Stijn Christiaens

Co-founder & Chief Data Citizen, Collibra at collibra

Reviewed Updated Aug 4, 2026

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Location Brussels, Belgium

Last Verified Investment Dalton (Pre-Seed) — Sep 5, 2025

Social @stichris LinkedIn

Stage Focus

pre-seed seed

Sector Focus

data-infrastructure enterprise ai saas developer-tools

Background

Stijn (“Stan”) Christiaens is the co-founder and Chief Data Citizen of Collibra, the data intelligence company he helped spin out of Vrije Universiteit Brussel’s STARLab in 2008 ¹. Prior to Collibra, Christiaens was a senior researcher at STARLab focused on applied semantics, and he holds a Master’s in Information Technology from KU Leuven and a Postgraduate in Industrial Corporate Governance from Europese Hogeschool Brussel ¹. Over Collibra’s history he has held roles including COO (pre-sales, post-sales, partnerships) and CTO (product, roadmap, UX, research), and today serves as Chief Data Citizen, focused on customer-facing thought leadership and community ¹².

Christiaens is based in the Brussels region and is a recurring speaker at data-industry events including the CDOIQ European Symposium and FirstMark’s Data Driven ²³. He also serves on the board of Debateville, a Belgian afterschool debating program ⁴.

He invests personally, alongside his Collibra role, in early-stage European (predominantly Belgian) data and SaaS startups. He is a limited partner in Syndicate One, a Belgian founder-and-operator syndicate that closed a €6.5M debut fund in 2024 and a €22M second fund in early 2026 ⁵⁶.

Stated Thesis

Christiaens has not published a formal angel-investing thesis. In interviews and podcasts he speaks primarily about data governance and enterprise data practice rather than about his angel portfolio. On working with data teams and their tooling, he has argued that trust is the binding constraint: “If people don’t trust it, if there is no cornerstone of trust…then the catalog initiative is typically not going to be sustainable” ⁷. On execution, he has told practitioners to “first of all do it…make it practical, make it about not talking but about rolling up the sleeves” ⁷.

His participation in Syndicate One aligns with that fund’s stated focus on backing “exceptional Belgian entrepreneurs, wherever they are in the world” at early stages across deeptech, fintech, and SaaS ⁶.

Inferred Thesis

Based on 4 independently verified angel investments (Tinybird, NannyML, Otamiser, Dalton) plus LP participation in Syndicate One’s Fund I and Fund II. Sample size is small; percentages are not meaningful and are described qualitatively.

Sector concentration: Every verified deal is in data infrastructure, developer-facing enterprise SaaS, or applied AI — the categories Christiaens knows deepest from Collibra. Tinybird is real-time analytics infrastructure ⁸; NannyML is post-deployment ML monitoring ⁹; Dalton is AI-driven website optimisation ¹⁰. The outlier is Otamiser, a hospitality-ranking SaaS out of Ghent ¹¹ — still B2B SaaS, but consumer-adjacent.

Stage: All four verified deals are pre-seed or seed rounds, typically alongside a lead European seed fund (Crane Venture Partners on Tinybird ⁸; Volta Ventures with Lunar Ventures on NannyML ⁹; Pitchdrive on Otamiser ¹¹; Syndicate One on Dalton ¹⁰).

Geography: Three of four verified companies are Belgian (NannyML from Leuven, Otamiser and Dalton from Ghent). Tinybird is the exception (Madrid/US). This concentration is reinforced by his Syndicate One LP position, which is explicitly a Belgium-first vehicle.

Co-investor patterns: Christiaens repeatedly appears alongside a tight Belgian founder-angel cluster including Matthias Geeroms (Lighthouse), Jorn Vanysacker and Gilles Mattelin (Henchman), Louis Jonckheere (Wintercircus, ex-Showpad), Roeland Delrue (Aikido Security), and Christophe Morbee — most visibly on Dalton ¹⁰ and via Syndicate One ⁵⁶. On Tinybird he syndicated with US operator-angels including Nat Friedman, Guillermo Rauch, Jason Warner, and Matias Woloski ⁸.

Founder profile: Verified deals back technical founders building infrastructure or vertical B2B SaaS. NannyML’s team came out of an ML consultancy ⁹; Tinybird was founded by ex-Carto engineers building on ClickHouse ⁸; Dalton was founded in 2024 by Vincent Declercq and Ward Van Laer ¹⁰.

Check size: Not disclosed. Deals are typically angel-syndicate allocations within €1M–$3M rounds; individual check size is not published.

Total activity: CB Insights reports 8 angel investments dated July 2021–September 2025, and one exit (NannyML acquired by Soda, June 2025) ¹²¹³. Only 4 have publicly identifiable companies from primary press sources; the remainder are behind aggregator paywalls and are excluded from the portfolio table below rather than guessed.

Portfolio

Company	Year	Stage	Source
Tinybird	2021	Seed ($3M, led by Crane Venture Partners)	⁸
NannyML	2020	Pre-Seed (€1.06M, led by Volta Ventures)	⁹
Otamiser	2024	Seed ($3M, led by Pitchdrive)	¹¹
Dalton	2025	Pre-Seed (€1M, incl. Syndicate One)	¹⁰

Also: LP in Syndicate One Fund I (€6.5M, 2024) ⁵ and Fund II (€22M, 2026) ⁶.

In Their Own Words

On trust as the foundation of any data-governance rollout:

“If people don’t trust it, if there is no cornerstone of trust…then the catalog initiative is typically not going to be sustainable.” — Stijn Christiaens, Data Engineering Podcast, episode on Collibra ⁷

On execution style for data teams:

“First of all do it…make it practical, make it about not talking but about rolling up the sleeves.” — Stijn Christiaens, Data Engineering Podcast ⁷

What Founders Say

No independently sourced founder testimonials found specifically about Stijn Christiaens’s angel-investor role. (Portfolio companies’ public announcements list him among investors but do not include founder quotes attributed to him personally.)