- Specialization
- Speech
- Business
- Software Applications
- Market
- Financial Services
- Ecosystem
- Agents
- Customers
- Enterprises
More details
- Organization type
- Commercial Company
- Ecosystem
- Agents
- Business
- Software Applications
- Specialization
- Speech
- Market
- Financial Services
- Customers
- Enterprises
- Delivery models
- Hosted Software
- Revenue models
- Usage Based
- Listing status
- Not classified
- Latest equity round
- Seed
- Reported funding amount
- Not classified
About
Kastle builds AI voice agents and an enterprise AI platform for consumer lending and mortgage servicing. Its agents help lenders and servicers handle borrower contact, payment collection, verification, loan inquiries, quality assurance, and compliance, with purpose-built regulatory controls and explainable responses as differentiators.
Market
Kastle competes in AI-powered contact-center and workflow automation for consumer lending, with a particular focus on mortgage servicing and borrower communications. It positions itself as a mortgage- and consumer-lending-specific AI workforce rather than a generic voice bot, combining domain workflows, multichannel interactions, servicing-system and telephony integrations, and automated quality/compliance review. Its reported production deployment at eight of the top 25 U.S. mortgage servicers provides an enterprise proof point; its competitive set includes mortgage-native vendors such as Marr Labs and broader voice-agent platforms such as Retell AI, Synthflow, and UnleashX.
Kastle targets large U.S. mortgage lenders, servicers, and sub-servicers—especially contact-center, servicing, collections, loss-mitigation, and default-management teams handling high-volume borrower interactions. Its likely buyers are operational and servicing leaders at enterprise financial institutions; Kastle specifically references America's largest mortgage lenders and mortgage-servicing or default-management executives.
At a Glance
Problem
Kastle addresses the operational burden of mortgage servicing and consumer lending, where servicers face rising costs, compliance pressure, low retention, and insufficient support capacity. The highest-value use case is handling repetitive, high-volume borrower interactions—especially collecting payments, answering loan and escrow questions, and supporting collections—without forcing borrowers to wait for a human agent. Kastle says its technology can cut servicing contact-center costs by as much as 80%, while enabling 24/7 support.
Product / Service
Kastle provides a purpose-built AI-agent platform for consumer lending and servicing. Its agents communicate through voice, SMS, email, and chat, connect to a lender’s loan-servicing and telephony systems, retrieve or update account information, leave loan comments, follow existing standard operating procedures, and route complex calls to human employees. The platform includes specialized servicing, collections, loss-mitigation, compliance, loan-officer-assistant, and analytics capabilities, with autonomous agents, agent-assist tools, and quality-control coverage across borrower interactions.
Market
Kastle competes in the emerging market for vertical AI agents and contact-center automation in mortgage servicing and consumer lending. Its differentiation is specialization in regulated mortgage workflows rather than a generic conversational-AI layer. Adjacent alternatives include enterprise banking voice-agent platforms such as PolyAI, Cognigy, and Parloa, as well as collections-focused vendors such as Skit.ai, Prodigal, TrueAccord, and Symend; lenders can also retain conventional human contact centers or build comparable systems internally.
Kastle has meaningful early commercial traction rather than appearing to be merely pre-product: it says its technology is already in production at eight of the 25 largest U.S. mortgage servicers, and Carrington Mortgage Services selected it as an enterprise AI-agent provider in July 2026 for autonomous servicing and collections agents, agent assistance, and interaction-level quality control. The available sources do not disclose revenue or Carrington’s financial terms, but the production deployments and enterprise partnership indicate active commercialization.
Founders & Leadership
Funding History
Y Combinator
Commerce Ventures, Y Combinator
Recent News
Kastle announced a $24 million Series A on September 17, 2026, led by Insight Partners, with continued participation from Y Combinator and Commerce Ventures and new participation from Fifth Wall and other investors. The company said it will use the funding to expand its engineering, product, and go-to-market teams and accelerate deployments with banks and financial institutions.
New American Funding announced a partnership with Kastle to deploy Kastle’s Voice AI technology across mortgage origination and servicing. The AI agents are intended to handle end-to-end customer interactions, provide 24/7 self-service, reduce hold times, and support compliance while allowing staff to focus on more complex cases.
National Mortgage Professional reported that Kastle integrated directly with the ICE MSP Mortgage Servicing System, enabling its AI agents to retrieve loan data and execute servicing actions.
A Kastle job listing stated that the company was backed by $2.3 million from Y Combinator, Commerce Ventures, and executives from Snapdocs, Google, and WePay, while building an AI operating system for consumer lending.
Active Roles
14Business Model
Kastle monetizes enterprise AI-agent deployments for lenders and mortgage servicers using a usage-based pricing model. Its demo-led sales motion targets large financial institutions seeking to reduce servicing and contact-center costs.