How Much Does It Cost to Build an Online Marketplace?

Short answer: building an online marketplace costs anywhere from about €39 a month to build privately on a SaaS marketplace builder (€129 a month on Kreezalid to open it to the public) to €20,000–€150,000 or more for custom development, with open-source and WordPress plugin setups somewhere in between. The build is rarely the biggest bill over time: payments, maintenance and getting your first buyers and sellers usually are.

The price depends on one decision more than any other: do you build the software, assemble it, or rent it? This guide gives you realistic ranges for each route, the cost lines that come after launch, what changes if you want a mobile app, and how to spend as little as possible before you know the marketplace works.

Marketplace cost at a glance

The figures below are estimate ranges for a first version with the usual marketplace features (accounts, listings, search, checkout with split payments, messaging, reviews, admin). Your scope and where your team is based move them a lot.

Route	Upfront cost (estimate)	Ongoing cost (estimate)	Typical time to launch
Custom development (freelancers or agency)	€20,000–€150,000+	Hosting, security, bug fixes and new features: a recurring developer budget	2–6 months, often more
Open-source or WordPress marketplace plugins	A few thousand to a few tens of thousands of euros, mostly developer time	Plugin licences, hosting that scales, updates and conflicts to fix	Weeks to a few months
SaaS marketplace builder (such as Kreezalid)	Little or nothing beyond your own time	A monthly plan: on Kreezalid from €39 to €599 a month	Days

Whichever route you choose, budget separately for payment processing fees, marketing and legal work. Those exist on every route.

What drives the cost of a marketplace

Before comparing quotes, be clear about what you are building. A B2B wholesale marketplace, a peer-to-peer rental site and a services marketplace with bookings need different features, and every feature is either built, configured or paid for. Kreezalid’s four marketplace models show what each one includes out of the box.

A functional first version usually needs:

• Registration, buyer and seller profiles
• Homepage, seller dashboards and an admin back office
• Listing pages and search with filters
• Cart and checkout, or booking and quote requests
• Payment integration with split payouts to sellers and your commission
• Messaging between buyers and sellers
• Reviews and basic moderation tools
• Transactional emails (order confirmations, payouts, password resets)

The fewer of these you build yourself, the lower your upfront cost. The more unusual your core workflow, the more likely you are to need custom work somewhere.

Option 1: custom development

Building from scratch gives you complete control over every screen and every rule. It is also the most expensive and slowest route.

How the cost adds up. Development cost is roughly hours multiplied by hourly rate. One breakdown by the development agency RubyGarage put a basic web marketplace at about 1,044 hours of work. At illustrative rates, that gives:

Illustrative hourly rate	Cost for ~1,044 hours
€30 per hour	about €31,000
€60 per hour	about €63,000
€100 per hour	about €104,000

Treat this as an order of magnitude, not a quote. Rates vary widely by country and seniority, and that estimate covers development only. A marketplace that works also needs UX and UI design, project management, testing, and the payment integration done properly, which together can add a significant share on top. A more complex marketplace (bookings, multiple payment flows, a mobile app) takes more hours.

Plan for overruns. Custom projects routinely drift from the initial scope once real users appear. Keep a contingency in your budget, and make sure you also fund the year after launch: hosting, security patches, dependency updates and bug fixes do not stop once the first version ships.

When it is worth it. Custom development makes sense when your core workflow is genuinely unique, you have engineering capacity, and the software itself is your competitive advantage. For most marketplace ideas, the building blocks (payments, commissions, listings, reviews) are the same everywhere. The comparison between building from scratch and using a platform covers that trade-off in detail, and our guide to creating a marketplace website walks through the choice of build route.

Option 2: open-source software or WordPress plugins

A middle route is to assemble a marketplace from existing pieces: an open-source marketplace script, or WordPress with WooCommerce and a multi-vendor plugin.

The software itself can be cheap or free, but the real cost is elsewhere:

• Developer time to install, configure, theme and connect the pieces, and to fix what the plugins do not do out of the box.
• Licences for premium plugins, extensions and themes, usually billed every year.
• Hosting that keeps up with traffic. A WordPress marketplace that starts to grow often needs more server power than expected, as we explain in creating a marketplace with WordPress.
• Maintenance: every core, plugin and theme update can break something, and you are the one who has to test and fix it.

This route suits someone comfortable with technical work, or with a developer on hand, who wants more control than a SaaS but cannot fund a custom build.

Option 3: a SaaS marketplace builder

A marketplace builder gives you the software as a service: templates, the core marketplace features, payments, hosting and maintenance, for a monthly fee. You configure the marketplace instead of coding it, so most founders do not need a developer to launch. Our guide to no-code marketplaces explains how this works.

Kreezalid is one of these builders; its prices are detailed in the next section. The trade-off of any builder is that you work within what the platform does. Design and branding are highly customisable, but deeply bespoke logic is not what a builder is for. If you start this way, these guides help with the next steps: choosing a marketplace template and choosing a marketplace payment solution.

