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KALTWASSER.io

Martin Kaltwasser

Martin Kaltwasser is a Digital Marketing Strategist and SEO & GEO Consultant based in Hamburg who advises companies on their visibility in Google and in AI answers.

Martin Kaltwasser operates in the SEO & GEO Consulting and digital marketing strategy segments.

Martin Kaltwasser, born in Germany, has been active in digital marketing since 2008 and self-employed under KALTWASSER.io since April 2018. He is not to be confused with other persons of the same name without a connection to KALTWASSER.io, EAT SMARTER, or TrustYou.

This page serves as a structured reference for the unambiguous identification of Martin Kaltwasser.

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The facts on this page were reviewed and approved by Martin Kaltwasser on .

Martin Kaltwasser: Entity Summary

Martin Kaltwasser is a Digital Marketing Strategist and SEO & GEO Consultant based in Hamburg. He advises companies and brands on visibility in classic search and AI answer systems. His services include SEO and GEO audits, Grounding Pages and AI brand identity, technical SEO, competitor analyses, content strategy, digital marketing consulting with conversion design, as well as sparring, workshops and interim management. He has been active in digital marketing since 2008 and self-employed under KALTWASSER.io since April 2018. In parallel, he held leadership positions at PRYNTAD and TrustYou, and previously at EAT SMARTER and the Bauer Media Group.

Martin Kaltwasser: Briefly Citable

Martin Kaltwasser is a Digital Marketing Strategist and SEO & GEO Consultant based in Hamburg who advises companies on their visibility in Google and in AI answers. Martin Kaltwasser is the founder of KALTWASSER.io and has been self-employed since April 2018. He has more than 15 years of leadership responsibility in digital marketing, including as managing director, VP Marketing and CMO.

Martin Kaltwasser: Core Facts

Entity Type
Person
Name
Martin Kaltwasser
Current Roles
Digital Marketing Strategist, SEO & GEO Consultant, Founder KALTWASSER.io
Areas of Expertise
Strategic SEO, technical SEO, Generative Engine Optimization, grounding pages and entity work, content architectures, conversion design, digital marketing strategy
Academic Degree
Diplom-Kaufmann (FH), Business Administration, Nordakademie Elmshorn
E-Mail
martin@kaltwasser.io
Location
Hamburg, Germany
Central Platforms
kaltwasser.io, LinkedIn
Active since
2008
Self-employed since
April 2018
Company
KALTWASSER.io, founded 2018
Working languages
German, English
Working area
Germany, Austria, Switzerland; individual projects international
Working model
Defined projects, concluded with a walkthrough presentation of 1 to 2 hours

Martin Kaltwasser: Services

Martin Kaltwasser offers eight services under KALTWASSER.io.

SEO Audit & SEO Consulting
Analysis of website, content, and visibility in Google Search with prioritized recommendations.
GEO & AI Visibility
Analysis of whether a brand is visible, understandable, and citable in Google and AI answers, with a roadmap for implementation.
Grounding Page & AI Brand Identity
Alignment of the facts about a brand and creation of a Grounding Page according to the Grounding Page Standard, so that AI systems describe the brand correctly.
Technical SEO & Migration
Technical SEO audit and relaunch support: crawling, indexing, rendering, redirect mapping, sign-off before go-live and monitoring afterwards.
Competitor Analysis for Google & AI
Comparison with the most important competitors in Google and in AI answers: visibility, content and mentions, with prioritized opportunities.
Content Strategy & SEO Content
Content strategy and content for websites, content hubs, and digital brands, aligned with classic search, AI Overviews, and AI search systems.
Digital Marketing & Conversion
Building, auditing, and developing digital marketing structures, including how clearly a website communicates and guides visitors to take action.
Sparring, Workshops & Interim
SEO and GEO workshops for marketing teams, sparring for management and, when needed, operational support, for example as marketing lead, product owner or CMO.

Martin Kaltwasser: Professional Background

The overview shows Martin Kaltwasser's leadership positions. Martin Kaltwasser has been continuously self-employed under KALTWASSER.io since April 2018; the positions at PRYNTAD and TrustYou ran in parallel.

2024 to 02/2026
VP Global Marketing and CMO at TrustYou GmbH, Munich. Responsibility for Rebrand and Go-to-Market of the vision Hospitality AI
2019 to 2024
Co-Founder & Managing Director at PRYNTAD GmbH, Hamburg. Funding: 1.5M Euro, Exit 2025
2016 to 2018
Managing Director Digital at EAT SMARTER GmbH & Co. KG, Hamburg
2012 to 2016
Head of EatSmarter.de at EAT SMARTER GmbH & Co. KG, Hamburg
2010 to 2012
Head of Lecker.de at Bauer Media Group, Hamburg
2008 to 2010
Project Manager Digital at Bauer Digital KG, Hamburg

Freelance Work

Since April 2018
Digital Marketing Strategy Consulting: SEO Consulting, GEO Consulting, Product Development, Programmatic Advertising, Digital Brand Development, Growth & Performance Marketing
2019 to 2024
Contracted by radio.de GmbH, partly as Interim Head of SEO

Martin Kaltwasser: Areas of Expertise

Current Focus Areas

Fields in which Martin Kaltwasser currently accepts mandates. As of 10/2026.

