What HDN does

HDN (Hypotheken Data Netwerk), legally Coöperatieve Vereniging HDN Beheer B.A., is a Dutch cooperative association founded in 1994 and headquartered in De Meern, Netherlands. It operates as the dominant standardized data-exchange infrastructure for the Dutch mortgage market, providing the HDN Platform and HDN Standard — a set of message formats and API-based connectivity protocols that enable secure information exchange between financial advisors, mortgage providers, insurers, servicers, and software vendors. The platform processes the overwhelming majority of Dutch mortgage applications, with 521,433 applications registered in 2022 representing approximately €118 billion in annual mortgage volume based on 2021 figures. HDN complements its core exchange infrastructure with value-added services including HDN Index (market benchmarking), brondata integration with Kadaster/Calcasa/NWWI, the IBL income-verification service using UWV data, Bankgarantiebericht, Actief Klantbeheer (active customer portfolio management), identity verification (Goed IDee), and sustainability tools (Verduurzamingstoolbox, Groene leningen), all governed under annual HDN Standard releases (HDN22–HDN26).

The organization operates as a member-owned cooperative with 212 connected parties and 146 working-group participants across mortgage providers (100% voting rights), insurers (50% voting), advisors, software vendors, servicers, and service providers. Revenue is generated through a multi-stream model: one-time entry fees for providers (€14,750–€29,500), annual membership contributions (€13,275–€26,550), per-endpoint fixed fees (€14,750), tiered user fees based on annual message volume (€1,325–€5,900), per-message transaction fees (€0.59–€2.95), optional HDN Index licenses (€763.54/year), and add-on fees for services like IBL (€11,700/year + €2.34/request). Distribution is exclusively domestic B2B, delivered via direct platform connections, software-vendor integrations (e.g., Accelerate, Elements), and franchise-chain onboarding. The organization maintains SOC 2 Type 2 assurance, ISO 27001 (via hosting partner), and GDPR/AVG compliance, and is governed by a two-person executive board (Reinier van der Heijden and Jennifer op 't Hoog until September 2026) under a Supervisory Board with rotating chairs.

Name

HDN

Legal name

Coöperatieve Vereniging HDN Beheer B.A.

Website

https://hdn.nl

Company type

Private

Founded year

1994

Operating status

Operating

Headcount range

1–10 employees

Short description

HDN is a Dutch cooperative association operating the dominant standardized data-exchange platform for the Dutch mortgage market, connecting 212 advisors, banks, insurers, and software vendors and processing nearly all Dutch mortgage applications.

Ownership category

akta.pro rank

Product category

Mortgage Data Exchange Infrastructure

NAICS

Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services (51821), Custom Computer Programming Services (541511)

SIC

Services-Computer Processing & Data Preparation (7374), Services-Computer Programming, Data Processing, Etc. (7370)

akta.pro primary industry

Collateral, Lien & Asset Valuation Platforms (Auto, Equipment, Real Estate) (FSAGAHAG)

Keywords

• Mortgage data exchange
• Mortgage interoperability
• Mortgage processing platform
• Financial housing domain
• Dutch mortgage network

Headquarters

HQ city

Utrecht

HQ country

Netherlands

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Software

Cost components

Technology or R&D, Personnel, Operations, Marketing or Sales, Others

Revenue model

1. Connection Number Subscription: All organizations using the HDN platform pay for a connection number (aansluitnummer) providing access to the platform and services. Standard subscription includes two connections.
2. User Membership Fees: Software suppliers, servicers, service providers, and distribution organizations with certain criteria pay annual user fees based on tiered message volume.
3. Member Membership Fees: Mortgage providers, insurers, and bank guarantee providers pay one-time entry fees and annual membership contributions, plus per-endpoint fixed fees.
4. Message Transaction Fees: Per-message fees for mortgage dossiers (€2.95), document dossiers (€1.18), and life/mutation/bank guarantee/external source messages (€0.59).
5. HDN Index License: Optional management information and benchmarking service license for connected partners.
6. Inkomensbepaling Loondienst (IBL) Add-on: Optional service with annual contribution and per-hypothec request fees for income determination using UWV data.

Pricing tiers

Go-to-market motion1 record

Distribution channels4 records

Marketing channels7 records

Core offering

HDN operates a secure standardized digital communication platform (the HDN Platform) and the HDN Standard — a set of standardized message formats — that enable mortgage advisors, mortgage providers, insurers, servicers, software vendors, and government data sources to exchange mortgage, insurance, and guarantee data in the Dutch market. Members and users subscribe to the platform via annual fees, per-message transaction charges, and one-time entry fees, and can license complementary services such as HDN Index (market intelligence), Brondata (source data integration), IBL (digital income verification), Actief Klantbeheer (active customer management), Bankgarantie-bericht (bank guarantee messaging), and the HDN Portal/App/Beheertool tools.

