SPOTLIGHT: Why 80% of B2B Buying Happens Without You | Alexander Kesler, CEO @ INFUSE
Alex Kessler, CEO of Infuse, discusses how 80% of B2B buying happens in the "dark funnel" without vendor contact, and introduces the concepts of "day zero" and "day one" shortlists to explain how buyers now conduct their purchasing journeys using AI and peer research before engaging with salespeople.
Summary
Sam Jacobs interviews Alex Kessler, founder and CEO of Infuse, a B2B demand generation company with 14 years of experience. Kessler explains how the traditional marketing funnel (awareness, consideration, decision) has fundamentally changed due to digital marketing, ABM strategies, and generative AI adoption.
The concept of the "dark funnel" emerged as buyers became overwhelmed by outreach and opted to conduct their own research without engaging salespeople. Research shows 80% of the buying journey now happens without vendor interaction, as buyers access webinars, white papers, and peer recommendations independently. AI has accelerated this trend—buyers now ask ChatGPT which vendors to consider rather than relying on salespeople for education.
Kessler introduces two critical concepts: "day one shortlist" (vendors identified through AI searches when a buyer actively has a need) and "day zero shortlist" (vendors already trusted and known to buyers before they enter the market). He argues that day zero shortlist placement is achieved through relationship-building and thought leadership before buyers have an active problem.
Kessler criticizes over-optimization in ABM strategies that focus 100% of marketing spend on 3,000 accounts, potentially missing broader market opportunities. He advocates returning to Marketing 101 principles: establishing relationships, delivering value, and building thought leadership with the target market before they enter active buying mode.
Kessler also discusses Generative Engine Optimization (GEO)—ensuring visibility when buyers search AI tools for solutions. However, GEO remains opaque compared to SEO since AI personalizes results and lacks published best practices. He emphasizes the importance of maintaining a flexible mindset as B2B marketing evolves, recommending marketers stay informed through research on shifting buyer and marketer behaviors. Kessler concludes by highlighting Infuse's core value of "doing the right thing" with clients and team members.
About this episode
<p>Buyers stopped picking up the phone. They research on their own, ask their peers, and now they ask AI which vendors to consider before a single salesperson ever hears about it. So where does that leave marketers?</p> <p>Sam Jacobs sits down with Alexander Kesler, founder and CEO of Infuse, to break down the dark funnel and what it means for B2B demand gen right now. They get into why most of the buying journey happens before you're ever contacted, how AI tools are generating "day one" shortlists on the spot, and why the real game is earning a spot on the day zero shortlist — the vendors a buyer already trusts no matter what ChatGPT says.</p> <p>Alex has spent 25+ years building companies across marketing, media, and data, and is the author of two books on B2B marketing best practices. His advice for marketers comes down to one thing: stay flexible, read the research, and build the relationship before the buyer is in market.<br /> <br /> What we get into:<br /> Why the traditional B2B sales funnel no longer reflects how today's buyers actually buy<br /> What the Dark Funnel is and why 80% of the buying journey happens before prospects contact sales<br /> The difference between Day Zero and Day One shortlists and why every marketer needs to understand both<br /> How AI and Generative Engine Optimization (GEO) are reshaping vendor discovery<br /> Why building trust and thought leadership before buyers are in-market is the new competitive advantage<br /> Alex Kesler's advice for modern B2B marketers on staying relevant in an AI-first world</p> <p class="PDq2pG_selectionAnchorContainer">Chapters:</p> <p>00:00 Intro<br /> 00:36 Meet Alex Kesler and Infuse<br /> 03:10 The dark funnel explained<br /> 05:16 Why buyers don't want to talk to sales anymore<br /> 08:07 The AI buying journey and Day One shortlists<br /> 11:28 GEO: Winning recommendations from AI search<br /> 14:07 Day Zero vs. Day One: The new marketing playbook<br /> 16:06 Marketing 101 is making a comeback<br /> 16:27 Why ABM can limit your growth<br /> 17:35 The #1 trait every modern B2B marketer needs<br /> 19:20 Alex's leadership philosophy: Do the right thing<br /> 20:36 Where to find Alex and Infuse<br /> Try Infuse: infuse.com</p>
Key Insights
- Kessler argues that 80% of the B2B buying journey now occurs in the dark funnel where buyers conduct research, access resources, and consult peers without engaging vendors, fundamentally shifting where marketers need to invest attention.
- Kessler claims that generative AI is creating a new layer of buyer behavior where purchasers ask AI tools like ChatGPT for vendor shortlists, making GEO (Generative Engine Optimization) necessary but largely opaque compared to traditional SEO since AI personalizes results without published best practices.
- Kessler identifies that marketers are losing market share through over-optimized ABM strategies that concentrate 100% of spend on narrow account lists, missing broader opportunities with companies that need solutions but never enter the vendor's radar.
- Kessler distinguishes between day zero shortlists (vendors already trusted through prior relationships before buying need arises) and day one shortlists (vendors identified during active purchase research), arguing day zero placement requires pre-market relationship building and thought leadership.
- Kessler contends that the contemporary B2B environment is fundamentally buyer-driven rather than seller-driven, requiring marketers to align with how buyers prefer to learn and decide rather than pushing early sales engagement, despite ingrained sales organization habits.
Topics
Transcript
. Hi everybody, it's Sam Jacobs. Welcome back to Top Line Spotlight. If you don't know Top Line Spotlight, it's a short segment where we interview an entrepreneur or operator that's out there in the field, and we're going to ask them about a problem or challenge that they've been seeing in the market or that they've tackled over the last 12 to 18 months. We try to make it as impactful and practical as possible. And we're really excited today. We've got on the show, Alex Kessler. Alex is the founder and CEO of Infuse, a global B2B demand generation company, helping organizations drive measurable pipeline through data, content, intent, and performance marketing. He's a serial entrepreneur with more…
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