Kastle

Kastle builds an AI operating system for consumer lending, beginning with the mortgage market. The company develops purpose-built AI voice agents that allow mortgage servicers and lenders to automate high-volume borrower interactions - from loan inquiry through to payoff - while maintaining regulatory compliance. Its platform is described as the most deployed AI voice agent platform in the mortgage industry and operates around the clock, with the company claiming operational cost reductions of up to 80% for users.

The Kastle AI Voice Agent Platform covers servicing, collections and customer service workflows and integrates with major loan servicing systems, including ICE MSP. Around it sits a set of specialised agents: Servicing Agents, Collections Agents, Loss Mitigation Agents, Compliance Agents and Loan Officer Assistants. The underlying technical work spans conversational AI, speech recognition, natural language processing, large language models, workflow automation and enterprise software integration.

Compliance is a central design constraint. Kastle positions its Compliance Agents and its wider product line around trust with FDIC-insured banks and Independent Mortgage Banks, addressing the scrutiny that applies to borrower communications in servicing and collections. The company is active in the United States across mortgage, consumer lending, banking and financial services, and is backed by Y Combinator and Commerce Ventures.