The first 5, 20, or 2000 candidates are unlocked automatically on our Free, Basic and Premium plans accordingly.
In case you'd like to unlock more candidates, you can purchase them at $1 per candidate from "Plans and Billing" in your account. If you do that, you can then choose which of the locked candidates in your account to be able to view.
The number of candidates on all our plans is capped per year, and even if a candidate is archived or deleted, once they were active in your account, it counts towards the limit.