Meriden Financial Planning was given the title by VouchedFor.
The website says it checks advisers more thoroughly than any other service, verifies the identity of all reviewers, and never removes or edits negative reviews.
It also checks every adviser is authorised by the appropriate governing body, and confirms key details such as fees and qualifications.
Richard Oliver, director of the firm, said: “VouchedFor is the leading review site in the UK for financial advisers, so we’re delighted to be ‘top rated’ as I know that the rating comes as a result of our clients’ feedback.
“It’s also a reflection of the great work and commitment to clients of the whole team at Meriden.”