# Eduard Klein

> What works. What doesn't. What's next.

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## Blog

- [AI SDR: I Built My Own Instead of Buying One. The Complete Blueprint](https://eduardklein.com/blog/built-own-ai-sdr/index.md): Every AI SDR page is written by someone selling seats. This is the other branch: what building your own costs, the seven components I run, and when you should buy instead.
- [AI Strategic Visibility: What I Saw When a $14 Billion Company Went Invisible](https://eduardklein.com/blog/ai-strategic-visibility/index.md): What Chegg's 99% market-cap collapse tells us about AI strategic visibility — and the 2026 framework I give every founder who calls me.
- [SaaS SEO 2026: 62% of Keywords Lost to AI Overviews](https://eduardklein.com/blog/saas-seo-2026/index.md): Discover how AI Overviews destroyed traditional SaaS SEO strategies. Analysis of 4,357 keywords reveals the new reality facing B2B companies in 2026.
- [GEO vs SEO: Why the old SEO model does not work in 2026](https://eduardklein.com/blog/geo-vs-seo/index.md): Discover why traditional SEO is evolving in 2026. Learn how AI and search behavior changes are transforming digital marketing strategies and what replaces the o

## Knowledge

- [AI SDR Tech Stack: The One I Actually Run](https://eduardklein.com/knowledge/ai-sdr-tech-stack-the-one-i-actually-run/index.md): A coding agent, a cloud database, somewhere to run agents, API or MCP data access, a warmup tool. The 5-part stack I run, plus the 2 things I left off.
- [Should I Build My Own AI SDR or Buy One? Why I Built](https://eduardklein.com/knowledge/ai-sdr-build-or-buy-why-i-built/index.md): Build it, but have somebody experienced build it. The third answer the vendor comparisons do not offer, the disqualifier, and the point where building stops.
- [AI SDR Hallucinations: How I Stop Them](https://eduardklein.com/knowledge/ai-sdr-hallucinations-how-i-stop-them/index.md): Put a second process over the output, and never let that second process depend on an LLM. The rule, the component I deliberately did not automate, and why.
- [How Much Does an AI SDR Cost? What I Actually Paid](https://eduardklein.com/knowledge/ai-sdr-cost-what-i-actually-paid/index.md): A simple AI SDR agent costs about $1,000 once. The framework underneath took me six to eight months. Why the $200-5,000 a month benchmark is the wrong one.
- [What Is an AI SDR? A Definition From Building One](https://eduardklein.com/knowledge/what-is-an-ai-sdr-after-building-one/index.md): An AI SDR is software that takes over top-of-funnel work a junior rep would do by hand. What separates it from a sequencer, and what I chose not to automate.
- [How Long to Build an AI SDR? Mine Took 8 Months](https://eduardklein.com/knowledge/how-long-to-build-an-ai-sdr-mine-took-months/index.md): A few weeks on top of an existing framework. From a blank page, 6 to 8 months. Mine took 8, with 3 years of prior agent experience behind it.
- [Do AI SDRs Actually Work? Where Mine Failed](https://eduardklein.com/knowledge/do-ai-sdrs-work-where-mine-failed/index.md): Yes, with a human in the loop. Mine have run daily since 2023. The failure modes I hit myself, the reasons pilots die, and the point where building stops.
- [AI SDR Maintenance: What It Costs After Launch](https://eduardklein.com/knowledge/ai-sdr-maintenance-what-it-costs-after-launch/index.md): It is permanently under development, and that is the point. What actually needs maintaining, what CRM integration costs, and how to stay portable.
- [Can Someone Hijack Your AI SDR With a Web Page? How I Handle It](https://eduardklein.com/knowledge/ai-sdr-prompt-injection-how-i-handle-it/index.md): Yes, if the agent reads the open web while holding anything valuable. The sandbox and credential-broker architecture I actually run, and the two rules under it.

