Adam Zeplain, Co-Founder and Managing Partner of Austin-based Mark VC. See portfolio, sector focus and contact routes.
Adam Zeplain, Co-Founder and Managing Partner of Austin-based Mark VC, invests primarily in **early-stage companies** (Seed to Series A) across **security & defense, healthcare, consumer technology, and enterprise SaaS**, with estimated check sizes ranging from **$500K to $5M** for initial deals [1][2]. His portfolio includes notable category leaders such as **CrowdStrike, Reddit, Ring, Anduril, Apptronik, and ZenBusiness** [2][3][4]. Zeplain’s distinctive thesis centers on a **founder-centric approach** that prioritizes deep **behavioral due diligence**, constructing a “360-degree behavioral map” of founders by interviewing their close contacts rather than relying solely on financial metrics [2][10].
This profile is part of the StartupFundraising investor database: focus, portfolio history, disclosed location and contact routes, refreshed as new filings and rounds are ingested. Founders use it to check fit before reaching out and to find investors in Austin.
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