Securing AI-written software became a funded category in one day: $125M into two startups.

Boston-based Neo raised $100M in combined seed and Series A from a16z, Bessemer, Craft Ventures, and Merlin Ventures to help teams "see, review, and control AI-enabled software," while Empirical Security raised $25M Series A led by Brightmind Partners. A $100M seed-plus-A is an unusual structure, and it signals investors treating AI application security as a land grab where the winner needs enterprise distribution immediately rather than iteration time. This is the counterweight to vibe-coded internal tools: the same shift letting ops teams replace SaaS in days is creating a review surface nobody owns.