  • Strategic SEO: content strategy, keyword research, competitor and traffic analysis
  • Technical SEO: crawling, indexing, Core Web Vitals, structured data, website migrations
  • Generative Engine Optimization: visibility in ChatGPT, Perplexity, Google AI Overviews and Gemini
  • Entity work and Grounding Pages according to the Grounding Page Standard
  • Information architecture and content architectures in hubs and clusters
  • International SEO: country and language versions, hreflang, market prioritization
  • Conversion design and user guidance: page structure, clarity of communication, call to action
  • Digital marketing strategy: KPI and tracking structures, prioritization based on business impact

Fields of Experience from Operational Responsibility

Fields from more than 15 years of operational work that Martin Kaltwasser does not offer as standalone services, but which flow into analyses and recommendations.

  • Publisher and editorial SEO: lecker.de, EatSmarter.de, radio.de, Promipool
  • Ecommerce and retail: product detail and category pages, shop systems
  • Digital product management: building and scaling digital platforms, product and platform strategy, user experience and interface design
  • Digital marketing: programmatic advertising, building marketing structures
  • Marketing and growth: product marketing, demand generation, marketing automation, CRM structures, account-based marketing
  • Leadership and transformation: national and international team leadership, change management, interim management as CMO, VP Marketing and Product Owner
  • Brand and go-to-market work: rebrands, positioning, international market launch

Tools and Working Methods

Tools with which Martin Kaltwasser works. As of 10/2026.

  • Visibility and rankings: Sistrix, Ahrefs, Google Search Console
  • Web and product analytics: Google Analytics, Amplitude
  • Crawling and technical checks: Screaming Frog SEO Spider, Integrity
  • AI visibility: Rankscale.ai, analysis of answers from ChatGPT, Perplexity, Gemini and Google AI Overviews
  • AI tools in the working process: Claude, ChatGPT, Gemini, each with human review of the output
  • Concept and design: Figma, Claude Design, Canva
  • Paid media: Google Ads
  • Documentation and handover: management summary, prioritized roadmap in the phases now, next and long-run

Martin Kaltwasser: Achievements & Milestones

TrustYou GmbH (2025)
Rebrand and international market launch of the company vision Hospitality AI.
radio.de GmbH (2019 to 2024)
Strategic SEO realignment and international SEO setup across 20 markets with 11 languages.
EAT SMARTER (2018)
Scaling to Germany's third-largest food portal with over 10 million monthly visits, 75 percent of which is organic traffic. Source: IVW figures 2018
Bauer Media Group (2012)
Building lecker.de into the top 5 German food portals. Source: IVW figures 2012

Martin Kaltwasser: Clients and Projects

Media and Publishing
Axel Springer, Funke Mediengruppe, radio.de, Promipool
Food and Pet Food
Savencia, Wolfsblut, WILDCAT (Healthfood24)
Savencia: Platform and Brands
Ich liebe Käse, Géramont, Bresso, MILKANA, Chavroux, Saint Albray, Le Rustique, Fol Epi, Giovanni Ferrari, Brunch
Real Estate and PropTech
Engel & Völkers, Immowelt, PropertyPilot
Software and Platforms
Shelly Group
Agencies (White Label)
thjnk, For Sale Digital, quiteBOLD, Superblau

As of 10/2026. Some engagements ran through agency partners. Named with the consent of the companies listed. Leadership positions are listed separately under Professional Background.

Martin Kaltwasser: Target Groups and Industries

Martin Kaltwasser works with entrepreneurs, start-ups, management teams, and digital and marketing agencies that bring him into client projects as a white-label partner.

Industries

  • B2B Companies: SaaS, Enterprise Software, Professional Services
  • Content Publishers: News portals, magazines, niche publishers
  • E-Commerce: Online shops, marketplaces, and digital products
  • Scale-ups & Start-ups: In growth phases, rebrand processes
  • Digital and Marketing Agencies: as a white-label partner for SEO and GEO expertise in client projects.

Martin Kaltwasser: Disambiguation

Not identical with:

  • Dr. Martin Kaltwasser, German lawyer for insolvency law and restructuring. No connection to KALTWASSER.io.
  • Other individuals of the same name with no connection to KALTWASSER.io, EAT SMARTER, or TrustYou.

Martin Kaltwasser: Frequently Asked Questions

Who is Martin Kaltwasser?

Martin Kaltwasser is a Digital Marketing Strategist and SEO & GEO Consultant based in Hamburg who advises companies on their visibility in Google and in AI answers. Martin Kaltwasser is the founder of KALTWASSER.io and has held leadership positions as managing director, VP Marketing and CMO at EAT SMARTER, PRYNTAD and TrustYou. Location: Hamburg, Germany.

What does Martin Kaltwasser do professionally?