Product overview

HDN (Hypotheken Data Netwerk) operates as a cooperative organization providing a unified digital platform for standardized, secure information exchange in the Dutch mortgage and financial housing domain. The core offering consists of the HDN Platform and HDN Standard, which together enable communication between financial advisors, mortgage lenders, insurers, and other parties. The product ecosystem includes the HDN Portaal for portal access, HDN Index for market benchmarking, and the HDN App and Beheertool for certificate and schema management. HDN offers specialized services including Actief Klantbeheer (active customer management), Bankgarantie-bericht (bank guarantee messaging), Brondata (source data integration with Kadaster, Calcasa, NWWI), Inkomensbepaling Loondienst (IBL, income determination for employees), Inkomensverklaring Ondernemer (income statements for entrepreneurs), Goed IDee (identity verification), Groene leningen (green loans), and Verduurzamingstoolbox (sustainability tools). Supporting services include HDN Academy (training), Marktcijfers (market data), and annual HDN Certificering. The HDN Standard is updated annually with major releases (HDN22 through HDN26 planned), while the platform API enables technical integration for software suppliers.

Differentiator

Problem solved

Functional benefit

Products and services

• HDN Platform Secure digital communication platform that enables standardized information exchange between financial advisors, mortgage providers, insurance companies, servicers, and other parties in the Dutch mortgage and financial housing domain. Accessed via the HDN API (v2.9.0) and connection numbers; SOC 2 Type 2 certified infrastructure hosted in the Netherlands.
• HDN Standaard (HDN Standard) Standardized message format and protocol governing how mortgage, insurance, guarantee, and supporting data are exchanged through the HDN Platform, updated through annual releases (HDN22–HDN26).
• HDN Index Management information and benchmarking service providing market trends and portfolio performance analytics to connected partners (licensed to mortgage providers, insurers, and advisors).
• HDN Certificaat (HDN Certificate) Annual digital certificate used to authenticate and identify organizations on the HDN Platform; being replaced for advisors by simplified portal-based connection renewal via the HDN Portaal.
• HDN App Application for managing HDN certificates, viewing connection numbers, certificate validity, and certificate renewal, and revoking certificates when employees leave.
• HDN Beheertool Schema management tool that lets mortgage providers control which data they want to receive in mortgage applications, set validations, and enforce conditions on HDN messages received.
• HDN Portaal Web portal providing connected parties with access to HDN Platform services, HDN Index, HDN Standard documentation, and user communications; used for annual connection renewal and certificate management.
• Actief Klantbeheer Service enabling financial advisors to retrieve current mortgage status information directly from lenders via the HDN Informatiebericht in their advice software, supporting real-time active customer management.
• Bankgarantie-bericht Service for electronically requesting and delivering bank guarantees through the HDN Platform, enabling advisors to request guarantees from providers such as Nationale Waarborg directly from their software package.
• Brondata Source data service enabling advisors to use authoritative raw data from Kadaster, Calcasa, NWWI, and UWV in their advisory software for mortgage acceptance, eliminating the need for paper documents; includes a Brondata Dashboard for lenders and advisors.
• Inkomensbepaling Loondienst (IBL) Income determination service for salaried employees that calculates testable income based on UWV insurance data, replacing the traditional employer declaration workflow.
• Goed IDee Identity verification service integrated with HDN, supporting secure customer identification processes in the mortgage chain through the GoedIDee consortium.
• Groene leningen Green loans service supporting sustainable mortgage financing and energy-efficient home improvements through the HDN Platform.
• Inkomensverklaring Ondernemer Income statement service for self-employed individuals, enabling digital application for entrepreneur income verification through the HDN Platform.
• Verduurzamingstoolbox Sustainability toolbox service supporting energy efficiency and home sustainability improvements in the mortgage process.
• HDN Academy Educational platform offering webinars and training sessions on the HDN Standard, HDN Index, HDN Platform, certificate management, and various HDN services for advisors and connected parties.
• HDN Certificering Annual certification process for HDN users, with working groups setting certification topics and dashboards for monitoring compliance quality across the Dutch mortgage chain.
• Marktcijfers Market data and statistics service providing quarterly and annual overviews of mortgage applications, customer profiles, regional developments, and market trends based on HDN registration data.

Quantifiable outcome

• Nearly all mortgage applications in the Netherlands are processed through HDN
• +1 more outcomes

Named customers34 records

Segments6 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

Yes

API docs

API detail

Core technology

AI maturity

App detail

Integration6 records

Feature9 records

Partnerships

Twelve partnerships are on record, tiered core and supporting.

