Kastle Raises $24M Series A Led by Insight Partners for AI Agent Platform in Lending

Kastle Secures $24M Series A to Scale AI Agents for Consumer Lending and Mortgage Servicing

Kastle, an applied-AI lab for financial services, has raised $24 million in Series A funding. The round was led by Insight Partners, with participation from Fifth Wall, Commerce Ventures, and Y Combinator. The funding date is September 17, 2026.

What Kastle Does

Kastle builds KastleOS, an AI agent operating platform for consumer lending and mortgage servicing. Its agents automate high-volume borrower workflows such as payment collection, borrower verification, and compliance QA across the loan lifecycle. The company reports production deployments at lenders including Carrington Mortgage Services and a direct integration into ICE Mortgage Technology's MSP servicing system.

Founders and Background

Kastle was founded by Rishi Choudhary and Nitish, both University of Illinois Urbana-Champaign graduates and former employees of Redfin and Verkada. The company is based in San Francisco, CA.

Funding Details

• Round type: Series A
• Amount: $24,000,000 USD
• Lead investor: Insight Partners
• Participating investors: Fifth Wall, Commerce Ventures, Y Combinator
• Funding date: September 17, 2026

Market Context

The funding comes as financial institutions increasingly seek automation for repetitive, high-volume servicing tasks. Kastle's focus on mortgage servicing and consumer lending places it in a segment where compliance and accuracy are critical. The integration with ICE Mortgage Technology's MSP servicing system suggests the company is embedding its agents directly into existing servicing infrastructure.

What's Next

With the new capital, Kastle is positioned to expand its production deployments and further develop its AI agent platform. The involvement of Insight Partners as lead investor signals confidence in the company's approach to applied AI in regulated financial workflows.