From EULA:
https://www.avast.com/eula2.1.2. In the case of all other Solutions, including Avast Free Antivirus, AVG Free Antivirus, CCleaner Free and all other Solutions for which you are not required to pay a subscription fee or other price either to obtain the Solution or to continue using the Solution after a trial period (each, a “Consumer Solution”), by a natural person, or members of his household for personal, noncommercial purposes. For the avoidance of doubt, no Consumer Solution is provided or licensed for use by any: (i) natural person for commercial purposes; or (ii) business, company, government entity, nongovernmental organization or other not-for-profit entity, or educational institution.