If you would like to close your account, please reach out to support@lob.com with your Account ID. You may locate your Account ID, by going to your Lob Dashboard > Settings > Account Information.
Alternatively, you may downgrade to the Developer edition ($0 subscription fee) and keep your account with Lob open. This will allow you to return to Lob at any point in time while ensuring that you do not get charged. Downgrading only applies to accounts under a paying subscription (Startup, Growth etc).
Note: the downgrade will take effect at the start of your next billing cycle (e.g., start of next calendar month if on monthly term).