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SEO & GEO · BARCELONA & GERMANY

SEO & GEO:
total visibility
across every search engine

Google, Bing, ChatGPT, Perplexity, Gemini — your next customer is already searching. The question is whether they find you or your competition. 20 years of experience, proprietary technology and a team that lives and breathes SEO from Barcelona and Germany.

Free SEO + AI audit See results
300+

SEO projects

14+

Languages

98%

Retention

20+

Years experience

They trust our SEO

  • Iberostar
  • Alpecin
  • Master Regale
  • ZGONC
  • Zandergruppe
  • Holter

The landscape has changed

Your 2024 SEO strategy is already obsolete

40% of Gen Z searches now start on TikTok or ChatGPT, not Google. According to Gartner data, organic traffic from traditional search engines will drop 25% before 2027 due to AI-generated answers. Google's AI Overviews already appear in over 30% of commercial searches, pushing organic results further down. But here's the opportunity: companies optimizing for both classic SEO AND AI engines are capturing a market most agencies don't even understand. We understand it because we've spent two years building the tools to measure it. At ZDS we don't separate SEO and GEO — we integrate them into a unified strategy. Because Google and ChatGPT read the same content: the difference is how you optimize it for each one.

Our SEO & GEO services

One agency. Every search engine.
Every language. Every market.

Technical SEO audit

Full crawl with Screaming Frog and proprietary tools. Core Web Vitals, indexation, JS rendering, URL architecture, hreflang, canonicals, internal linking. Actionable report in 2 weeks with clear priorities and immediate quick wins.

Content strategy

Advanced keyword research, topic clusters, content calendars and writer briefings. Content that ranks on Google AND that LLMs cite as authoritative source. SEO + UX + conversion integrated from the first briefing.

Link building & Digital PR

High-quality backlinks through manual outreach, digital PR and guest posting in relevant media. No PBNs, no spam. Strategy differentiated by market: what works in Germany doesn't work in Spain. Over 150 campaigns executed in 14+ countries.

GEO — AI Optimization

Specific optimization for ChatGPT, Gemini, Perplexity and Claude. Monitoring with our AI Visibility Tracker. Structured data, entity optimization, content citability and brand mentions in AI responses.

International SEO

Native hreflang, not copied from a tutorial. Native teams in Spanish, German, English, French, Italian, Portuguese and more. We understand cultural differences, not just linguistic ones. A German site for Austria needs a different strategy than for Germany.

AI Visibility Tracking

Proprietary tool that monitors in real time how ChatGPT, Gemini and Perplexity mention your brand and your competitors. The only tracker on the market that crosses AI data with GSC, organic rankings and business metrics.

Technical SEO audit

The foundation: a technically impeccable site

A website can have the best content in the world, but if Google can't crawl, index or render it correctly, that content is invisible. And if AI can't parse your structure, it will never cite you as a source. Our technical audit goes far beyond running a Lighthouse check. We analyze the complete information architecture, rendering chain, crawl budget, server response times, hreflang coherence in multilingual sites, internal linking patterns and dozens more technical signals. The result: a 50-100 page report with every issue categorized by impact and effort, a prioritized implementation roadmap and a working session with your development team to explain every point.

Crawl & Indexation

Screaming Frog, Sitebulb, GSC and proprietary tools. Analysis of robots.txt, sitemap.xml, server responses, redirect chains, orphan pages and duplicate content.

Core Web Vitals

LCP, INP, CLS measured in field (CrUX) and lab. Image optimization, fonts, critical CSS, deferred JS and cache. We measure before and after.

JavaScript rendering

SPAs, JS frameworks, dynamic content — we verify what Googlebot sees vs. what users see. SSR, prerendering or hybrid solutions depending on your stack.

hreflang & International

Correct hreflang setup (HTML, HTTP headers, sitemap), x-default, cross-domain canonicals. hreflang errors are the #1 technical problem on multinational sites.

GEO — Generative Engine Optimization

Does your brand appear when someone asks ChatGPT?

