unit economics, margins, and financial plan are clear and built for healthy growth.

  • Illustration of two people working at a desk with a computer, surrounded by icons of chat bubbles, a heart, stars, a cloud, a phone, and a potted plant, in pink, black, and white colors.

    Customer Service

    Great support protects both sides of your marketplace and builds the trust that keeps people coming back.

  • Illustration of a mobile phone with a shopping cart icon and magnifying glass, surrounded by gears, a box with a heart, and a wrench, representing mobile e-commerce and app development.

    Product Design

    A well-designed marketplace removes friction at every step, making it easy for users to search, buy, and return.

  • Illustration of four people on video calls on a computer monitor, with symbols for Wi-Fi, email, messaging, and time, representing online communication and remote connectivity.

    Company Culture

    Building the right culture helps marketplace teams move fast and stay aligned through every stage of growth.

  • Startup Advisory & Coaching

    Advisory & Coaching

    Founder-to-founder guidance on hiring, leadership, decision-making, and navigating the ups and downs of building a two-sided marketplace.

  • Illustration of three people around an upward trending arrow, with financial icons like a dollar sign, a bar chart, a smartphone displaying a chart, a briefcase, an envelope, and a megaphone.

    Supply-Side Sales

    Support across supply growth, onboarding, supply quality, service ops, fraud, and organic growth levers.

  • Illustration of a computer monitor displaying data charts, with a brain above connected to the monitor, representing artificial intelligence or machine learning, surrounded by data-related icons.

    Engineering & AI

    Smart engineering and practical AI integration help your marketplace scale smoothly without unnecessary complexity.

Meet the Founder

I’m Bryan Petro, the founder of Marketplace Collective and have spent my career building and growing marketplaces from the ground up. I’ve seen the full journey, from the early chaos, the common growing pains, and the real upside that comes when a marketplace hits its stride. Whether you’re bootstrapping or preparing for an exit, I can help you fill the gaps and move faster.


If you’re building something and want support from someone who’s been through it, let’s talk.

A smiling man in business attire standing in a modern office building with large windows in the background.

I love talking marketplaces.

If you’re building one, thinking about one, or stuck somewhere in the middle, reach out. Whether you’re looking for help or just want to bounce ideas around, I’m always happy to connect.

Share a few details below and I’ll get back to you soon.

The Flywheel

The Marketplace Collective blog. This is where we break down real frameworks, share practical guidance, and explore how great marketplaces are built. View all articles

Featured
How to Calculate TAM for Marketplaces
How to Calculate TAM for Marketplaces

TAM is one of the most misunderstood metrics in marketplace businesses. This guide breaks down how to calculate TAM based on GMV, take rate, and local market sizing so founders can build a clear and credible growth strategy.

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How Poor Photos Destroy Marketplace Trust and Conversion
How Poor Photos Destroy Marketplace Trust and Conversion

Supply photos shape the entire marketplace experience. Clean, high-quality images build trust, improve conversion, boost SEO, and reduce off-platform leakage. This guide breaks down the standards every founder needs to enforce early so your marketplace scales with confidence.

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How to Define Your “Right” Supply: Volume, Quality, and Diversity That Drives Demand
How to Define Your “Right” Supply: Volume, Quality, and Diversity That Drives Demand

This guide breaks down what high-performing supply actually looks like, why it matters, and how volume, quality, diversity, engagement, and density work together to shape the strength of your marketplace.

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The Different Types of Marketplaces and How They Grow
The Different Types of Marketplaces and How They Grow

Marketplaces may look similar, but they grow in very different ways. This guide breaks down the major marketplace types and explains how horizontal, vertical, B2B, B2C, product, service, high frequency, and low frequency models find liquidity, build trust, and scale. Understanding your model early helps you choose the right growth strategy.

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