Amsterdam's HousApp raises €4.3 million Seed to automate the admin layer of real estate transactions

HousApp, an Amsterdam-based proptech, has raised a €4.3 million Seed round co-led by Arches Capital and Antler, with angel investors participating alongside. The company, founded in 2025 by Sebastiaan Kloppenborg and Willem Kolff, builds an AI-native platform designed to take the administrative overhead out of the real estate transaction — scheduling viewings, generating and tracking documents, managing signatures and coordinating the timeline of dependencies that run from listing to completion.

The paperwork problem in property

By the time a Dutch residential property changes hands, the agent handling the transaction has typically managed a dozen or more distinct administrative tasks: coordinating multiple viewings, generating offer documentation, chasing responses, updating all parties on a moving timeline. Most of this is still done manually, task by task, across a fragmented set of tools. HousApp's bet is that the entire administrative layer is automatable — and that freeing agents from it is worth paying for.

The proof point is already live: more than 2,200 Dutch real estate agents are active users of the platform, a number that is notable for a company barely a year old. At the start of 2026, HousApp also acquired Friva, a move that suggests the company is building user base through consolidation as well as organic growth rather than relying on new signups alone.

What €4.3 million is for

The Seed goes to three places: accelerating product development, hiring senior engineering talent to extend the platform's capabilities, and deepening penetration in the Dutch market before a push into adjacent geographies. The co-lead structure — a sector-specialist in Arches Capital and a builder-first fund in Antler — gives HousApp both industry pattern-recognition and a network built for the early stage.

The Dutch market provides a useful laboratory: high transaction velocity, a relatively digitalised professional environment, and agents accustomed to competing on service rather than just stock. Whether the administrative pain HousApp addresses travels faithfully to markets with different regulatory frameworks and brokerage models — Germany, the UK, France — is the expansion question the round is designed to begin testing.