What are the costs of having an account?

Apart from the costs for sending SMS messages, no other costs or fees are charged.
Only exception can be that there are costs charged for whitelisting a senderid. But usually that is free of charge.

Billing

• Will I be alerted when I run out of credits?
• Can I get an invoice?
• What are the costs of having an account?
• Can I purchase more credits?
• Do I have to pay for text messages that are not being delivered?
• Does my credit expire?