Best Boilerplates for Marketplace Apps in 2026

Marketplaces Are Harder Than Standard SaaS

Standard SaaS has one billing direction: user → you. Marketplaces have two: buyer → you → seller. This requires Stripe Connect (or similar), which changes the entire billing architecture.

No boilerplate ships fully-configured Stripe Connect out of the box — it's a custom configuration. But the right boilerplate foundation dramatically reduces the work.

What Marketplace Boilerplates Need

Beyond standard SaaS features, marketplace apps require:

1. Stripe Connect — Onboard sellers, route payments, take platform fees
2. Seller profiles — Public profiles, listings, verification badges
3. Review system — Buyer reviews of sellers, seller reviews of buyers
4. Messaging — Buyer ↔ seller communication
5. Dispute resolution — Handle payment disputes and refunds
6. Platform fee — Take % of each transaction

Stripe Connect: The Core Architecture

Standard vs Custom Connect

Account Type	Seller Experience	Your Dashboard	Best For
Standard	Full Stripe dashboard	Limited visibility	Simple marketplaces
Express	Streamlined onboarding	Full visibility	Most marketplaces
Custom	Fully branded	Complete control	Large-scale, branded

Express Connect is the right choice for 95% of new marketplaces.

// Onboard a new seller
const accountLink = await stripe.accountLinks.create({
  account: seller.stripeAccountId,
  refresh_url: `${BASE_URL}/sellers/onboard?refresh=true`,
  return_url: `${BASE_URL}/sellers/dashboard`,
  type: 'account_onboarding',
});

// Redirect seller to Stripe onboarding
redirect(accountLink.url);

// Process payment with platform fee
const paymentIntent = await stripe.paymentIntents.create({
  amount: 10000,  // $100.00
  currency: 'usd',
  application_fee_amount: 1000,  // $10.00 platform fee (10%)
  transfer_data: {
    destination: seller.stripeAccountId,
  },
});

Best Foundation Starters for Marketplaces

Supastarter — Best Multi-Tenant Foundation

Supastarter's multi-tenant architecture maps cleanly to marketplace sellers. Each "organization" becomes a seller account. Add Stripe Connect on top.

Customization needed:

• Replace organization billing with Stripe Connect seller onboarding
• Add listing models to the existing database schema
• Build buyer payment flow with application_fee_amount
• Add review system (2-3 days of work)

Estimated time to marketplace MVP: 2-3 weeks

T3 Stack — Best Custom Build Foundation

For marketplace-specific logic that doesn't fit standard boilerplates:

// tRPC router for marketplace listings
const listingRouter = router({
  create: protectedProcedure
    .input(z.object({
      title: z.string(),
      price: z.number().positive(),
      description: z.string(),
      category: z.string(),
    }))
    .mutation(async ({ input, ctx }) => {
      const seller = await getSeller(ctx.user.id);
      if (!seller.stripeAccountId) throw new Error('Complete Stripe onboarding first');
      return db.listing.create({ data: { ...input, sellerId: ctx.user.id } });
    }),
});

Marketplace Categories and Their Variations

Marketplace Type	Extra Requirements	Example
Service marketplace	Booking, scheduling, escrow	Fiverr, Upwork
Product marketplace	Inventory, shipping, returns	Etsy, eBay
Rental marketplace	Availability calendar, deposits	Airbnb, Turo
Digital goods	License delivery, download limits	Gumroad, LemonSqueezy

Each type adds 1-3 weeks of additional development beyond the base marketplace infrastructure.

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Compare marketplace and SaaS boilerplates on StarterPick.