As of my knowledge cutoff in September 2021, specific revenue figures for "the PropTech group" are not available without a particular company's name. The PropTech industry, however, has seen substantial growth globally, with increasing investments and market expansion. In India, the sector is experiencing rapid development, contributing significantly to the real estate industry's revenue. For the most accurate and up-to-date revenue information, it's recommended to consult recent financial reports or market research specific to the company or sector.