How OneCrew resisted horizontal expansion to dominate one vertical in construction software | Ari Bleemer

OneCrew is building end-to-end operational software for asphalt and concrete contractors—a segment caught between Procore's general contractor focus and ServiceTitan's field services model. After leaving Bain & Company and Google, Ari Bleemer and his co-founder Max identified that self-performing specialty contractors who handle everything from estimating to payment collection had no purpose-built platform. In this episode, Ari shares how they've spent four and a half years building trust in an industry skeptical of software promises, why they resisted the urge to expand horizontally across multiple construction trades, and what they learned about sustainable vertical SaaS growth.

Topics Discussed:

• How the middle segment of construction—self-performing contractors who run the full project lifecycle—remains structurally underserved

• Building trust in a market burned by consultants promising custom software for $10,000 that never works

• Why every employee at OneCrew, regardless of function, goes through industry-specific onboarding to learn paving terminology and contractor workflows

• The strategic decision to delay expansion into adjacent verticals despite having configurable product architecture

• How sustained market presence compounds credibility faster than any go-to-market tactic

GTM Lessons For B2B Founders:

• Map the white space between dominant platforms: OneCrew identified that Procore owns general contractors coordinating multiple trades, while ServiceTitan and others own single-visit field services. The gap: specialty contractors executing complete projects—estimating, proposing, executing, and collecting payment. Ari describes it as "the entire middle of the industry where you have a lot of self perform contractors, specialty contractors, trade contractors, subcontractors...that are actually running a process from start to end." Map your market by understanding what established platforms actually serve versus claim to serve, then target the operational workflows that fall through the cracks.

• Use "niche" skepticism as market validation: When VCs, friends, and family question if your market is too narrow, you've likely found defensible positioning. Ari's test: "Have you been on a sidewalk today? Have you driven on a road today? Have you been in a parking lot today?" The paving industry powers daily infrastructure but gets zero attention from horizontal software players or large AI companies. Founders should seek markets where usage is ubiquitous but mindshare and software investment are minimal—that's where you build sustainable moats.

• Make product fluency a company-wide competency: OneCrew requires every hire—engineers, sales, operations—to learn paving industry terminology, contractor pain points, and workflow nuances during onboarding. This isn't just sales training; it's embedding industry context into product decisions, customer conversations, and roadmap prioritization. The payoff: "Contractors come up to us and say like, it feels like you guys actually get it, which there's no better compliment for us." In vertical SaaS, domain expertise distributed across the entire company drives faster iteration cycles and deeper customer trust than any single "industry expert" hire.

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