Half the new money will go toward Switch and predictive dialling technology, the rest toward hiring staff at its Richmond and Portsmouth offices.
The telemarketing group has clients in financial services, utilities, telecoms, broadcast and motoring sectors, including BUPA, Centrica and Volkswagen.
Listening Company chief executive Neville Upton said: "We've enjoyed consistent and structured growth over the past four years and there are many other opportunities for further growth."
"The fact that we have been able to attract such brand name clients as BUPA, O2 and Volkswagen shows that we have the skills, experience and facilities to work at this level."
The company said turnover had passed 拢12m, a 40% increase on last year.
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