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B2B Marketplace Development

We build B2B marketplaces
businesses trust
enough to transact.

B2B is not consumer with bigger numbers. The deals are considered, the sums are large, and trust decides everything. We build platforms with verified suppliers, quoting and enquiry flows, and the trust layer that lets businesses commit real money — the way we run our own.

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Platforms and marketplaces we have built and worked on
sellyourboat.ioeuropeanyachtbrokers.combusesforsale.comKompiPayLoopa
What we build

Built for how businesses
actually buy.

B2B marketplaces are enquiry and trust engines, not one-click checkouts. We build for the way real business transactions happen.

01

Verified suppliers

Vetting and verification built in — because in B2B, trust is the product.

02

Quote & enquiry flows

The considered, multi-step path real B2B deals move through.

03

Structured supply

Listings built so claims are consistent, comparable, and checkable.

04

Business accounts

Permissions, records, and the account structure procurement needs.

05

Owned by you

The whole codebase and data model, no marketplace-SaaS lock-in.

The real difference

A B2B marketplace is not a consumer one with bigger numbers

The instinct is to treat a B2B marketplace as a consumer marketplace scaled up — same listings, same search, same checkout, just pricier. That instinct builds the wrong product. B2B transactions are higher-value, less impulsive, and rarely a single click. Buyers compare, request quotes, negotiate, and often need internal approval before anything is committed.

So the spine of a B2B marketplace is not instant checkout — it is the enquiry-and-quote flow. The platform generates a qualified connection and a clean paper trail; the deal is considered, sometimes negotiated, and often closed on agreed terms. Force one-click checkout onto a market that does not buy that way and you build friction where you meant to build a marketplace.

And the buyer is usually a business, not a person: procurement rules, approvals, records, multiple people involved. That changes how accounts, permissions, and history need to work. We build for the actual shape of a B2B transaction, not a consumer template with the prices raised.

Trust is the product

In B2B, verification is not a badge — it is the whole thing

No business commits meaningful money to an unvetted stranger. So in a B2B marketplace, trust is not a nice-to-have layered on top — it is the core of what makes the platform work at all. Buyers show up because they believe the suppliers are real, capable, and accountable. Lose that and the marketplace has nothing.

That means verification has to be built in from the foundation: vetting suppliers before they can list, structuring listings so claims are consistent and checkable rather than free-text marketing, and building the reviews and track-record layer that lets a buyer commit with confidence. It is deliberate work, and it is exactly the kind of trust infrastructure we run on our own platform every day.

Get the trust layer right and the marketplace compounds — every verified supplier and every clean transaction makes the next buyer more willing. Get it wrong and no amount of listings or polish will make businesses transact through it.

Proof

We run a B2B marketplace: sellyourboat.io

The clearest thing we can tell you about B2B marketplace development is that we run one. sellyourboat.io is a Wall & Fifth venture, and it is B2B at its core: its supply side is more than 100 vetted brokers — businesses, not casual sellers — managing over 12,000 listings across 18 countries, with the verification, structured listings, and broker tooling a professional market demands.

Operating it means we have solved the real B2B problems on our own product: how to vet the supply side, how to structure listings so a professional buyer can trust them, how to build tooling that makes brokers want to stay, and where the money and the trust actually sit in a high-value transaction. We made those calls with our own business on the line.

We have also delivered platform work for busesforsale.com and europeanyachtbrokers.com — both dealer and broker-facing, both firmly in the B2B world. This is the category we know best.

The build

Production stack, fixed price, owned outright

Under every B2B marketplace we build is a real production stack: Next.js, React, and TypeScript, with PostgreSQL behind it, deployed properly. B2B platforms carry a lot of surface area — verification, quoting, business accounts, structured supply — so the foundations have to be solid. We build them to be.

We work to a fixed price so a project with this much surface area does not expose you to open-ended hourly billing. From 16,000 GBP for a focused B2B marketplace MVP, from 30,000 GBP for a larger platform with verification workflows, quoting, order management, and admin. Any third-party usage is passed through to you at cost, never marked up.

And you own all of it — the codebase, the data model, the infrastructure — handed over on delivery. No marketplace SaaS you keep paying, no licensing, no lock-in. Yours to run, change, and scale with us or with any team you choose.

Proof

We run a professional, B2B marketplace

sellyourboat.io is a Wall & Fifth venture serving vetted brokers — businesses — at scale. The trust infrastructure is real, and it is ours.

100+
vetted broker businesses
12,000+
professional listings
18
countries
1
platform we own & run
Pricing

Fixed price, scoped to the market

No hourly billing on a platform with real surface area. A defined price for a defined build.

B2B MVP
from £16,000

Verified listings, supplier profiles, search, and a quote or enquiry path built for business buyers.

Extensive Build
from £30,000

Verification workflows, quoting, order management, business accounts, and admin at scale.

Embedded Partner
from £8,000 /mo

Ongoing senior involvement once live: growing the supply side, evolving the trust layer, scaling the market.

FAQ

Questions people ask

The transactions are higher-value, less impulsive, and rarely one click. Buyers compare, request quotes, negotiate, and often need approval, so the platform is built around enquiry and quoting rather than instant checkout. Trust matters more because the sums are larger, so supplier verification is central. And the buyer is often a business with procurement rules, not an individual, which changes accounts and records.

Often not the way consumer ones do. Many B2B deals close off-platform on agreed terms, so a large share of B2B marketplaces are enquiry-and-quote engines: they generate the qualified connection and paper trail, and money moves through existing channels. Others handle payment on-platform. We build for whichever model fits, rather than forcing checkout where it does not belong.

In B2B, trust is the product. Verification is core, not a badge: vetting suppliers before they list, structuring listings so claims are checkable, and building the review and track-record layer that lets a buyer commit real money. This is exactly the trust infrastructure we run on our own platform.

From £16,000 for a focused B2B MVP: verified listings, supplier profiles, search, and a quote path. From £30,000 for a larger platform with verification workflows, quoting, order management, and admin. Both fixed price, and you own all of it. Third-party usage is passed through at cost.

Yes. sellyourboat.io is a Wall & Fifth venture and B2B at its core: 100-plus vetted brokers — businesses — managing 12,000-plus listings across 18 countries, with the verification and tooling a professional market needs. We have also delivered platform work for busesforsale.com and europeanyachtbrokers.com.

Completely. The full codebase, infrastructure, and data model, handed over on delivery. No licensing, no lock-in, no marketplace SaaS you keep paying. Yours to run, change, and scale with us or any team you choose.

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Marketplace Development

The full picture on two-sided platforms that reach liquidity.

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MVP Pricing

Fixed pricing for B2B marketplaces and other builds: £16,000 and £30,000.

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AI App Development

B2B platforms with an AI layer, like the assistant on sellyourboat.io.

Build a B2B marketplace
businesses will trust.

Tell us the market, the supply side, and how deals actually close in it. We will build a platform shaped around real business transactions.

Book a scoping call →