Instacart's co-founder routed all early customer support calls to his personal phone. This forced him to personally experience every service failure, which then directly informed the product roadmap. It created a tight feedback loop between customer pain and product development.

Tock rejected traditional focus groups and instead embedded its software engineers directly into restaurants to work shifts as hosts. This forced immersion gave the engineering team firsthand experience with the end-user's pain points, leading to a far more intuitive and effective product than surveys could produce.

Fundrise decides which software companies to back by first becoming a power user of their products (e.g., Ramp, Intercom). This firsthand experience provides deeper conviction and a more accurate assessment of product quality than any external analysis could achieve.

When you "scratch your own itch," you intrinsically understand the problem, competitive landscape, and target community. Most importantly, you become your own best quality assurance, knowing instinctively if the product is good enough—a massive advantage over building for an unfamiliar customer.

To fix a 'janky' product, Wealthsimple required its design team to use the app with their own money. This created deep empathy for user pain points and established a company-wide philosophy that using your own product is the only way to make it great.

Mercury Bank's founder, Ahmad Akund, attributes their "instant product-market fit" to building a product he personally needed as an entrepreneur for years. This deep, firsthand understanding of the user's pain allowed him to build a solution with the right features from day one.

To truly understand a B2B customer's pain, interviews are not enough. The best founders immerse themselves completely by 'going native'—taking a temporary job at a target company to experience their problems firsthand. This uncovers authentic needs that surface-level research misses.

Instead of just interviewing users, the founder gained the deepest possible insights by taking an entry-level job in his target industry. This provided granular, firsthand knowledge of workflows and pain points that no interview could reveal, allowing him to build the right product from day one.

To find PMF, founders should embed themselves with the most discerning, representative buyer they can find. The goal is to live in their world, understand their mental model, and uncover the non-obvious points of friction that consensus software misses.