As reported by the Philadelphia Business Journal on the company expanding to 15,000 square feet in Center City without tax incentives:

Viridity, a provider of software and services used by building managers and others to manage their energy consumption, moved downtown to be in a centrally located spot with access to transportation accessible to clients in New York and Washington. It also wanted to attract talented employees, and commit to Philadelphia. It received no money from the state or the city to move.

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See the official press release here.