B2B SaaS DevelopmentWe build B2B SaaS
for teams,
not just users.
B2B SaaS is not B2C with a company field. It is multi-tenant, with team accounts, roles, seat-based billing, and the admin businesses expect. We build all of it, engineered in from the start, fixed-price and owned by you — the way we built our own platform.
app.yourmarketplace.com
Live marketplace
Two-sided liquidity, one platform
Supply and demand, matched. Listings, search, payments, and trust — built to move volume.
Recent activity
NNew listinglive
BBroker onboardedverified
EEnquiry matchedsent
PPayment cleared£4,200
Platforms and marketplaces we have built and worked on
sellyourboat.ioKompiPayeuropeanyachtbrokers.combusesforsale.comLoopa
What we buildBuilt for organisations,
not individuals.
When the customer is a company, the product has to be shaped around teams, roles, and isolation from the ground up.
01
Multi-tenancy
Each company's data cleanly isolated — foundational, built in from day one.
02
Teams & roles
Organisations, members, and the permissions businesses require.
03
Seat-based billing
Seats added and removed, per-seat and tiered pricing, done on Stripe.
04
Admin & controls
The management, audit, and controls larger customers expect.
05
Owned by you
The full multi-tenant codebase and billing, no platform lock-in.
B2B SaaS is not B2C SaaS with a company name field
The instinct is to build B2B SaaS as consumer SaaS with an organisation bolted on — same single-user logins, same personal subscription, just aimed at businesses. That instinct builds the wrong product, and the wrongness surfaces exactly when your first real customer arrives with a team. Because the customer is an organisation, not a person, the whole shape of the product is different.
B2B SaaS needs multi-tenancy so each company's data is genuinely isolated. It needs team accounts with roles and permissions, not a single login shared around. It needs seat-based or usage-based billing rather than a flat personal subscription. And it usually needs admin controls, audit trails, and the account structure a business buyer expects before they will trust you with their team's work.
None of that can be convincingly retrofitted onto a B2C build. It has to be designed in from the start, which is why B2B SaaS is a genuinely different engagement — and why building it as though it were B2C is one of the most expensive mistakes in the category.
The foundationMulti-tenancy is a decision you make on day one
Multi-tenancy — keeping every customer organisation's data cleanly separated within one product — is the foundation a B2B SaaS is built on, and it is one of the very few architectural decisions that is genuinely painful to change later. Retrofitting proper tenant isolation onto a product that was not designed for it touches almost everything, and gets riskier the more customers you have.
So we design it in from the first line. Users belong to their organisation with the right roles; the architecture ensures one tenant can never reach another's data; and the account, billing, and permission models all assume the multi-tenant shape from the outset. It is invisible work when it is done right, and a serious liability when it is not — the kind of thing that surfaces as a data-isolation incident with your most important customer.
Getting this right early is unglamorous and enormously valuable. It is exactly the kind of foundational decision we make deliberately, from having built and run multi-organisation software ourselves.
ProofWe run software that serves businesses
The clearest thing we can tell you about B2B SaaS development is that we operate software built for organisations, not individuals. sellyourboat.io is a Wall & Fifth venture that includes a white-label platform serving brokerages — businesses — with the accounts, tooling, multi-organisation structure, and Stripe billing that B2B software requires, carrying over 12,000 listings and a Claude-powered AI layer.
Building and running it means we have made the real B2B decisions on our own product: how to structure organisations and roles, how to keep tenants isolated, how billing works when the customer is a company rather than a person. Those calls were made with our own business on the line, so we build yours from operating experience.
We have also delivered platform and payments work across our client roster, including brokerage-facing tooling for europeanyachtbrokers.com. Software for businesses is the world we build in.
The buildProduction stack, fixed price, owned outright
Under every B2B SaaS we build is a real production stack: Next.js, React, and TypeScript, with PostgreSQL behind it, Stripe for billing, deployed properly and designed multi-tenant from the start. B2B SaaS carries a lot of surface area — tenancy, teams, roles, seat billing, admin — so the foundations have to be right, and we build them to be.
We work to a fixed price so a product with this much surface area does not expose you to an open-ended hourly meter. From 16,000 GBP for a focused B2B SaaS MVP, from 30,000 GBP for a larger build with granular permissions, admin, and integrations. Third-party usage — payment fees, AI inference — is passed through at cost, never marked up.
And you own all of it: the full codebase, the multi-tenant architecture, the billing setup, handed over on delivery. No platform you keep paying, no licensing, no lock-in. Yours to run, change, and scale with us or any team you choose.
ProofWe run multi-organisation software ourselves
sellyourboat.io includes a white-label platform serving brokerage businesses, with the tenancy and billing B2B software requires. We build yours from running one.
100+
broker organisations served
Stripe
billing we run live
12,000+
listings on our platform
100%
code ownership, yours
PricingFixed price, scoped to the product
A defined price for a defined build. You know the number before we start.
B2B SaaS MVP
from £16,000
Multi-tenant from the start: team accounts, roles, the core value, and seat-based billing.
Extensive Build
from £30,000
Granular permissions, admin, audit, and integrations — the controls larger customers require.
Embedded Partner
from £8,000 /mo
Ongoing senior involvement once live: evolving tenancy, billing, and features as customers scale.
Build B2B SaaS
teams will adopt.
Tell us the recurring value and the kind of organisation that buys it. We will build multi-tenant software shaped around real teams from day one.