The tech firm will be featured on the team's jersey, including a logo on the shoulder.
Salesforce said it wanted to work with the Fever to empower women and encourage diversity.
"What we know is we will change the narrative in our city, state, country around this partnership to say we believe in inclusion," said Fever President Allison Barber. "We believe in opportunity and we are using our opportunity as a basketball team to tell that story. On the court, you'll see great basketball
The two sides did not reveal the length of the deal but said they expect a long-term partnership.