Mortgage Brain welcomes the brand new buy-to-let lender, Rely, to its Sourcing Brain and Criteria Brain modules.
Rely, which was officially launched by OSB Group on 12 November 2025, has been developed to provide brokers with an even easier and faster way to transact buy-to-let (BTL) mortgages on behalf of their landlord clients. This new partnership with Mortgage Brain will enable brokers to access Rely’s full range of BTL mortgage products.
With £8.8 billion in new BTL lending recorded in Q2 2025 and rental yields surpassing 7%[i], fast, accurate lending solutions are in high demand. Brokers working with dedicated lenders like Rely, whose searches are powered by Sourcing Brain and Criteria Brain, are ideally positioned to help landlords capitalise on opportunities the moment they arise. Lender product information across both systems is updated twice daily, giving intermediaries the confidence that they’re accessing the most accurate and up-to-date results for their clients.
Adrian Moloney, Group Intermediary Director, 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 & Marketing Director, Mortgage Brain added;
“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 BTL scenarios.”
