Passbase is completely free to use for up to 50 verifications, for 60 days in Sandbox Mode. When you set up your Passbase account, you'll automatically start in Sandbox mode.
Once you've hit your verification limit in Sandbox Mode and are ready to move to a live environment, you'll need to upgrade to one of our paid plans.
How to upgrade your account
When you're ready to upgrade your account, navigate to Settings > Subscription. From here, you'll be able to select the plan that best fits your needs.