Making complex lending simple.
Mast is the origination infrastructure banks and lenders run on. Headless, API-first, and built so AI agents can execute from application to completion inside your lending policies.
Start with a conversation, not a procurement process.
Customer Stories
Building societies, specialist lenders, and banks are already live on Mast. Read their stories in their own words.
“It has been great to work in true partnership with Mast, who really took the time to understand our business. We have been very impressed with their responsiveness to requirements and their passion to support our change agenda.”
“Mast's ability to understand our needs and collaborate closely has been vital in driving our digital transformation. Their platform has truly empowered us to improve both our processes and customer experience.”
“Mast has been instrumental in transforming our mortgage origination workflows for our intermediary channel. Their platform not only enhances efficiency but also provides the level of control and clarity our intermediaries need to serve clients seamlessly.”
AI-native underwriting, built on Mast
Mast is the operating layer AI agents run on: a headless, API-first origination platform for banks and lenders, from application to completion.
The operating layer for AI in lending
Agents need structured data, permissioned actions, and a full audit trail. Mast provides the origination substrate they operate on.
Run agents on Mast
Headless, API-first workflows across application, underwriting, offer, and completion, so agents execute inside your lending policies, not around them.
Control and trust by default
Human-in-the-loop checkpoints, explainable decisions, and end-to-end logging for governance, audit, and regulator readiness.
Rebuilt from first principles
Most lending systems are built on old foundations. We rebuilt origination from the ground up, so AI agents run on clean infrastructure.
Workflows
Every application is a sequence of verifiable, auditable steps.
Decisions
Policy-bound, explainable outcomes that humans and agents can trust.
Data
Structured, portable information that flows between systems without friction.
Compliance
Regulatory and audit requirements embedded from the ground up.
The Future of Mortgage Origination
Built for autonomous, policy-bound underwriting. Our cloud-native, self-service tools help lenders streamline operations, adapt to market changes, and put AI to work safely.
Powering the future of lending with scalable infrastructure
API-first, cloud-native infrastructure. Continuous releases, no maintenance windows, no downtime for your teams or brokers.
Modular building blocks for bespoke journeys
Tailor the platform to meet your unique needs, from integrations and workflows to agent guardrails, with full configurability.
Enhanced decision making
Explainable, policy-bound decisions shared by underwriters and AI agents alike.
Discover the Mast Platform
Cloud-native, API-first platform
Headless origination infrastructure with fast implementation and zero-downtime updates.
Fast implementation
Get live in weeks, not years, with our modular deployment approach.
Custom & complex forms
Configure bespoke journeys for any product or borrower profile, whether human or agent-driven.
Agent orchestration
Route work across humans and AI agents, with automations that follow your lending policy.
Modular architecture
Compose the platform from independent building blocks, end-to-end from application to completion.
Agent-ready decision engine
Explainable, policy-bound decisions that AI agents and underwriters share.
Agent-ready policy configuration
Change workflows, policies, and agent guardrails without engineering.
Growth-orientated pricing
Commercial models that scale as you grow.
Industry Recognition
In 2026, Mast won Best mortgage technology at the MoneyAge Awards and was shortlisted for LendTech of the Year at the UK Fintech Awards in 2025 and 2026.
Designed to be lender-first
Our products ensure that lenders receive perfectly packaged applications, every time, packaged by humans and AI agents working side by side inside your policies.
Flexibility for lenders
Choose from a suite of modular components that integrate into existing systems to enhance mortgage service offerings.
Better for brokers
No more clunky forms or obscure processes. Brokers get real-time feedback on every application data point, based on your lending policies.
Simplify operations
Reduce manual intervention and expedite the underwriting process.
Partnerships
Our flexible approach lets us quickly add new integrations to our platform, empowering clients to build customised solutions that meet their exact needs.
Security is the bedrock of our platform
Enterprise-grade security backed by compliance with stringent industry standards, with AI auditability, explainability, and governance built in, so every agent action is logged, attributable, and reviewable.
Certified with independent audits.
Infrastructure and performance monitoring.
Keeping your data safe from cyber attacks.
Ready to put agents to work?
Let's talk about how Mast can be the infrastructure your AI-native lending operation runs on.
Get in touch