DENVER, Oct. 2, 2020 /PRNewswire/ -- Engrain, the market leader in interactive mapping technology and data visualization software for the built environment, today announced that it has raised $3.7 million in new funding to fuel its national expansion. The round was led by RET Ventures, an industry-backed venture fund focused on single- and multi-family rent tech, along with participation from existing investors. For Engrain, the funding validates the success of the company's recent strategic expansion.