Acato.
Dutch open-source specialist from Almere. Builds and hosts environments for municipalities and care institutions for more than a decade, focused on GDPR compliance, NLDS conformance, and long-term management.
Where Acato shines.
Three apps Acato has shipped to production at multiple municipalities and three sectors where they hold the most context.
OpenRegister at scale.
Schema design and migration patterns for registers with millions of records. Acato has shipped OpenRegister to municipalities with the largest live registers in the network.
OpenCatalogi for Freedom of Information Act.
WOO publication flows including the eleven categories, federation to data.overheid.nl, and the audit evidence pack that surrounds each disclosure.
DocuDesk for inbound case correspondence.
Auto-classification, anonymization, and routing for high-volume inbound mail at government agencies. Templates for annual reports, decisions, and objections.
Live deployments.
Three of Acato's production deployments. Sectors and apps used. Talk to Acato for a full list.
Municipality of Rotterdam
WOO portal in production since Q2 2025. Eleven categories live, 18,000 documents publicly searchable, audit log integrated with DMS.
Province of South Holland
Subsidy register migrated to OpenRegister. ZGW integration via OpenConnector, MyDash for weekly reports to provincial executives.
UWV pilot
Document flow pilot: DocuDesk classifies and routes incoming mail, OpenConnector links to case system. Four weeks from pilot to production.
Adjacent specialists.
If Acato isn't the right fit for your sector or stack, these partners cover the gaps.
