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J4.Ventures is a venture capital firm that backs early-stage technology companies addressing large markets. Using their technology and entrepreneurship experience, they provide strategic guidance to help founders scale. Core focus is technology-based or technology-enabled businesses across AI, climate, finance, workplace, and wellness. The portfolio includes disruptive innovations in AI and other tech sectors. They leverage operational expertise and venture capital know-how to support growth at scale.
Investment style
Generalist
Data last enriched
Aug 14, 2026
Investing team
- Bruce JaffeGeneral Partner
- Jamie RapperportGeneral Partner
- John MitchellGeneral Partner
- Erik JohnsonGeneral Partner
- Brian JacobsVenture Partner