J12 Ventures is an early-stage venture capital firm that partners with technical founders across Europe, focusing on pre-seed and seed investments. The firm's strategy centers on building category-defining data and AI companies, including those developing AI infrastructure, developer tools, and AI applications for sectors like fintech, health tech, and enterprise software.
33% of their portfolio is in Climate & Energy. Their most common stage is seed (50% of deals). Average disclosed round size is $11.5M (across 6 rounds with reported amounts).
Portfolio
6
Fund Size
$50M
Top Stage
Seed
Last 12 Mo
2
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
6 investments
Top Co-Investors
SE Ventures2 shared
Union Square Ventures2 shared
Adjacent2 shared
Presto1 shared
Plural1 shared
Lakestar1 shared
SignalFire1 shared
Y Combinator1 shared
M12 (Microsoft)1 shared
Essence VC1 shared
Last updated: 8 March 2026