At Lyft, RSUs are subject to a 4-year vesting schedule: 25% vests at the end of the 1st year (cliff), then 25% in each of the 2nd, 3rd and 4th years (6.25% every 3 months).

Alternatively, Lyft has now begun issuing single year vesting schedules with no cliff. Candidates receive a grant for their first year vesting every 3 months, and upon yearly evaluation receive grants for subsequent years. The pros are protection from the stock price declining, the cons being that you may see limited upside from stock growth.