You can get a free ride home in cases of emergency if you used public transit, biked, carpooled, or walked to work.
You may be guaranteed a ride home based on the county you work in, your employer or even the carpool app that you use.
Find the county you work in: Most counties in the SF Bay Area participate, except for Santa Clara County)
In most cases, you and your employer need to register in advance.
If you work in Alameda County, use http://grh.alamedactc.org/
If you work in San Mateo county, https://commute.org/guaranteed-ride
If you work in other counties, try here.
A carpool App: Both Scoop and Duet Apps have programs to get you home.
Bike Roadside Assistance
What if my bike breaks down?
Some roadside assistance and insurance companies cover bike breakdowns.