Researchers found 1,514 savings deals on the market - 312 fewer deals than were on offer in December 2019.
Ms Springall urged savers to review their accounts.
She added: "The sight of record low interest rates may cause apathy among savers, but it is vital they continue to compare deals on a frequent basis, especially if they have their cash within an easy access account or are about to come off a fixed-rate deal.
"There are many challenger banks that continue to take a consistent place within the top rate tables, so it really is worth considering these more unfamiliar brands if savers are hunting down the most attractive rates."