A day after Airbnb Inc. sued a Miami developer claiming a breach of their partnership agreements, the developer responded by accusing the home-sharing giant of abusing its power and taking trade secrets to grow its own business.

NGD Homesharing LLC, led by Harvey Hernandez, and San Francisco-based Airbnb teamed up in a much-hyped venture promising more urban apartments.  But the partnership went sideways, and Airbnb sued NGD and Hernandez in federal court in San Francisco, claiming they failed to deliver any of the seven projects promised for delivery last year.