The price plans are all monthly-recurring credits-purchase based, with the option to buy add-ons such as one-time top-up credit package, monthly long code and/or monthly per-user license for the Conversa Portal. There is a 14-day free trial available for sign-up only for non-WhatsApp Business API (WABA) Account and WeChat Official Account (OA) (i.e., for Basic Plan). You may check out the price plans for more details.