What it argues
The Lean B2B is a practical guide to applying lean startup principles specifically to the business-to-business context. Étienne Garbugli wrote it after conducting hundreds of interviews with founders and early employees at B2B startups, and the book reflects what actually works in selling to companies rather than to consumers — a context where the customer, the buyer, and the user are often different people, purchasing decisions involve politics and procurement, and a single contract can represent months of revenue.
The book's central argument is that B2B customer development is fundamentally different from consumer customer development in ways that most lean startup frameworks ignore. B2B sales involve longer cycles, multiple stakeholders, and problems embedded in organizational workflows that are hard to see from the outside. Getting to the truth requires more preparation, more targeted access, and more honest conversation than most founders bring to early discovery. Garbugli is direct about the common failure mode: founders who interview potential customers but ask the wrong questions, validate too early on weak signals, and build before they've confirmed they're solving a problem that someone is actively paying to solve.
What it gets right
- 1.
B2B customer development differs from consumer development in critical ways: multiple stakeholders, longer cycles, budget processes, and organizational politics all affect what founders should be testing and when.
- 2.
The early adopter in B2B is not just someone who likes new products — it's someone with a problem they acknowledge, real pain, budget, authority to act, and urgency. All five conditions matter.
- 3.
Problem-solution fit in B2B requires confirming the customer has a problem worth paying to solve before building anything. Most founders validate too early on weak signals.
What it covers
Who wrote it
Étienne Garbugli is a Canadian entrepreneur, product designer, and author based in Montreal. He has founded and co-founded multiple B2B startups and has spent years conducting research on how software companies find and validate their markets. He also wrote Lean B2B: Build Products Businesses Want, the expanded second edition of this book. His work focuses on the practical mechanics of early-stage product and market development, particularly in enterprise and small-business software contexts. He teaches and consults on product and growth topics for early-stage B2B teams.
