The first AI-native kopersbegeleiding platform

Your buyers,
guided.
Every step.

Kay coordinates the full new-build journey — from contract signing to key handover. Developers connect their project. Buyers get a personal guide, in their language, 24/7.

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Live trial · Netherlands
Buying a new-build home? Kay is free for every buyer — no developer needed.
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Kay · by IZIKEY
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The problem

Buyers drown. Klantmanagers drown.

The problem shows up on both sides — and a portal alone fixes neither.

From a buyer's seat
Six counterparties, two portals, no one coordinating. 20+ emails to verify one wijziging. Meerwerk deadlines with no nudging. Wft questions answered by the wrong person. The buyer becomes the coordinator by default.
Sluitingsdatum was December 2025; I had it on three calendars.
From a klantmanager's seat
~80 buyers in flight, across multiple projects, each in a different fase. Same questions every project — KO/AO clauses, meerwerk windows, termijnnota timing, voorschouw prep. Newsletters and presentation days don't scale personal — but personal is what the 9+ requires.
We don't need another portal. We need the routine 80% off our plate.
20+
defects per home at oplevering, on average. Five+ counterparties — developer, contractor, notary, mortgage adviser, makelaar — and no one coordinating between them. The buyer becomes the coordinator by default. Source: Vereniging Eigen Huis · 14,000+ inspections
Kay handles the 80%. Klantmanager keeps the 20%.
Two sides, one platform

What buyers see. What you see.

Same product, two surfaces. Buyers chat with Kay on web or WhatsApp. Klantmanagers manage every project, every escalation, every broadcast — from one screen.

izikey.nl/kay
Kay buyer view
For the buyer
Kay knows where you are. And what comes next.
Project, phase, contract, mortgage, financial breakdown — all loaded into Kay's context. Ask anything; answers come from your documents, not generic training data.
izikey.nl/portal
Klantmanager portal
For the klantmanager
One screen. Every project. Every escalation.
Live engagement, unit status, open escalations, broadcast composer with Write-with-Kay. Every project the klantmanager owns, in one view.
Built on a real purchase · validated end to end
Natan Soron is the founder of IZIKEY — and a buyer of BN87 Dillekwartier in Arnhem. KO and AO signed, notary executed late 2025, oplevering Q2 2027 with VanWonen and Veluwezoom Verkerk. Three real projects loaded with actual paperwork. Synthetic households spanning MS0–MS5 — including the hardest profiles, complaint and distress — run as a regression suite on every change before any developer sees it.
izikey.nl · live KVK 42052137 · Arnhem Used daily
Intelligence & escalation

Smart, growing, and knowing when to hand off.

The value of an AI coordinator is not how clever it sounds — it's how reliably it gets the buyer to the right answer or the right person.

01
Reasoning
Kay runs on Anthropic Claude (Sonnet) — frontier-grade reasoning at viable cost. Every turn loads a structured per-buyer context: project, building, household, current milestone, open deadlines. Documents are scoped strictly to personal, building, or project. Privacy is structural, not promised.
02
Learning
When a buyer surfaces a question Kay can't answer well, the gap is captured, reviewed, and — if appropriate — promoted into the knowledge base. The next buyer with the same question gets a better answer than the first. Buyer data is never used to train any model.
03
Escalation resolve
A coordinator's most important property is knowing the edge of its own competence. Kay is engineered to escalate, not to bluff. When a question crosses a boundary, Kay says so — and routes the buyer.
When Kay hands off
Wft topics
Hypotheek, ORV, AO, woonlasten
Licensed adviseur
Project edge cases
Anything the KB doesn't cover
Klantmanager (with conversation context)
Physical inspection
Oplevering & voorschouw
Independent opleveringskeuring
Legal disputes
Contract conflict, formal complaints
Counsel or VEH legal helpdesk
A buyer never gets stuck talking to Kay when a human is the right answer.
The buyer journey

Six milestones, end to end.

Every household sits at exactly one milestone at a time. Kay's tone, depth, and proactive prompts adjust to where the buyer actually is. Tracked in the database, not just the chat.

MS0
Reservering
Onboarding · unit confirmation · Kay opens the journey, frames what's about to land.
MS1
KO/AO + Passeren
Contract walkthrough · clause-by-clause · notary execution · vault captures the signed file.
MS2
Koperskeuzes & Meerwerk
Optielijsten translated to plain language · deadlines tracked · cumulative cost surfaced as choices land.
MS3
Bouw & Financing
Termijnnota's explained · bouwrente tracked · mortgage questions routed to licensed adviseur.
MS4
Pre-Oplevering
Voorschouw prep · 5%-regeling · structured inspection log · independent keuring routing.
MS5
Oplevering & Nazorg
Opleverpunten tracked · contractor responses chased · Woningborg / SWK warranty paths.
Who it's for

Built for developers.
Used by their buyers.

IZIKEY is a B2B platform. Developers connect their project — buyers get Kay. Lite is free for any Dutch nieuwbouw buyer, with or without their developer on board.

