SUNZINET GmbH

SUNZINET is a full-service digital agency founded over 25 years ago, based in Cologne, Germany, with 160 employees across offices in Germany, Poland, and a third unspecified country. The company works across digital strategy, web development, e-commerce, CRM, marketing automation, and AI solutions for mid-market and enterprise clients. Revenue in 2024 was €15 million. SUNZINET ranked 9th among owner-managed agencies in Germany.

The leadership team includes Georges D.M. Wolff (Founder & CEO), Theresa Gruhler (CEO, formerly COO), Sebastian Spill (CTO), Daniel Palm (CMO), and Simona Ünal (CRO), with Adam Sieczkowski heading the Poland operation. All team members are TÜV-certified in AI & Data Policies for EU compliance.

Services and capabilities

SUNZINET organizes its offerings into several tracks. Digital Strategy covers strategy consulting, process consulting, AI consulting, and technology consulting. Web Development includes portals and platforms, CMS and headless solutions, individual applications, and cloud services.

Digital Marketing & Brand encompasses branding, lead generation, marketing automation, performance marketing, and SEO. CRM & Revenue Operations handles CRM consulting, marketing and sales automation, CRM system integration, and custom development. Data & AI covers AI consulting, knowledge management chatbots, AI search, and enterprise architecture. The company also delivers system integration and automation, interface development, e-commerce consulting, B2B commerce, online shops, and product information management (PIM).

Recent focus areas include accessibility compliance (mandatory in 2025 for many businesses under EU rules) and Revenue Operations platforms to align sales, marketing, and customer success functions.

Notable work

Bosch Digit: SUNZINET acted as Bosch's digital transformation partner, automating data exchange and task automation such as data transfer and contract creation, described as enabling "higher efficiency for a higher revenue."

Niedax Group: The company led a brand relaunch across Niedax Group and subsidiaries resulting in increased website traffic, improved SEO vitals, and social media growth.

AIFS: A 10-month website relaunch moving the organization to HubSpot for customer interactions, described by the AIFS team as delivering "a much more modern, appealing website that also convinces in terms of user experience."

Other clients with public testimonials include Bayer, Coeo, Rheinische Post Mediengruppe, Orthomol, Creditreform, WOFI Leuchten, BIM Berliner Immobilienmanagement, Art-Invest, Unger, Leguano, Gerolsteiner Brunnen, Friedwald, Simonswerk, and BPW. Work spans intranet modernization (often SharePoint Online-based), website redesigns, e-commerce platform launches, and marketing automation implementations.

How they work

SUNZINET structures client engagement around regular touchpoints: weekly interactions, monthly reporting, quarterly alignments, and annual discussions. Each client is assigned a dedicated Project Manager as the primary point of contact responsible for keeping projects on track, within budget, and on schedule. The company emphasizes measurable outcomes tied to KPIs and business growth objectives. Teams include solution architects and business consultants providing what the company describes as 360° support across interdisciplinary areas. Pricing is not disclosed on the website.

Team and credentials

SUNZINET has 160 employees. The founding team includes Georges D.M. Wolff, with Theresa Gruhler elevated to CEO in September 2024 (previously COO for eight years). Sebastian Spill leads the largest department as CTO with 15+ years of agency experience. All staff are TÜV-certified in AI & Data Policies for EU compliance. The company does not publicly list specific ISO, SOC 2, or HIPAA certifications, nor does it mention partnerships with major cloud platforms. Languages spoken are not specified, though the company serves German-speaking and Polish markets.