## Pages

- [AI Business Strategy Coaching — 1:1 Advisory for Executives](https://eduardklein.com/coaching/index.md): 1:1 AI business strategy coaching with Eduard Klein — where AI creates leverage, what to build vs. buy, and the strategic decisions your team can't make alone.
- [About Me](https://eduardklein.com/about/index.md): Eduard Klein — AI business strategist and tech consultant. 30 years building software. 30 years running businesses. Both sides of the table.
- [Eduard Klein's Weekly AI Briefing](https://eduardklein.com/briefing/index.md): One weekly email for founders and executives: what changed in AI, what to ignore, what to bet on. Distilled from 5,000+ sources a week. No hype, just data.
- [Hyperpreneur AI Community](https://eduardklein.com/community/index.md): Free community for founders building agentic sales and marketing. Analyst-grade AI intelligence, open discussion, and Eduard answering in the threads.
- [Playbooks — Build Your Own AI Agent for One Business Process](https://eduardklein.com/playbooks/index.md): Free playbooks that walk you and your coding agent through building an AI agent for one business process: what to build, in what order, where it gets dangerous.
- [Press — 15+ years of thinking in public](https://eduardklein.com/media/index.md): 170+ articles across 100+ publications on SaaS growth, SEO, AI visibility, content marketing, and running the business while building the tech.
- [Privacy Policy](https://eduardklein.com/privacy/index.md): How eduardklein.com collects, uses, and protects your data — written in plain language, compliant with the EU General Data Protection Regulation (GDPR).
- [Terms of Service](https://eduardklein.com/terms/index.md): The terms governing eduardklein.com and the Hyperpreneur Community app at app.eduardklein.com — accounts, subscriptions, licences and responsibilities, in plain language.

## Blog (Deutsch)

- [SaaS-SEO 2026: 62 % der Keywords verloren an AI Overviews](https://eduardklein.com/de/blog/saas-seo-2026/index.md): Wie AI Overviews klassisches SaaS-SEO zerstört haben. Analyse von 4.357 Keywords zeigt die neue Realität für B2B-Unternehmen im Jahr 2026.
- [GEO vs SEO: Warum das alte SEO-Modell 2026 nicht mehr funktioniert](https://eduardklein.com/de/blog/geo-vs-seo/index.md): Warum klassisches SEO 2026 zerbricht. Wie KI und verändertes Suchverhalten das digitale Marketing neu definieren — und was an die Stelle des alten Modells tritt.

## Pages (Deutsch)

- [Datenschutzerklärung](https://eduardklein.com/de/privacy/index.md): Wie eduardklein.com Daten erhebt, nutzt und schützt — verständlich formuliert, konform mit der DSGVO.
- [Über mich](https://eduardklein.com/de/about/index.md): Eduard Klein — KI-Business-Stratege und Tech-Berater. 30 Jahre Softwareentwicklung. 30 Jahre Unternehmertum. Beide Seiten des Tisches.

## Blog (Español)

- [SaaS SEO 2026: el 62 % de las keywords perdidas frente a los AI Overviews](https://eduardklein.com/es/blog/saas-seo-2026/index.md): Cómo los AI Overviews han destruido el SaaS SEO clásico. Análisis de 4.357 keywords revela la nueva realidad de las empresas B2B en 2026.
- [GEO vs SEO: Por qué el viejo modelo SEO ya no funciona en 2026](https://eduardklein.com/es/blog/geo-vs-seo/index.md): El SEO tradicional se está evaporando en 2026. Cómo la IA y los nuevos hábitos de búsqueda transforman el marketing digital — y qué ocupa el lugar del viejo modelo.

## Pages (Español)

- [Aviso Legal](https://eduardklein.com/es/aviso-legal/index.md): Aviso legal de eduardklein.com: titular, datos de contacto, condiciones de uso, propiedad intelectual y jurisdicción, conforme al art. 10 de la LSSI.
- [Política de Privacidad](https://eduardklein.com/es/privacidad/index.md): Cómo eduardklein.com recoge, utiliza y protege tus datos — en lenguaje claro y conforme con el RGPD.
- [Sobre mí](https://eduardklein.com/es/about/index.md): Eduard Klein — estratega de negocio con IA y consultor tecnológico. 30 años desarrollando software. 30 años emprendiendo. Los dos lados de la mesa.

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- [Full text of every page](https://eduardklein.com/llms-full.txt): the whole site as one Markdown file
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