Building now

I build companies, software, communities and occasionally houses.

Twenty-odd years in, mostly SaaS. This is what’s on the table today.

Substrat

Building

Infrastructure for modern B2B SaaS and AI.

The question we’re working on: how does a SaaS product safely handle identity, nested tenancy, permissions, audit and GDPR once AI starts doing more than answering questions?

Co-founder with Markus Ahlstrand — product, thesis, customer discovery and the commercial side.

substrat.net npm · @substrat-run GitHub (link pending)Essay coming: AI Readiness Isn’t About AI

Anchor

Experiment

A product I’m experimenting with for complex family situations.

It helps people put structure on information scattered across messages, documents, events and timelines — and uses AI carefully to find and make sense of it. It doesn’t judge anyone or decide who’s right.

Live prototype Essay coming: When Your Family Life Becomes Evidence

Caterbee

Company

Catering, rethought. We connect companies and private customers directly with chefs and caterers — better food, less friction, fairer economics for the people actually cooking.

An ongoing business: past 3M EUR in turnover, with a growing chef network across Sweden.

Co-founder.

The Pool

Company

A members’ community in Marbella for people working with technology, capital and companies.

Co-founder & Partner.

thepool.es The storyEssay coming: Seven Years in Marbella: Building a Life, Not Moving to the Sun

Future of Commerce

Live

A gathering for founders, CMOs and operators — three days of talks, roundtables and unstructured conversation. Density over scale.

Ran three years in a row with real revenue and roughly 100 people in the room each time.

Co-founder.

Villa Celina in Los Arqueros, Benahavís — entrance facade
Occasionally houses

Villa Celina, Los Arqueros

I bought the plot and spent several years building the house in Los Arqueros, Benahavís — with Consjumo, architect Juanma Sayago and Jonna Högnäs on the interiors.

Experiments

I build a lot of things. Most won’t become companies. That’s the point.

Anchor

Experiment

Structures scattered family information into one timeline you can search.

martinwettergren.com

Live

This site. Built and edited mostly by talking to it.

Writing about it

  • AI Readiness Isn’t About AI

    My developing thesis on AI, SaaS infrastructure and why we’re experimenting with Substrat.

    Coming soon
  • When Your Family Life Becomes Evidence

    The story behind why I started thinking about Anchor.

    Coming soon
  • What I Learned Building a House in Marbella

    Buying a plot and building Villa Celina in Los Arqueros.

    Coming soon
  • Seven Years in Marbella: Building a Life, Not Moving to the Sun

    What living and building here teaches you that visiting doesn’t.

    Coming soon
Earlier companies are under previous work.