Venture Builder · Barcelona ·2026

Building
the next
generation
of founders.

— Estudio nº 04

Costa Brava / ES

Ventures built &
backed
0 +
Founders in the
network
0 +
Capital raised
0 M

I / VI — Practice

Three ways we partner.

Operators before investors. We build investment-ready startups. Capital, craft and conviction — in equal measure.

001

Venture
Building

Companies from first principles — teams, product, brand, capital.

002

Investment

Patient capital from pre-seed to Series A.

003

Investor Network

Matching investors Club Deals Opportunities Revision

II / VI — Thesis

We back founders building companies that shape tomorrow.

Sectors

Applied AI · Climate · Consumer · Fintech

Stage

Pre-seed & Seed. Selective Series A.

Geography

Iberia, Europe, select US.

III / VI — Portfolio

Selected work.

Climate · 2024

— 01

Marea

Ocean-grade carbon removal infrastructure.

Design tools · 2023

— 02

Forma studio

A canvas for the next generation of product teams.

Future of work · 2022

— 03

Estudio Nova

Workspaces designed for distributed craft.

Consumer · 2024

— 04

Inmo Project

Eco Hose building project

IV / VI — Studio

Operators.
Designers.
Believers.

Former founders and product leaders, shaped by the cities we love.

Mateo Riera

Founding Partner

Silvia Vidal

Partner, Investments

Andreu Sala

Partner, Studio

V / VI — Journal

Field notes.

Essay · 12 min

The next decade of European venture will be built quietly.

Memo

2026 focus areas.

Studio

Prototyping companies in 90 days.

Interview

In conversation with Marea.

V / VI — Contact

Let’s build something
meaningful.