• Brondata Convenant PartnerscoreStrategic or Co-development Partner · 19 December 2022Over 40 chain parties signed a covenant to accelerate sharing of brondata within the mortgage chain, enabling mortgage acceptance based solely on source data.
• KadastercoreTechnology or IntegrationKadaster provides property data through HDN brondata services, enabling EigenaarsInformatieBericht, EigendomsInformatieBerichten, and HypotheekInformatieBericht for mortgage applications.
• UWVcoreTechnology or IntegrationUWV provides insurance data for the Inkomensbepaling Loondienst (IBL) service, enabling income verification for salaried employees without employer declarations.
• NWWIcoreTechnology or IntegrationNWWI provides valuation reports through TaxatieBericht for mortgage applications via HDN.
• CalcasacoreTechnology or IntegrationCalcasa provides DesktopTaxatieBericht and ModelmatigeWaardebepalingBericht for valuations in mortgage applications.
• Nationale Hypotheek Garantie (NHG)coreStrategic or Co-development PartnerNHG collaborates on standards development and accepts bank guarantee messages via HDN. Also partners on sustainability initiatives and Monitor Koopwoningmarkt.
• CleverbasesupportingTechnology or IntegrationProvides digital identity verification services as part of the GoedIDee service for secure customer identification.
• OcktosupportingTechnology or IntegrationDigital document provision service integrated with HDN for streamlined document handling.
• Nederlandse Vereniging van Makelaars (NVM)supportingStrategic or Co-development PartnerCollaboration on Monitor Koopwoningmarkt (Housing Market Monitor) providing comprehensive market data.
• Monitor Koopwoningmarkt ConsortiumsupportingStrategic or Co-development PartnerCollaboration between Archidat, CBS, De Hypotheekshop, HDN, Locatus, NHG, NVM, SVN, VEH, and WoningbouwersNL for housing market research.
• Vereniging Eigen Huis (VEH)supportingStrategic or Co-development PartnerCollaboration on sustainability initiatives and housing market research.
• GoedIDee ConsortiumsupportingStrategic or Co-development PartnerCollaboration on digital identity verification including Cleverbase, and other partners for the GoedIDee service.

Scale indicators8 records

Recent moves6 records

Expansion highlights4 records

Broad incumbents

• Plaid: Plaid is a global financial data connectivity platform linking bank accounts to applications via standardized APIs. It is comparable to HDN in being a multi-sided data-exchange utility that standardizes financial information flows between consumers, financial institutions, and downstream applications.
• Yodlee (Envestnet): Yodlee is a long-standing financial data aggregation platform serving banks, fintechs, and lenders. Comparable to HDN as a utility that standardizes how financial transaction data is exchanged between providers and downstream applications.
• Finastra: Finastra is a large financial software vendor covering lending, banking, and capital markets infrastructure. It is comparable to HDN's LendTech-adjacent middleware role, though at a much broader scope and not specialized in Dutch mortgage data exchange.
• ICE Mortgage Technology (formerly Ellie Mae / Black Knight): ICE Mortgage Technology is a leading US mortgage-origination software and data-exchange vendor. It is comparable to HDN as a backbone infrastructure provider for mortgage data exchange, though operating at a much larger scale in a different geography.

Others

• Stater: Stater is one of the largest Dutch mortgage servicers and is connected to the HDN platform as a partner. It is comparable as a core participant in the same Dutch mortgage data chain, though operating downstream of HDN as a servicer rather than as the exchange itself.
• Ohpen: Ohpen is a Dutch core banking software provider connected to the HDN platform. It is comparable as a Dutch financial software ecosystem player that integrates via HDN for mortgage data flows.
• Topicus: Topicus is a Dutch financial software vendor whose products integrate with the HDN platform for mortgage origination. It is comparable as an ecosystem participant in the Dutch mortgage data chain, sitting adjacent to HDN as an integrated software provider.

Direct peers

• Tink (Visa): Tink, owned by Visa, is a European open-banking platform providing standardized APIs for account, income, and identity data. It overlaps with HDN's role as a Dutch financial data-exchange utility, particularly in income verification (comparable to IBL) and PSD2-driven data sharing.
• MX Technologies: MX provides financial data aggregation, connectivity, and money-management infrastructure used by banks and fintechs. It is comparable to HDN as a data exchange layer that connects financial institutions to consumer-facing applications via standardized APIs.

Emerging players

• Codat: Codat builds standardized APIs for business financial data (accounting, banking, commerce) used by lenders and fintechs. It is comparable to HDN in providing standardized, API-driven data exchange infrastructure for financial decisioning, albeit focused on SMB rather than mortgage.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/vereniginghdn
• Xx.com/HDNStandaard

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles14 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about HDN