Working notes and practical tools.
63 essays on EU AI Act compliance, DSGVO, building SaaS in DACH, topical-authority SEO, and founder operations — plus free tools we've built for SMEs and other builders.
Pillar guides.
The EU AI Act in 2026: A complete guide for SMEs
A practical, SME-focused guide to the EU AI Act as it enters full enforcement in August 2026. Risk classification, Article 4, penalties, timelines.
GDPR vs Swiss DSG: Where they diverge
The revised Swiss FADP looks like GDPR but differs in important practical ways. A comparison for DACH-focused businesses.
Building a DACH SaaS in 2026: The stack and the playbook
The opinionated stack behind the Innopulse portfolio — Next.js, Supabase, Stripe, Vercel, Resend — and why it compounds.
Topical authority for DACH SaaS: The complete framework
The pillar-cluster topical authority system behind our portfolio. Why it compounds, how to structure it, and what to ship weekly.
Identity over discipline: The principle behind the portfolio
An excerpt from "Identity Over Discipline" — the ENGINE Method applied to building a nine-product SaaS portfolio.
Retrieval-Augmented Generation (RAG): A Practical Engineering Guide
RAG beyond the hello-world. Chunking strategy, embedding choice, hybrid search, re-ranking, and the evaluation harness that tells you whether it actually works.
AI Features and DSGVO: Lawful Processing When an LLM Touches Personal Data
The compliance layer under every AI feature. Legal basis, Article 22 automated decisions, subprocessor disclosure, and keeping personal data out of training.
Recently published.
Programmatic SEO for DACH markets
City pages, category pages, comparison pages — the programmatic SEO patterns that rank in German-language search.
Retrieval-Augmented Generation (RAG): A Practical Engineering Guide
RAG beyond the hello-world. Chunking strategy, embedding choice, hybrid search, re-ranking, and the evaluation harness that tells you whether it actually works.
AI Cost Management: Keeping LLM Spend Predictable in SaaS
Token economics for product teams. Prompt budgets, caching, model tiering, and the per-workspace metering that keeps an AI feature from eating your margin.
Prompt Engineering for Products (Not Demos)
Production prompting is software. Versioning, testing, structured output, injection defence, and why your system prompt belongs in source control with a changelog.
Evaluating LLM Features: Testing What Doesn't Have a Right Answer
You cannot ship AI you cannot measure. Building eval sets, LLM-as-judge, regression gates in CI, and human review loops for product-grade quality.
pgvector vs. Dedicated Vector Databases: Choosing for SaaS Scale
When Postgres pgvector is enough and when you need Pinecone, Qdrant, or Weaviate. Index types, scaling limits, and the operational cost of a second datastore.
AI Agents in a SaaS Product: Where They Help and Where They Hurt
Agentic features beyond the hype. Tool-use design, the autonomy spectrum, human-in-the-loop checkpoints, and why most useful agents are narrow, not general.
Claude API vs. OpenAI for EU SaaS: Data Residency and Practical Tradeoffs
Choosing an LLM provider for a DACH product: data processing terms, EU residency, model strengths, and the abstraction layer that lets you switch without a rewrite.
Supabase for EU data residency: The Frankfurt playbook
Why we default all portfolio products to Supabase EU Frankfurt, the DSGVO posture it gives us, and the caveats.
Tools we've built for builders and SMEs.
Free calculators, self-checks, and reference tools drawn from our own SaaS portfolio. No email wall, no upsell funnel.
EU AI Act Quick-Check
Five-minute classification of your AI system under the AI Act risk framework. Outputs an indicative tier and next steps.
AI Act Article 4 Literacy Guide
What Article 4 actually requires, who it applies to, and how to document AI literacy training for your team — in plain language.
Subscription Cost Calculator
Jahreskosten-Rechner: enter your subscriptions, see your annual spend, identify overlap and waste.
DSGVO Readiness Self-Check
Eight-question SME self-check for GDPR/DSG posture. Highlights gaps that usually fail audits.
SaaS Stack Cost Calculator
MRR + team size + product type → realistic monthly infrastructure cost for a Swiss-ready SaaS.
Cancellation Letter Generator
Swiss and DACH-compliant Kündigungsvorlagen library. Pick your provider, generate a legally valid letter.