What it costs on Kreezalid

Kreezalid’s public pricing, as of October 2026:

• Build, €39 a month: a complete private test environment. Every feature works, but there is no public marketplace and no custom domain. You use it to assemble your marketplace with test data.
• Launch, €129 a month: your marketplace opens to the public on your own domain, with unlimited buyers, up to 100 sellers, 2,000 listings and 250 transactions a month.
• Grow, €299 a month and Extend, €599 a month: higher allowances, more admins, domains and environments as volume grows.
• Kreezalid Plus, on quote: the Kreezalid team sets your marketplace up with you, for founders who want it built for them rather than by them. See Kreezalid Plus.
• Enterprise, on quote: custom integrations (ERP, PIM, CRM), SSO and SLAs for larger organisations. See Enterprise.

You can start with a 14-day free trial, no credit card required. Kreezalid takes no commission on your sales: you set your own commission and keep it, your plan is a flat monthly fee with a monthly transaction allowance, and payment processing is billed by your payment provider (Stripe’s fees apply per transaction, on every route).

To put that in perspective: a year on Launch is €1,548, which is less than a couple of weeks of a single freelance developer at the rates above.

The cost components to budget for

Whatever the route, a realistic marketplace budget has the same lines. Here is what each one covers.

Build

Development, or the plan that replaces it. On a custom build this is the biggest upfront line; on a builder it is a monthly fee.

Design

Branding, logo, templates and the user experience of your key flows (search, listing, checkout). With a custom build, UX and UI design is a job of its own. With a builder, you start from a template and adapt it, and the cost is mostly your time.

Payments and PSP fees

Every payment goes through a payment service provider (PSP) such as Stripe, which charges per transaction: typically a percentage of the amount plus a small fixed fee, roughly 1.5% to 3% depending on the card, the country and the provider. Check your provider’s own pricing page. These fees are charged on every route, so build them into your commission. Our guide to marketplace pricing strategy shows how to set a take rate that covers them.

Hosting and infrastructure

On a custom or open-source build, you pay for servers, a CDN, backups, monitoring, email delivery and security tooling, and the bill grows with traffic. On a SaaS builder these are included in the plan.

Maintenance

Security patches, updates, bug fixes and small improvements. On a custom or self-hosted build, plan for a recurring developer budget every month, even if it is only a few hours. This is the line founders most often forget.

Marketing and acquisition

Getting your first sellers, then your first buyers, usually costs more than the software. Ads, content, email, events and partnerships all cost money or time, and the amount depends entirely on how aggressive your plan is. Start with small test budgets per channel and keep the ones that bring transactions, not just sign-ups. Our marketplace marketing strategy guide covers the channels.

Legal and compliance

Terms of service for buyers and sellers, a privacy policy and GDPR compliance, and the rules that apply to platforms in your market (in the EU, for example, platform-to-business transparency rules and DAC7 reporting of seller income). Expect a lawyer’s review of your terms to cost anywhere from a few hundred to a few thousand euros, depending on your model and country.

Customer support

Someone has to answer buyers and sellers, settle disputes and moderate listings. Early on that is usually you, which costs time rather than money.

What about a mobile app?

Many founders ask what it costs to build a marketplace website and a mobile app. Native iOS and Android apps are a separate build: separate interfaces, app store reviews, and every feature maintained in two or three places. As an estimate, a native app can add a budget comparable to the website itself, and it adds to maintenance every month.

For a first version, you rarely need one. A responsive marketplace website works on phones from day one, and buyers will not install an app for a marketplace they do not know yet. Every Kreezalid template is responsive by default. Build a native app once you have repeat users who would genuinely use it, and you will know which features belong in it.

How to keep marketplace costs low

The cheapest marketplace is the one you do not overbuild before you know people want it.

1. Validate before you build. Talk to sellers and buyers, and try to complete a few transactions manually or with simple tools first. The pillar guide on how to create a marketplace includes a validation checklist.
2. Launch a minimum viable platform. Ship the smallest version that can complete one real transaction in one focused market, then add features your users actually ask for. See our guide to the marketplace MVP.
3. Rent before you build. Starting on a platform lets you learn what your marketplace needs at a monthly cost, and reserve custom development for later, only where it is justified.
4. Pay for scale only when you have it. On Kreezalid, you can assemble everything on Build at €39 a month and move to Launch the day you open to the public. Your work carries over.
5. Retain users instead of buying new ones. Churn drives acquisition costs up. Trust features such as reviews, verified profiles and secure payments keep buyers and sellers coming back, which lowers both marketing and support costs. Read more about building marketplace trust.

FAQ

How much does it cost to build a marketplace website?

As an estimate, €20,000 to €150,000 or more for custom development, a few thousand to a few tens of thousands of euros for an open-source or WordPress setup with developer help, and a monthly plan on a SaaS builder (on Kreezalid, from €39 a month to build privately and €129 a month to launch publicly).

How much does it cost to build a marketplace app?

A native mobile app is usually a separate project on top of the website, and can cost as much again. Most marketplaces start with a responsive website and add an app once they have repeat users.

How long does it take to build an online marketplace?

Custom development usually takes two to six months or more for a first version. On a marketplace builder, most founders launch in days from a template.

Does Kreezalid take a commission on sales?

No. You set your own commission on every transaction and keep it. Your plan is a flat monthly fee with a monthly transaction allowance, and payment processing fees are billed by your payment provider.

Start for the price of a test

A marketplace does not have to start with a six-figure development budget. Validate the idea, launch the smallest version that completes real transactions, and invest in custom development only once you know what your users need.

Start your 14-day free trial, no credit card required, or compare the plans first. If your workflow is unusual, walk through it with our team and we will tell you what is configuration and what would need custom work.