**This is a one-off cross-promotional episode of our new podcast: Sharetribe Founder Stories.**
This new podcast features interviews with founders building successful online marketplaces with Sharetribe. Discover how founders identified opportunities, overcame challenges, and scaled their platforms—from their first transaction to millions in GMV. Each episode dives into both the strategies that worked and the mistakes that taught valuable lessons.

In this first episode, you can hear the story of Marcel Fairbairn and Gearsource.

GearSource is a marketplace that helps rental companies sell professional audio and event production equipment they no longer need. Marcel Fairbairn built the company in 2002, which makes GearSource one of the oldest online marketplaces still in operation, alongside giants like eBay and Amazon.

What you'll learn:

• How a self-funded founder built one of the oldest surviving marketplaces on the internet
• How Marcel identified an “invisible inventory problem” that became an idea for a marketplace business
• The critical "aha moment" when Marcel realized his 16-year-old business was actually a marketplace, and how that changed everything in Marcel's approach
• Why lowering commission rates accelerated growth and scalability
• The painful lessons from three platform migrations before finding stability with Sharetribe
• How to transition from a high-touch service model to an automated marketplace
• Marcel's unconventional strategy: "Be aggressive on growing revenue, conservative on growing expenses

In this solo episode, Sjoerd wraps up Season 3 of Two-Sided, summarizing key lessons from eight insightful conversations with leading marketplace investors. He highlights essential themes like leveraging network effects for defensibility, the power of starting small before scaling, succeeding in B2B marketplaces, and how AI is reshaping the future. A concise yet rich recap—don’t miss it!

In this episode, we dive into the world of marketplaces with Pete Flint, co-founder of NFX, one of the leading venture firms specializing in network effects. Pete brings decades of marketplace experience, from the founding team at Lastminute.com to the creation of Trulia and its merger with Zillow. At NFX, Pete and his team have a unique perspective on how network effects drive defensibility in marketplace businesses.

Here are three highlights from the conversation:

• The Key to Defensibility: Pete explains why network effects are the best form of defensibility for marketplace businesses and how they make companies resilient over time.
• AI's Role in Marketplaces: Pete discusses how AI is both disrupting and enabling marketplaces, and why it’s creating entirely new marketplace models.
• The Best Advice for Marketplace Founders: Pete shares his top tips for aspiring founders, from identifying the hardest side of the marketplace to seizing opportunities during economic or regulatory change.

Tune in to hear Pete’s insights on building long-lasting, resilient marketplace businesses powered by network effects.

In this episode, we dive into the world of B2B marketplace investments with Laurens Groenendrijk and Bas Rieter from DFF Ventures. With years of experience as founders and investors, Bas and Laurens (as co-founder of JustEat and Treatwell) share valuable insights into building and scaling marketplaces that disrupt traditional industries. Tune in for:

• The rise of re-commerce and the role of technology in creating trust and transparency within B2B marketplaces.
• Why focusing on niche markets can be the key to achieving fast growth in B2B spaces.
• A shift in monetization strategies: How B2B marketplaces are moving beyond traditional transaction fees

Listen to hear how DFF Ventures is backing innovative B2B marketplaces and how aspiring founders can capture market share in under-digitized industries.

In this episode, we’re joined by Colin Gardiner, a seasoned operator and investor in the marketplace space. From his experience scaling Outdoorsy to leading early-stage investments, Colin dives into the critical elements that make marketplaces succeed and thrive.

Highlights:

• Why unique supply is key: Colin explains how aggregating truly unique supply drives the success of a marketplace.
• The importance of a strong distribution strategy: A strong go-to-market plan can be the deciding factor in whether a marketplace reaches scale.
• AI-driven agent-led marketplaces: The future of marketplaces may lie in AI and automation to scale operations and improve the user experience.

Did this make you curious? Then don’t wait and tune in to this episode!

