The Pitch #181 ROOK: The VC Vibe Check
Mar 11, 2026
Marco Benitez, founder of Rook, built an API that integrates and cleans wearable data for insurers and hospitals. Elizabeth Yin, venture investor at Hustle Fund, asks sharp questions and evaluates founder-investor fit. They discuss Rook’s integrations, go-to-market, fundraising dynamics, runway concerns, and the importance of vibe and partner alignment in raising capital.
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Pivot From Mexico Hardware To US API
- Marco pivoted from hardware in Mexico to a U.S.-focused API after Techstars and raised ~$2M at demo day to build the platform.
- He relocated his family to the U.S. to access market, network, and fundraising opportunities.
Fix Cap Table Early Or Pay Later
- Rework bad early cap table terms with legal counsel and renegotiate advisors to reclaim equity before raising again.
- Marco renegotiated with prior advisors and moved from ~57% to 69% founder ownership today.
ARR Scale From Midmarket Dev Customers
- With 50 clients Rook reached $400K ARR and expects ~$1M ARR next quarter by closing 2–3 new clients monthly.
- Typical client spends roughly $2,000/month and integrations now take 30–60 days.