Bay raises $37M Series A led by Battery Ventures for AI agent security

Battery Ventures led the Series A, with Micron Ventures and Microsoft's M12 venture arm participating. Including the earlier seed, the company reports $50 million in cumulative funding. The Israeli company emerged from roughly nine months in stealth to launch the product.

Bay builds security technology that monitors and controls the actions AI agents take, vetting them before they run against enterprise systems. The product targets the risk created when autonomous software touches corporate data and tools.

For founders, the raise shows enterprise security buyers will fund controls that sit between an agent and the systems it can reach. Teams shipping agents should plan for permission checks, action logs and approval steps, since security reviews now ask for them early. The launch also lets buyers compare its controls against larger AI security vendors selling into the same accounts.