Mortgage Brain has added the newly launched buy-to-let lender Rely to its Sourcing Brain and Criteria Brain platforms, enabling brokers to access the full range of Rely’s mortgage products.
Rely, introduced by OSB Group on 12 November 2025, has been designed to offer brokers a faster and more streamlined way of transacting buy-to-let mortgages for landlord clients.
Demand for accurate and timely product information in the buy-to-let market continues to grow, with £8.8bn in new lending recorded in Q2 2025 and rental yields now above 7%.
Mortgage Brain said the integration allows brokers using its technology to capitalise on opportunities quickly, with lender data updated twice daily across both systems to ensure product accuracy and consistency for intermediaries.
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, 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.”
