About digital opua

We're a Swiss AI consultancy that builds — and brings exactly that hands-on experience into our advisory, workshops, and implementation oversight.

Mission

We bring productive AI into Swiss companies — pragmatic, privacy-compliant, and with the credibility of a firm that runs its own AI systems.

Our principle: advisory with an enabling duty. We believe good consulting makes clients more independent — not more dependent. Every workshop, every consulting engagement, every development project leaves behind the knowledge, structures, and confidence you need to continue without us. More in the blog →

Location

Walchwil, Zug — Switzerland. We work Switzerland-wide and across the DACH region, on-site or remote.

CHE-435.289.702

Sister Company

digital nalu GmbH — Marketing, strategy, and advisory. Same principle, different domain: guide clients into operational independence rather than keep them in agency dependency.

Tech Stack & Standards

Swiss Privacy

nDSG-compliant, EU AI Act, local models where useful (Ollama).

Hosting Switzerland/EU

Vercel Frankfurt, GCP europe-west6, Neon Postgres EU-central.

Open Source First

Open-source stacks wherever possible — no vendor lock-in for clients.

Team

Holger von Ellerts

Founder & Managing Director

Senior software engineer with 20+ years of experience in data analytics, AI systems, and product development. Lecturer for AI at Swiss universities (FHNW, HSLU et al.). Builds digital opua's own production AI systems — Mingly, DocMind, RAG-Wissen, Pruefstand, Nexbid.

LinkedIn

Ricarda von Ellerts

AI Automation & Workflows

Expert in AI-driven marketing automation and efficient workflows. Combines creative marketing expertise with modern technology to optimise processes and improve campaign outcomes.

Martin Sempf

Ethical Hacker

Experienced ethical hacker who proactively identifies digital vulnerabilities and strengthens IT security using modern methods.

Eveline

Ethics & Privacy

Ensures legal compliance and moral integrity in operations. Navigates complex data protection regulations and builds an ethical corporate culture.

Valerio Zaminga

Prompt Engineer

Experienced prompt engineer optimising AI systems with precise, creative inputs to deliver innovative results and measurable value.