Blog · Sharetribe · 12-min read
What We Learned Building Kidsy on Sharetribe
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First-hand lessons from building our own marketplace, not from documentation, but from experience.
Most Sharetribe experts will tell you they “know” the platform. They’ve built clients’ marketplaces. They’ve customized listing forms. They’ve integrated payment gates.
We did all that too. But we also built our own marketplace on Sharetribe, Kidsy, a marketplace for kids’ gear.
That difference matters.
When you’ve lived through the launch challenges, the scaling headaches, and the late-night debugging sessions for your own product, you stop reading Sharetribe’s documentation and start understanding its DNA.
This is what we learned.
When we started Kidsy in 2021, we had options. We chose Sharetribe for one reason: speed to learn.
We wanted to validate the concept with real users before investing in custom development. Sharetribe let us launch in weeks, not months.
We didn’t overthink the MVP.
The first version of Kidsy had:
That was it. No fancy features. No mobile app. No algorithm.
Within 4 weeks, we had real users listing real items. That taught us more than 6 months of custom development ever would.
Sharetribe’s no-code configuration covers most marketplace needs:
What we thought we’d need to customize: Everything.
What we actually customized: About 20% of the experience.
The lesson? Don’t customize what you haven’t validated.
Once Kidsy had traction, we knew exactly what to customize:
Booking Calendar for Rentals - recurring availability, half-day options, buffer times
Geographic Search - radius-based search, neighborhood filtering, pickup vs shipping
Trust Verification - optional identity verification, social logins, verified parent badges
We built these custom features through Sharetribe’s API. But we only built them after we validated demand.
Sharetribe hosts Go (the no-code version). Flex (the API version) can be self-hosted or Sharetribe-hosted.
We moved to Flex hosted by Sharetribe. The API gave us customization, and Sharetribe handled infrastructure.
This is Marketplace 101, but we learned it ourselves:
Supply-first strategy:
The alternative fails every time. Empty marketplaces stay empty.
Kidsy listings are for babies and kids. Parents need to trust the seller, the item, and the platform.
We added trust features incrementally. Each addition increased conversion. Trust compounds.
What worked: Variable pricing by category.
You’re evaluating Sharetribe experts. Here’s what you should look for:
First-hand experience. Can they tell you what didn’t work? Have they debugged Sharetribe at 2am for their own product?
We’ve been there. Kidsy taught us more about Sharetribe than any client project ever could.
If you’re building a marketplace on Sharetribe, we can help you:
Horizon Labs is a Sharetribe Expert. We were invited to the Expert network in 2023 by the Sharetribe team, based on Kidsy. We’ve built 6 Sharetribe marketplaces for clients. We’re Y Combinator alums (S19) based in Pacific timezone.
Yes. Sharetribe lets you launch a functional marketplace in weeks with listings, search, messaging, and Stripe payments out of the box, which makes it well suited to validating a marketplace idea before investing in custom development.
A focused MVP can launch in a few weeks. We launched the first version of Kidsy (listings, search, Stripe payments, and messaging) in about four weeks before adding any custom features.
After you have validated demand. Once Kidsy had traction we built custom features like a rental booking calendar, geographic search, and trust verification through Sharetribe's developer platform, but only once we knew what users actually needed.
For most marketplaces, Sharetribe is the faster, lower-risk choice: you get a proven foundation and can still customize deeply via the API. Building fully from scratch is rarely worth the extra time and cost early on.
Horizon Labs is a Y Combinator–alum product studio that builds software for founders, faster and more cost-effectively than a traditional agency. Book a free intro call. We'll even scope a small pilot project so you can see the quality of our work before you commit.
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