Kensington has cut rates by up to 30 basis points, GB Bank by up to 25bps and Pepper Money by 20bps.
At Kensington, the biggest reductions are across its Hero, Professional Own New and eKo products.
The lender is also lowering its Residential Select two-year fixed rates by up to 15bps, with a two-year fixed at 75% loan-to-value now 5.19% with a £1,999 fee.
All products include a free valuation, and remortgage clients can choose £250 cashback or free standard legals.
GB Bank has reduced rates across its core buy-to-let range.
The lender has cut two-year and three-year fixed rates by 25 basis points and five-year fixed rates by 20bps.
Rates are available immediately through intermediaries and now start from 4.69% at 65% LTV and 4.92% at 75% LTV.
The core range is available to first-time landlords, professional landlords, limited companies and special purpose vehicles (SPVs).
GB Bank will also consider houses in multiple occupation (HMOs), multi-unit blocks, mixed-use properties and complex overseas structures, including overseas trusts and SPVs.
At Pepper Money, rates are falling by 20bps across its whole range.
Limited Edition Pepper 48 Light rates at 85% LTV now start from 5.79 and residential rates up to 75% LTV now start from 5.55%.
Buy-to-let up rates to 70% LTV now start from 4.44% and shared ownership rates up to 95% loan-to-share value (LSV) now start from 5.9% .
Pepper sales director Paul Adams says: “We are seeing that an increasing number of customers need a more considered approach to mortgage lending, and brokers play a vital role in helping them find the right solution.
“With the ability to consider customers with recent credit events, as well as flexibility around self-employed and variable income, our criteria are designed to look at each customer’s full story.
“By reducing rates across our entire range, we’re giving brokers more options to support just-off-high-street customers and helping more people move forward with their home ownership plans.”