Jack Altman on Product-Market Fit

What It Covers

Jack Altman, cofounder of Lattice (valued at $3B) and founder of Alt Capital's $275M fund, shares frameworks on product-market fit, cofounder dynamics, early hiring strategy, and fundraising mechanics drawn from building Lattice across four product lines from 2015 to unicorn status.

Key Questions Answered

• •Product-Market Fit Signal: When customers genuinely want a product, traction appears quickly — not after one more feature. Altman pivoted Lattice twice before finding fit on the third attempt. Use speed of pull as the primary signal: if you're constantly adding features without momentum, treat that as a pivot trigger, not a roadmap problem.
• •Customer Feedback Filter: Responding to every customer request and ignoring all feedback are equally damaging. The functional approach is using customer input to fill in details within a pre-defined product vision. When a large enterprise offers a significant contract for a unique feature, evaluate whether that feature will serve a broader customer segment before committing.
• •Early Sales Hiring: Avoid hiring sales reps from large, structured organizations when the sales process itself is still undefined. Early-stage reps need entrepreneurial instincts to build the playbook, not execute one. Altman found that reps conditioned to throughput-based selling underperformed when the product and process required simultaneous invention and iteration.
• •Cofounder Selection: Effective cofounder relationships require two distinct elements: personal trust that prevents premature quitting during hard stretches, and professional trust that enables clean domain separation. Altman and Eric Koslow argued openly over ideas without personal attacks, maintained divided ownership of functions, and avoided duplicating effort by second-guessing each other's decisions.
• •Proactive vs. Reactive Work: As companies scale past roughly 20 employees, founders shift from doing work to building systems that do the work. The compounding habit Altman identifies is structuring time around a personal to-do list rather than an inbox or others' meeting requests — targeting reactive work at roughly 9% of total time, not the common 90%.