Investment in prop-tech companies rose marginally to record USD 551 million last year amid surge in adoption of virtual platforms for real estate marketing during the Covid-19 pandemic, according to Housing.com.In its report titled ‘PropTech: The Future of Real Estate in India’, realty portal Housing.com said USD 2.4 billion has been invested so far in India's prop-tech industry across 225 deals.Also Read | Australia’s prime time battle against big techHousing.com is part of Singapore-based Elara Technologies that also owns Makaan.com and PropTiger."Investments in the prop-tech segment grew marginally up to USD 551 million in 2020 from USD 549 million in 2019," the report said.This has been the peak investments since tech-based start-up.