# Diederik Ingen Housz > Diederik Ingen Housz is a Series A investor at VentureBuilders backing Apps and SaaS. See 4 investments, check sizes, portfolio. Updated Aug 2026. - Type: Angel Investor - Fund: [VentureBuilders](https://shizune.co/investors/profile/venturebuilders) - Total investments: 4 - Last investment: Jan 2026 - Lead investor: 50% - Last updated: Aug 2026 - LinkedIn: https://www.linkedin.com/in/diederik-ingen-housz-68b6108 Diederik Ingen Housz is a Series A investor at VentureBuilders focused on Apps and SaaS. Extensive experience in M&A (seed, VC and PE) and MBI transactions. Previously worked as a tax lawyer for Loyens & Loeff N.V. in Amsterdam and London. Holds a LL.M. from the University of Amsterdam and is a member of the International Bar Association (IBA). Diederik serves, amongst others, as a mentor of Rockstart (rockstart.com) andexecutive director on the board of Dealroom.co B.V., an online platform for tech companies and investors (dealroom.co). ## Investment focus ### Industry | Industry | Investments | Share | | --- | --- | --- | | Apps | 1 | 25% | | SaaS | 1 | 25% | | Database | 1 | 25% | | Software | 1 | 25% | | Agentic AI | 1 | 25% | 10 industries tracked in total. ### Stage | Stage | Investments | Share | | --- | --- | --- | | Series A | 1 | 25% | | Funding Round | 1 | 25% | | Venture - Series Unknown | 1 | 25% | ### Country | Country | Investments | Share | | --- | --- | --- | | Austria | 1 | 25% | | United Kingdom | 1 | 25% | ## Investments | Company | Description | Amount | Stage | Date | Website | | --- | --- | --- | --- | --- | --- | | Dealroom.co | Dealroom.co serves as a platform that facilitates connections between new investors and technology companies, allowing them to exchange data. The platform functions across all stages of investment, ranging from seed-stage to late growth-stage.Dealroom.co empowers investors to monitor the progress of companies and determine the optimal timing fortheir investments. Entrepreneurs can manage investment interests and utilize Dealroom.co as their primary channel for disseminating information to prospective investors. | $6.9M | Venture - Series Unknown | Jan 28, 2026 | | | iDWELL | iDWELL (www.idwell.com) is a revolutionary CRM cloud software and tenant app, especially designed for the next generation of real estate management. It enables the automation of routine processes, and bundles as well as optimizes all communication between the stakeholders of a property, including service providers, asset managers, landlords,tenants and property managers. Currently, more than 750,000 apartment units are managed with the assistance of iDWELL.The iDWELL ticketing system and the connected tenant app automates routine maintenance tasks with regards to handling and reporting damages. This allows iDWELL customers to focus on more important and revenue-generating tasks. The iDWELL marketplace provides further opportunities to service tenants and landlords while generating revenue. | $10.9M | | Nov 04, 2024 | | | Dealroom.co | Dealroom.co serves as a platform that facilitates connections between new investors and technology companies, allowing them to exchange data. The platform functions across all stages of investment, ranging from seed-stage to late growth-stage.Dealroom.co empowers investors to monitor the progress of companies and determine the optimal timing fortheir investments. Entrepreneurs can manage investment interests and utilize Dealroom.co as their primary channel for disseminating information to prospective investors. | $6.8M | Series A | Dec 22, 2021 | | | Dealroom.co | Dealroom.co serves as a platform that facilitates connections between new investors and technology companies, allowing them to exchange data. The platform functions across all stages of investment, ranging from seed-stage to late growth-stage.Dealroom.co empowers investors to monitor the progress of companies and determine the optimal timing fortheir investments. Entrepreneurs can manage investment interests and utilize Dealroom.co as their primary channel for disseminating information to prospective investors. | $3M | Series A | Feb 12, 2020 | | 4 of 4 investments shown. ## Co-investors - [Shoe Investments](https://shizune.co/investors/profile/shoe-investments) — VC Fund, 3 deals together - [Beringea](https://shizune.co/investors/profile/beringea) — VC Fund, 2 deals together - [Wecken & Cie.](https://shizune.co/investors/profile/wecken-cie) — VC Fund, 2 deals together - [Flashpoint](https://shizune.co/investors/profile/flashpointvc) — VC Fund, 1 deal together - [Indico Capital Partners](https://shizune.co/investors/profile/indico-capital-partners) — VC Fund, 1 deal together - [Rabobank](https://shizune.co/investors/profile/rabobank) — VC Fund, 1 deal together ## About VentureBuilders VC Fund 3 contacts available at VentureBuilders. | Name | Title | Profile | | --- | --- | --- | | Diederik Ingen Housz | Partner | https://shizune.co/investors/profile/diederik-ingen-housz | | Paul Montagne | CEO, Founder and Partner | https://shizune.co/investors/profile/paul-montagne-3 | | Paul Montagne | CEO, Founder and Partner | https://shizune.co/investors/profile/paul-montagne | ## Similar investors ### Similar stage - [Antler](https://shizune.co/investors/profile/antler-be9c) — VC Fund - [Alumni Ventures](https://shizune.co/investors/profile/alumni-ventures-group) — VC Fund - [General Catalyst](https://shizune.co/investors/profile/general-catalyst-partners) — VC Fund ## FAQ ### What does Diederik Ingen Housz invest in? Diederik Ingen Housz invests primarily in Apps, SaaS and Database startups, most often at Series A and Funding Round stage. Most of the 4 investments tracked by Shizune back companies in Austria. The Investment Focus section breaks down every industry, stage and country in the portfolio. ### When did Diederik Ingen Housz last invest? The most recent investment recorded for Diederik Ingen Housz closed in Jan 2026. Shizune tracks 4 investments in total for this profile, including round sizes, stages and portfolio companies, all sourced from confirmed public funding rounds and refreshed monthly. ### Is Shizune's investor data accurate? Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Aug 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page. # About Shizune Shizune.co is an investor database. Core features: - 48,091 startup investors (angels, VCs, accelerators, and others) - Email, phone, LinkedIn (for intros), socials, and other contact data - Updated daily from public funding news - CSV and Excel export The User can access the full database FOR FREE after signing up: shizune.co