Marc Balestreri

Ventures

Building products at the intersection of AI, longevity, and technology.

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Beginnity

Active
B2C
2025-Present

Your Workouts, Prescribed by Your Biology

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AI-powered fitness coaching that personalizes daily workouts based on biological data. Reads sleep, HRV, and recovery metrics from wearables to prescribe optimal training intensity. Built for the longevity-obsessed.

Features

  • AI workout recommendations delivered each morning
  • Wearable integrations (Apple Watch, Whoop, Oura, Eight Sleep)
  • Sleep, HRV, and recovery analysis
  • Personalized training prescriptions
Next.js
TypeScript
AI/ML
HealthKit

Past Ventures

Bits into Atoms

B2C
2015-2017

3D Printing Farm & Print Routing Software

Founder·28M+ jobs processed

Built a queuing system connecting 3D printing marketplaces to available printers, connecting Shapeways, 3DHubs, and other platforms to on-demand manufacturing capacity.

Company Info

Trunk

B2B
2018-2019

Inventory Management for Small Business

Frontend Partner·218 users·Still operating

Partnered with founder to shape early product roadmap and frontend for an inventory, order, and listing syncing platform, iterating on pricing strategy to find product-market fit.

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Revel Social

B2C
2018-2019

On-Demand Crowd Sourcing

Contract Developer·10K users at launch

Supported CTO in bootstrapping product from concept to launch. Built Vue.js admin interface connecting to Rails backend.

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