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Rated 4.9 out of 5

Whoever builds your industry’s platform owns the market. See yours working, free with your project.

  • B2B ordering portals
  • Marketplaces
  • Tiered pricing
  • ERP integration

We build B2B ordering portals and marketplaces with real B2B logic (tiered pricing, credit limits, per-customer catalogs, ERP integration) and show you a clickable prototype within 1 to 3 weeks of the first call.

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  • Prototype of your portal in 1 to 3 weeks
  • Booking platforms delivered for two brands
  • ERP integration designed in the spec, not phase two
Mobile app screens from a Greenstone-built product

Our real "price": the prototype comes free with your project.
The build is a fixed quote, set after you've seen it. If we don't scope it right, it's on us.

  • Scope fixed after the prototype
  • No hourly billing, no scope creep
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Greenstone is for you, if…

01

Your customers still order by email and your people re-type them

Count the people in your office whose job is re-typing orders your customers already wrote. That’s the budget for the portal, found, and the error rate goes with it.

02

Every agency shows you webshops. You are not a webshop.

Tiered pricing, credit limits, per-customer catalogs, ERP sync: that’s the foundation of B2B commerce, not add-ons to a shop template. If a vendor says “like a webshop, but for companies”, walk away.

03

If you don’t build the platform, someone in your niche will

Every niche ends up with one platform its customers order through. Whoever builds it first sets the terms for everyone else. We help you be the one who owns it, not the one who has to join it.

04

Your co-owner needs convincing. You need something to show, not describe.

The prototype is your internal pitch deck: a working, clickable portal your partner can try, not a slide about one. Most partner meetings end differently after that.

Who this is NOT for:

Classic B2C e-shops (that’s not what we do), companies under ~€1M annual revenue, and anyone choosing a vendor on the lowest bid. We build B2B commerce infrastructure for companies playing to own their niche.

What do you get?

Everything between “orders come in by email” and “our niche runs on our platform”, all from one partner.

FREE WITH PROJECT AFTER YOU SIGN
  1. 01We research you first
  2. 02Call: analyst + PM + owners
  3. 03Business & tech spec
  4. 04Working prototype
  5. 05Your decision
  6. 06Build + legal in parallel
  7. 07Launch
  8. 08Partnership
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FREE WITH PROJECT
  1. 01We research you first
  2. 02Call: analyst + PM + owners
  3. 03Business & tech spec
  4. 04Working prototype
  5. 05Your decision
AFTER YOU SIGN
  1. 06Build + legal in parallel
  2. 07Launch
  3. 08Partnership
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01 / DE-RISK

Tell us how your customers order today. Within 1 to 3 weeks you’re clicking through the portal version (catalogs, pricing, order flow) before you’ve signed anything long-term.

Show your co-owner, don’t tell them.

02 / SUBSTANCE

Order-processing unit economics, adoption strategy, pricing architecture: analysed before the build, so the platform succeeds commercially, not just technically. We ask what your customers need to actually switch.

A portal nobody logs into is just an invoice.

03 / COVERAGE

Tiered pricing, credit limits, per-customer catalogs and ERP integration designed in the specification. Plus design, legal via our partner law firm and rollout: one accountable partner.

ERP in the spec, not in phase two.

Why we can move this fast (and keep it affordable):

We run our own delivery on the latest AI models and automation: research, analysis, prototyping and engineering, accelerated end to end. That means faster builds and lower cost for you. And the same AI and automation expertise gets built into your product, optimizing your processes and operating costs from day one.

How do we compare to a webshop agency?

Eight parameters that decide whether your build ships right the first time.

