Mortgage Brain has added OSB Group’s newly launched buy-to-let lender, Rely, to its Sourcing Brain and Criteria Brain systems.
The integration, announced less than a week after Rely’s debut, gives brokers access to the lender’s full range of buy-to-let products through Mortgage Brain’s sourcing and criteria tools.
NEW LENDER ON THE PLATFORM
Rely was launched by OSB Group on 12 November as a specialist buy-to-let lender designed to streamline transactions for brokers and their landlord clients. Its addition to Mortgage Brain’s systems brings the product set alongside thousands of others already searchable within the platform.
The move comes during a period of heightened activity in the sector. Industry data shows £8.8 billion of new buy-to-let lending was completed in the second quarter of the year, while rental yields continue to exceed 7%.
With demand for quick and accurate solutions increasing, both firms say the partnership will help brokers respond more efficiently to market opportunities.
Mortgage Brain updates product information across Sourcing Brain and Criteria Brain twice a day, giving intermediaries access to current rates, criteria and loan options.
Adrian Moloney, group intermediary director at OSB Group, said:“We’re thrilled to partner with Mortgage Brain, a leading force in mortgage technology and a company that shares our vision for delivering a smarter, more efficient experience for brokers and their clients.
“This collaboration brings together two businesses united by similar values with a focus on enabling brokers to do their best work.
“Through Sourcing Brain and Criteria Brain, Rely can offer brokers even greater accessibility to our data-driven lending platform, helping them find solutions faster, manage risk more confidently, and deliver exceptional outcomes for their clients.”
Neil Wyatt, sales and marketing director at Mortgage Brain, said:“We’re delighted to welcome Rely to Sourcing Brain and Criteria Brain.
“Mortgage Brain has enjoyed a respected and mutually supportive relationship with OSB Group for many years and so this partnership is a natural fit.
“Both Mortgage Brain and Rely share a commitment to innovation, efficiency, and empowering brokers with smarter technology. Together, we’re making specialist lending simpler, faster and more predictable for brokers and their clients, with greater product choice, value and confidence across a wide range of buy-to-let scenarios.”
INDUSTRY CONTEXT
The addition of Rely increases the reach of OSB Group within the intermediary market and expands the choice available to brokers working in specialist lending. Mortgage Brain said the partnership further strengthens its long-standing relationship with the group, whose other brands include Precise Mortgages and Kent Reliance for Intermediaries.
For brokers, the integration is expected to improve accessibility and speed at a time when product changes remain frequent and landlords continue to adjust to shifting tax and regulatory pressures.
With competitive buy-to-let products still in strong demand among UK-based and overseas investors, technology-driven sourcing tools remain a central part of the advice process.
The companies said they expect the partnership to support brokers in navigating an increasingly complex market, with more predictable outcomes for landlord borrowers.