For developers
The kopersbegeleiding platform you'd build, if you had the time.
Kay handles the volume of repetitive questions, document delivery, and milestone prep — in your name. Your klantmanager keeps the relationship and loses the inbox.
  • Buyer questions resolved before they reach the klantmanager — for the 80% that don't need a human
  • Real-time sentiment, not after-the-fact surveys — including supply-chain signal
  • Document review and cross-validation across the chain
  • Sits on top of your existing portal. Doesn't replace, doesn't compete, doesn't migrate
  • Wft-safe by design — informs, never advises on mortgage, ORV. Your brand, never ours
Book a demo →
For buyers
Buying a new-build home? Start with Kay, free.
Kay Lite is free for any Dutch nieuwbouw buyer — no developer needed. General guidance on contracts, deadlines, and the buying process. If your developer uses IZIKEY, Kay also knows your specific project.
  • Free to start, on WhatsApp or web
  • General nieuwbouw guidance: contracts, deadlines, the koop-aanneming process
  • 24/7, in your native language
  • If your developer is on IZIKEY: Kay knows your KO, AO, schedule, and options
  • Wft-safe — Kay informs, routes mortgage and ORV questions to a licensed adviser
Start free →
What Kay does
Document hub
Every contract, invoice, and certificate from every party — developer, contractor, notary, mortgage advisor — in one place. Kay explains what each one means.
Contract review
Kay reads the purchase and construction agreements before the buyer does. Differences from the template flagged. No surprises on signing day.
Extra work coordination
Room by room, Kay builds the buyer's choices brief based on how they plan to live. Deadlines tracked. Shared with the contractor before the intake meeting.
Notary preparation
Kay cross-checks the settlement statement, flags discrepancies, verifies the construction deposit, and prepares the buyer for what happens on the day.
Construction updates
Instalment invoices explained, progress contextualised, milestone notifications — all personalised to the buyer's unit number.
WhatsApp + web
Dutch and English natively. Buyers chat on WhatsApp or on the web — same Kay, same context, wherever they are.
Behind Kay

Not just a chat. A full toolbox.

Every buyer gets a structured set of tools — documents, deadlines, costs, contacts. Accessible through Kay or directly. The chat is the front; the platform is the work.

izikey.nl/kay
Kay document hub
Document hub
Every contract, every certificate, every invoice — in one place.
Personal vault for the buyer's own paperwork. Project library for technische omschrijving and project-FAQ. Indexed, searchable, always current.
izikey.nl/kay
Kay tools
Tools that work for the buyer
Deadline tracker. Cumulative cost. Voorschouw log. Stakeholder directory.
Each tool earns its place because it solves something the buyer was doing manually — or not doing at all. Surfaced through Kay when relevant; always available directly.
For developers

Kay handles the 80%.
Your klantmanager keeps
the 20% that matters.

Your team is good at the buyers who need them. They lose hours every week to the buyers who just need an answer. Kay handles the answer-this-now volume — in your name — and escalates anything that crosses a boundary, with full conversation context attached.

  • Push announcements and documents directly to buyers via Kay
  • Buyers arrive prepared to every meeting — fewer calls, faster handovers
  • Extra work brief arrives before the intake — more productive meeting
  • Escalation inbox — Kay flags only the questions you need to answer
  • White-label ready — Kay carries your project name, not ours
  • Sits on top of your existing portal — doesn't replace, doesn't compete, doesn't migrate
Book a demo → See offer
izikey.nl/portal · escalations
Klantmanager escalations triage
Common questions

Everything you need to know

Is Kay a generic chatbot or does it know my specific project?
Kay knows your project's specific documents, contracts, timelines, and buyer details. It's not a general FAQ tool — it's a coordinator built around your data.
How long does onboarding take?
One session with us, typically 2–3 hours. We set up your project, configure Kay for your process, and run a test with a pilot buyer before going live.
Does Kay replace our klantmanager?
No — Kay handles the volume of repetitive questions, document delivery, and milestone prep. Your team handles the decisions and escalations that only humans can resolve.
How is buyer data protected — and what won't Kay do?
Wft-safe by design — Kay informs but never advises on mortgages, ORV, or other regulated products. AVG/GDPR compliant, EU-only data residency (Supabase, Zürich), with a data processing agreement per developer partner. Your brand, never ours — Kay carries your project name. Identity documents are never echoed back.
What is Kay Lite — the free version?
Kay Lite is free for any Dutch new-build buyer, regardless of developer. General knowledge about contracts, deadlines, and the purchase process — via WhatsApp or web. No project setup needed.
What happens after the building is delivered?
Kay supports buyers through the warranty period, defect reporting, and the first year in their home. The journey doesn't end at key handover.
Trust & integrations

Built EU-first. Integrates with what you already run.

Stack & security
Anthropic Claude · Sonnet Zero Data Retention Supabase EU · Zürich Per-household RLS Cloudflare Worker Mollie · iDEAL
Buyer data stays in the EU. No buyer data used to train any model. RLS-scoped at the database, not promised in policy.
Sits alongside
Volgjewoning HomeDNA HoomCTRL BouwVision JPDS
IZIKEY sits on top of the systems you already run. Doesn't replace, doesn't compete, doesn't migrate. Activated where the upstream system exists; standalone where it doesn't.

Bring the project.
We'll bring the live product on the screen.

Thirty minutes. izikey.nl on the screen, your buyer data side-by-side, every question answered live.

Book a demo → Start free as a buyer →
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