Typical e-commerce agency
  • Proof before you commit

    Template demo and a slide deck

  • B2B commerce logic

    Shop platform + “B2B plugin”, customized forever

  • ERP integration

    “That’s phase two” (it never comes cheap)

  • Platform experience

    Biggest reference: a national e-shop

  • Team continuity

    Seniors pitch, juniors deliver

  • Who you talk to

    Account manager between you and the team

  • Beyond the code

    Launch, invoice, goodbye

  • Price (honestly)

    Local rates 2–3× higher, or cheap-template risk

Greenstone
  • Proof before you commit

    Working clickable prototype in 1 to 3 weeks

  • B2B commerce logic

    Tiered pricing, credit limits, per-customer catalogs as the foundation

  • ERP integration

    Designed in the specification, before the prototype

  • Platform experience

    Multi-brand booking & commerce platforms delivered

  • Team continuity

    Senior cross-functional team held on the account

  • Who you talk to

    Both owners on every deal + dedicated PM

  • Beyond the code

    Adoption strategy, legal and rollout, A to Z

  • Price (honestly)

    Senior CEE talent below Western rates

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The short version:

A B2B plugin on a shop platform looks cheaper, until the customizations start and never stop. Infrastructure built around your trade terms costs more upfront and less every year after. The question isn’t “who’s cheapest”, it’s “whose platform will your niche actually run on”.

Who you’ll actually
be talking to.

Not an account manager. Not a sales team. The two people who own the company, on every deal, from first call to launch, together with our project managers.

As featured in

Forbes

Why software built by isolated programmers is pre-disposed to fail, and what "business context" delivery means.

Portrait of Teodor Derzsi
Teodor DerzsiCEO & Founder
Portrait of Peter Petöcz
Peter PetöczExecutive CEO
Portrait of Lenka Šinská
Lenka ŠinskáProject manager
Portrait of Magdaléna Knapová
Magdaléna KnapováHead of processes

Platforms, portals and commerce infrastructure we’ve shipped.

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Woyablue - the world of online cruises in one place

19,557 cruises, 16 destinations, one search

A booking platform that pulls the offerings of dozens of cruise lines into a single search. Customers filter by destination, date and length in seconds instead of comparing offers of individual operators.

woyablue.com/
Woyablue homepage
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Results our clients point to.

Live products you can click through today, not promises.

Aurean Journeys - Exclusive high-end ship cruises for the most demanding clientele
Administration: orders & availability · [METRIC]
Woyablue - Ship cruises marketplace comparing over 19,000 cruises

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Tell us what you need.

Tell us how your customers order today, in five sentences. We’ll come back with hard questions, an honest adoption assessment and a clickable prototype of your portal within 1 to 3 weeks. NDA on request. No booking calendars. We reply personally and find the time together.

  • Consultation & prototype free with your project
  • No booking calendars, personal replies
  • Answered by the owners, in writing
  • NDA on request
Step 1 of 3Prototype free with your project
Your company
Your role *
Company annual revenue *
Your product
Product stage *
Contact

Thank you, we’ve got it.

One of the owners will reply personally, in writing, within one business day.

We partner with founders whose long-term vision fits our qualification process, so we reserve the right not to take on every project that applies.

Frequently asked questions

No catch, just one condition. To start the prototype, you pay a deposit, which we agree on after our first qualification meeting. If you move forward with the full build, we credit 100% of that deposit toward your project, so the prototype costs you nothing extra. If you decide not to continue, the deposit covers the work on the prototype, and the prototype is yours to keep.

A B2C-style shop and B2B commerce are different animals. If your customers need their own pricing, credit terms and catalogs, and your team still re-types orders into the ERP, the shop isn’t doing the job. We analyse what’s worth keeping before we touch anything.

Integration is mapped in the specification phase, before the prototype and before the quote. If there’s a blocker, you’ll know it in week one, not month six.

That’s the question we design for. Adoption strategy (what your customers need to actually switch) is part of the analysis, not an afterthought. A portal nobody logs into is a failure we don’t ship.

Mid-size and large engagements, typically from the tens of thousands of euros, scoped fixed after the prototype. A shop-plugin setup is cheaper upfront and more expensive every year after.

Central European engineers are among the most sought-after in the world. That’s who builds your platform, at rates below Western markets. EU contracts, English-speaking owners on every call, multi-brand platform references.

You do. Full handover of code, documentation and IP is contractual. The platform is your asset and your moat, not a rented storefront.

That’s exactly how we architect it: phase one is your customer portal, and the architecture is ready for multi-vendor. Sell phase one, build for the ambition.

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