In this episode of Two-Sided, we explore how early-stage marketplace investors like Jeroen Arts at Speedinvest evaluate and support marketplace founders. Jeroen brings years of experience in identifying scalable marketplace models, high-potential founders and shares his approach to spotting opportunities and avoiding common mistakes for early stage founders.

Highlights include:

• The power of speed in decision-making: Jeroen discusses the critical importance of “clock speed” in founders—how quickly they make decisions and adapt to change in the early days.
• Why market focus trumps premature internationalization: Learn why trying to scale too quickly into multiple regions can backfire for many early-stage marketplace founders.
• Trends driving marketplace innovation: Jeroen shares his excitement about emerging opportunities, especially in industries like health and Gen Z-driven consumer behaviors.

Enjoy this episode!

In this episode, we are joined by Mira Mihaylova from Piton Capital. Since its inception in 2010, Piton Capital has focused solely on network effects businesses, having invested in over 100 businesses, all with network effects, and the vast majority of them are marketplaces.
Some of the things we’ll talk about:

• Frontal vs lateral attack strategy: Mira highlights the challenges of launching a marketplace that directly competes with an established player (frontal attack), advising founders to instead focus on a smaller adjacent market to gain traction and gradually expand into the larger market (lateral attack).
• The importance of starting in a small, adjacent market: Mira explains how focusing on a niche can lead to faster product-market fit and eventual scalability.
• Why liquidity is the core of any marketplace: She stresses the importance of building liquidity before worrying about advanced tech or scaling.
• The role of AI in disrupting marketplaces: Mira discusses how AI can optimize marketplace operations and help founders stay ahead of competition.

After this episode, you’ll again have a slightly deeper understanding of what makes marketplaces succeed!

In this episode, Andrew Blachman, co-founder of Marketplace Capital, shares his wealth of experience in building and investing in online marketplaces. As an operator turned investor, he reveals valuable insights for aspiring marketplace founders.Highlights:

• The importance of creating new market opportunities: Andrew explains how successful marketplaces unlock new supply or demand that didn’t exist before, like Airbnb did for short-term rentals.
• Why building traction before raising capital is key: He shares advice on how to validate your marketplace idea and gain traction without relying on funding too early.
• The impact of AI on the future of marketplaces: Andrew discusses how AI can enhance marketplace experiences, making connections more efficient and improving customer satisfaction.

In this episode, we'll talk to Sameer Singh, an angel investor known for his excellent blog on network effects, Breadcrumb.vc, former Atomico Angel, and current venture partner at SpeedInvest.

We’ll discuss how Sameer evaluates marketplace businesses:

• Evaluating Network Effects: Sameer walks through his four-step evaluation process for marketplace investments, focusing on unique multiplayer interactions and defensibility.
• Challenges in Early-Stage Marketplaces: He discusses common mistakes made by aspiring marketplace founders, such as picking overly narrow markets or trying to tackle too many problems at once.
• Future Trends in Marketplaces: Sameer emphasizes the lasting power of network effects and we explore some opportunities driven by behavioral shifts, especially with Gen Z and AI technology.

A terrific episode, packed with valuable tips and sights. If you're building a marketplace or network effects business, you’re going to love this.

After a brief hiatus, Two-sided—the marketplace podcast is back! 

I’m super excited to kick off season three of the podcast with a chat with Jose Marin of FJ Labs. 

FJ Labs is considered the world’s most prolific angel investor: they have over 1,100 startups in their portfolio, including heavy hitters like Airbnb, Alibaba, and AngelList (and that’s just the ones beginning with the letter A). Jose has also been a marketplace founder himself. His marketplace DeRemate (eBay model for Latin America) was acquired by Mercado Libre, which today is a NASDAQ-listed company. 

In this episode, Jose and I discuss:

• How FJ Labs has built its unique investment approach using their vast vertical expertise.
• The emerging trends in marketplaces FJ Labs are seeing in their portfolio, such as B2B digitalization and cross-border commerce.
• Some important things that early-stage marketplace founders should look out for.

I couldn’t have asked for a better opener, so dive right in!