Engrain Raises $3.7 Million in Funding Round Led by RET Ventures to Scale the Growth of its Building Mapping Technology Capital raise to support continued product development, software integrations, and business development efforts DENVER, October 2, 2020-- 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.