GEO is not a trend — it's the future of online discovery. Over 200 million people use ChatGPT weekly. Perplexity processes millions of daily searches. Google integrates AI answers in over 30% of searches. But here's the problem: most SEO agencies don't even know how to measure AI visibility. They have no tools. They don't understand how LLMs work. And therefore, they can't optimize for them. We built the AI Visibility Tracker — probably the first tool on the market that monitors in real time how ChatGPT, Gemini and Perplexity mention your brand, your products and your competitors. Not with manual screenshots, but with automated queries, evolution history and alerts when mentions change. What do we optimize for GEO? Entity optimization (making LLMs understand who you are), advanced structured data (beyond basic Schema), content citability (format, structure, verifiable data that models prefer to cite), brand authority signals (mentions, quality backlinks, presence in sources LLMs consider reliable) and the synergy with classic SEO (a good Google result reinforces the probability of being cited by AI).

Proprietary technology

AI Visibility Tracker: measure what no one else can

Developed internally and tested with our own clients before offering it to the market. The AI Visibility Tracker is the missing piece in the modern SEO puzzle. You can't optimize what you can't measure. And until now, AI engine visibility was a black box. With our tracker, you can see exactly what ChatGPT says about your brand, how it compares you to competitors and how mentions evolve week by week.

Multi-LLM monitoring

ChatGPT, Gemini, Perplexity, Claude — we monitor all relevant models with daily automated queries.

Competitive benchmark

Compare your visibility with up to 10 competitors. See who wins on which topics and why.

Alerts and evolution

Mention history, evolution charts and automatic alerts when your brand gains or loses AI visibility.

GSC & Analytics integration

Cross AI data with Google Search Console, Amplitude and your business KPIs. Everything in one dashboard.

Our approach

Specialized SEO services

Content Strategy

Content in 2026 must serve three masters: the classic search engine (ranking), the user (converting) and AI (being cited as a reliable source). Most agencies optimize for one and forget the other two. Our content creation process starts with deep keyword research that goes beyond search volumes. We analyze the intent behind each query: informational, navigational, transactional? What type of content ranks for that query? How does AI answer that question? Is there a content gap we can exploit? From there we build topic clusters — not isolated pages, but content ecosystems where each piece reinforces the others. Pillar pages covering a topic in depth, cluster content targeting specific long-tails and supporting content that generates backlinks and mentions. Every piece of content carries rich structured data, strategic internal linking, entity optimization for LLMs and integrated CTAs that don't break the reading experience. We produce in Spanish, German, English, French, Italian, Portuguese and more — with native writers, not Google Translate.

Link Building

Backlinks remain one of the top 3 ranking factors on Google. But in 2026 they play a dual role: they're also signals that LLMs use to determine a source's authority. An article linked from Forbes, major media or a specialized industry outlet is more likely to be cited by ChatGPT. Our link building approach is 100% manual and customized per market. What works in Germany (regional newspaper collaborations, industry associations) is completely different from what works in Spain (digital media, vertical blogs, industry influencers) or in the UK (digital PR, data-driven stories, newsjacking). We execute over 150 link building campaigns per year across 14+ countries. Each campaign includes personalized outreach, linkable content creation (studies, infographics, free tools) and tracking of every link obtained with quality metrics (DR, traffic, topical relevance). We never buy directory junk links. Never use PBNs. Never send generic emails. Every link we earn is editorial, contextual and relevant to your business.

International SEO

Did you know that "Sanitärtechnik" in Germany, "fontanería" in Spain and "plumbing" in the UK have completely different search ecosystems? Volumes, competition, ranking sites, search intents — everything changes. Translating an SEO strategy is the most expensive mistake international companies make. We don't translate: we research each market separately, with native teams who understand cultural subtleties, local search patterns and the specific competitive landscape. Our team speaks Spanish, German, English, French, Italian, Portuguese, Catalan, Dutch and more. With offices in Barcelona and Herdecke (Germany), we have native presence in Europe's two most demanding markets. And with 14+ languages covered through our specialist network, we can scale your SEO to any market without losing quality. hreflang, cross-domain canonicals, GSC geotargeting, ccTLDs vs. subdirectories, per-market keyword research, local link building, native content... Everything international SEO needs, under one roof.