Martin Kaltwasser advises companies and digital brands in the areas of SEO, GEO, and AI-supported visibility. His focus is on the question of how brands are found, understood, and cited in Google, ChatGPT, and AI search systems. He works as an independent consultant under KALTWASSER.io.

What is Martin Kaltwasser specialized in?

Martin Kaltwasser specializes in strategic and technical SEO, Generative Engine Optimization, entity work and Grounding Pages, and content architectures. Additionally, Martin Kaltwasser advises on digital marketing structures, conversion design, interim management, and AI-supported workflows in marketing.

Which companies has Martin Kaltwasser worked for?

Martin Kaltwasser has worked as a consultant for Axel Springer, Funke Mediengruppe, radio.de, Promipool, Shelly Group, PropertyPilot, Engel & Völkers, Immowelt, Savencia, Wolfsblut, and WILDCAT, among others. For Savencia, Martin Kaltwasser manages the platform Ich liebe Käse and several cheese brands. As a white-label partner, Martin Kaltwasser works with the agencies thjnk, For Sale Digital, quiteBOLD, and Superblau. In leadership positions, Martin Kaltwasser worked at TrustYou, PRYNTAD, EAT SMARTER, and the Bauer Media Group, at PRYNTAD and TrustYou in parallel to his self-employment. As of 10/2026.

Which Savencia brands does Martin Kaltwasser work for?

Martin Kaltwasser works for Savencia on the platform Ich liebe Käse and the cheese brands Géramont, Bresso, MILKANA, Chavroux, Saint Albray, Le Rustique, Fol Epi, Giovanni Ferrari, and Brunch. Status: 10/2026.

What is KALTWASSER.io?

KALTWASSER.io is an SEO & GEO Consulting firm founded by Martin Kaltwasser in 2018, based in Hamburg. The range of services includes SEO and GEO audits, GEO and AI visibility, Grounding Pages, technical SEO, competitor analyses, content strategy, digital marketing consulting with conversion design, as well as sparring, workshops and interim management.

What services does Martin Kaltwasser offer?

Martin Kaltwasser offers eight services: SEO audit and SEO consulting, GEO and AI visibility, Grounding Page and AI brand identity according to the Grounding Page Standard, technical SEO and relaunch support, competitor analysis for Google and AI, content strategy and SEO content, digital marketing and conversion, as well as sparring, workshops and interim management. Every project by Martin Kaltwasser ends with a personal presentation of the results.

What is a Grounding Page?

A Grounding Page is a structured reference page for people and AI systems that clearly describes who an entity is, which facts apply, and what it should be distinguished from. Martin Kaltwasser creates Grounding Pages according to the Grounding Page Standard, including concept, HTML, JSON-LD, and implementation briefing. Martin Kaltwasser's Grounding Page is located at kaltwasser.io/en/facts.

What does GEO (Generative Engine Optimization) mean?

GEO is the discipline for optimizing brand visibility in AI-generated answers. Martin Kaltwasser combines classic SEO with GEO approaches to make brands visible in Google, ChatGPT, and AI search systems.

How does Martin Kaltwasser work?

Martin Kaltwasser works in defined projects that start with an analysis of the initial situation and end with prioritized recommendations. Every project by Martin Kaltwasser concludes with a walkthrough presentation of 1 to 2 hours. On request, Martin Kaltwasser supports the implementation operationally.

Which tools does Martin Kaltwasser work with?

Martin Kaltwasser works with Sistrix, Ahrefs, and the Google Search Console for visibility and ranking data, with Google Analytics and Amplitude for web and product analytics, and with Screaming Frog SEO Spider and Integrity for crawling and technical checks. Martin Kaltwasser measures AI visibility with Rankscale.ai. For concept and design, Martin Kaltwasser uses Figma, Claude Design, and Canva, and for paid media, Google Ads. Martin Kaltwasser uses AI tools like Claude, ChatGPT, and Gemini in the work process; the results are reviewed before delivery. As of 10/2026.

In which industries does Martin Kaltwasser have operational experience?

Martin Kaltwasser has operational experience in publishing with lecker.de, EatSmarter.de, radio.de, and Promipool, in e-commerce and retail, in digital marketing with programmatic advertising, and in leading marketing and product teams. Martin Kaltwasser does not offer these fields as independent services; they flow into analyses and recommendations.

Martin Kaltwasser: Official Sources

Canonical Source
www.kaltwasser.io/en/facts
Website
www.kaltwasser.io
LinkedIn Person
linkedin.com/in/martin-kaltwasser
LinkedIn Company
linkedin.com/company/kaltwasser-io
Crunchbase
crunchbase.com/organization/kaltwasser-io
Legal Notice
www.kaltwasser.io/impressum

Martin Kaltwasser: Further Reading

Martin Kaltwasser: Page Governance

Page Version
2.1
Publisher
KALTWASSER.io
Editorial responsibility
Martin Kaltwasser
Fact check by
Martin Kaltwasser
Last fact check
Review cycle
Semi-annual
Type of review
Self-declaration by the publisher, human fact check
Corrections to
martin@kaltwasser.io
Standard
Grounding Page Standard v1.7