OMS extends mainstream reach with Nationwide Building Society API integration

25 March 2025

One Mortgage System (OMS), the single-input enquiry to completion processing platform for intermediaries, has proudly announced its latest mainstream lending milestone through a full application programming interface (API) integration with the world’s largest building society and industry titan, Nationwide Building Society.

This integration marks a huge coup for the tech provider. It represents its first major partnership with one of the ‘big six’ UK high street lenders and provides a pivotal extension to its ever-growing footprint across the UK lending arena.

Through a comprehensive two-way integration, OMS users will be able to seamlessly access Nationwide’s extensive product range in a bid to further empower more brokers to deliver swift and informed lending solutions which can meet all their clients ever-shifting demands.

OMS is the only end-to-end platform which covers such a wide range of product areas including residential, buy-to-let, second charge, equity release, bridging, commercial plus general insurance, and protection. It is integrated with market-leading providers – Ignite, Submissions Brain, The Source, Twenty7Tec, iPipeline, Hometrack, Experian, Equifax, Uinsure, Air Sourcing and Knowledge Bank – to provide users with best in class for product sourcing, protection sourcing and criteria searching.

Neal Jannels, Managing Director of One Mortgage System (OMS), commented:

“The influence of Nationwide on the UK lending landscape continues to grow, at pace, and it’s reassuring to see a lender of its size and scale constantly looking to improve efficiencies, accessibility and product availability through tech partnerships which are hugely beneficial to advisers and their clients.

“This integration represents a real breakthrough for OMS in the mainstream mortgage market following our rise to prominence across the more specialist lending sectors. And it’s just the beginning in our ongoing quest to make our platform the go-to partner for all lenders and the CRM solution of choice for intermediary firms across the UK.”

Andy Tilsley, Head of Intermediary Digital at Nationwide Building Society, said:

“New technical integrations, like this one with One Mortgage System, makes it easier for brokers to do business with us and improves the service overall. One Mortgage System’s use of data and the facility of Application Programming Interface, means brokers are assured they have all the right information in one place to undertake a more efficient mortgage process with us and get to a Decision-in-Principle quicker than ever before.”