Cobblestone

Cobblestone launched their MVP in under four months with a deliberately narrow focus: fraud detection for rent payments at institutional landlords. They stripped away tenant communication tools, portfolio analytics, and integration with accounting systems—features competitors offered but that didn't directly address their core problem. Instead, they built a rule-based system that flagged suspicious payment patterns and identity mismatches, then manually reviewed flagged cases with their first customers. This stripped-down approach forced rapid customer feedback loops. Within six weeks, their pilot customer—managing 2,000 units—identified $180K in prevented fraud losses, validating the core hypothesis. The manual review component, though labor-intensive, revealed which fraud signals actually mattered to operators, informing their automation roadmap. Early traction with this specific metric gave them credibility to expand into broader delinquency reduction features. The constraint of shipping fast meant they learned what institutional landlords truly valued before over-engineering.