The agencies came 81st, 51st and 40th respectively in the annual league table of the best small companies to work for.
Experiential agency RPM was included for the fifth year running, picking up credit for
leadership, staff engagement and career development.
RPM founding partner and chief executive Hugh Robertson said: "Our belief in the power of experience runs through everything we do, and that includes our internal processes. To be the only company ranking in the top 50 for five years on the trot is a fantastic achievement. It also speaks wonders for the marketing industry as a whole, with so many agencies featuring throughout the table."
DRP Group appeared in the list for the first time this year, while Jack Morton Worldwide appeared for the second year running.
DRP Group managing director Dale Parmenter said: "To enter the Top 100 Companies list in our first attempt is a great achievement to say the least, but to make it to 51st position has demonstrated that the company's approach to the wellbeing of our people, their training, reward and recognition has paid dividends, especially in the trying times of the last 18 months."