Case study

European-scale Digital PR for international hotel chain

Digital PR and brand building strategy across 8 European markets simultaneously. Campaigns with travel media, luxury magazines and tourism portals to position the brand as a reference in each market. Result: consolidated media presence and brand keywords with average ranking of 1.1.

International hotel chain

International hotel chain

+65%

Brand awareness

Increase in media mentions

8

Simultaneous markets

ES, DE, UK, FR, IT, NL, AT, CH

1.1

Avg. ranking brand KWs

Average position for brand keywords

+180%

Digital PR coverage

Articles in tier-1 travel media

Case study

Master Regale: from 4,000 to 14,000 clicks/year after relaunch

Technical SEO, migration and content strategy for a German B2B and B2C manufacturer.

Master Regale (B2B & B2C)

Master Regale (B2B & B2C)

+250%

Organic traffic

From 4,000 to 14,000 clicks/year

#1

SEO Visibility

In the German market, surpassing competitors

+65%

Media activity

Backlinks and mentions in industry press

0

Migration loss

Relaunch without losing a single ranking

Our difference

Typical SEO agency vs. ZDS

Typical SEO agency
ZDS: SEO + GEO + AI
Optimizes only for Google
Yes
Google + ChatGPT + Gemini + Perplexity + Bing
AI visibility tracking
Not available
Proprietary AI Visibility Tracker
Languages covered
1-3 languages
14+ languages with natives
Per-market link building
Same approach for all
Strategy differentiated by country
Proprietary technology
Resells SEMrush/Ahrefs
AI Visibility Tracker + ETIM Classifier + proprietary automations
Verifiable experience
2-5 years
20+ years, 300+ projects, 98% retention

Our process

Methodology proven in 300+ projects

01

Audit and diagnosis

Complete technical crawl, competitor analysis, keyword gap analysis, AI visibility check, backlink profile analysis. Report with clear priorities, quick wins and impact estimation. Duration: 2-3 weeks.

02

Strategy and roadmap

Roadmap for 6-12 months with KPIs, milestones and fixed budget. No surprises. Includes technical SEO + content + link building + GEO. Approved by your team before starting.

03

Execution and optimization

Technical implementation (we work with your dev team or handle it ourselves), content creation, link building campaigns, continuous GEO optimization. Dedicated team with direct PM, biweekly sprints and transparent monthly reporting.

04

Measurement and scaling

Real-time dashboard with GSC, AI Visibility and business metrics. Monthly review with your team. We adjust strategy based on real data, not assumptions. We scale what works, stop what doesn't.

Sector expertise

SEO specialized by sector

Every sector has its own SEO challenges. We know them because we've been working in them for years.

Plumbing, heating & electrical

Our DNA. The Zander Group is one of Germany's leading SHKE wholesalers. ETIM Classifier, B2B catalogs, technical data sheets — we speak your language.

Hotels & tourism

Iberostar, boutique chains, travel agencies. International SEO with link building campaigns in travel media across 8+ countries simultaneously.

Industrial B2B

Master Regale, ZGONC, manufacturers and distributors. Technical SEO for complex catalogs, product sheets with thousands of SKUs and faceted navigation.

E-commerce

Stores with 10,000+ products, platform migration (Magento, Shopify, PrestaShop), marketplace SEO, product feeds and shopping ads.

Cosmetics & health

Alpecin and personal care brands. Content that meets health regulations while ranking. Strategies with specialized influencers and bloggers.

SaaS & tech

Product-led SEO, documentation sites, comparison pages, feature pages. Content that educates and converts in competitive markets.

SEO & GEO FAQ

What people usually ask

Trafico estancado? Hablemos de SEO.

Analizamos tu sitio web y te decimos exactamente que hacer para crecer en Google. Sin compromiso.

Manuel Riveiro

Manuel Riveiro

Director — SEO & Technical Consulting

We reply within 24h.