The San Diego-based software developer eSub Construction Software has raised $12 million in a new round of financing for its project management platform for contractors. The company’s funding was led by Catalyst Investors with participation from previous investor Revolution Ventures. Software for the construction industry is becoming a big business and attracting more capital from investors. Construction management software vendor Procore is now worth $3 billion, thanks to a $75 million investment late last year from Tiger Global. Indeed, unicorns are galloping across the construction industry these days.