OWOX BI allows you to get control over your data in Google BigQuery, that is in its turn a paid product provided by Google Cloud Platform.
We recommend to read BigQuery pricing documentation before you start using it.
In order to use OWOX BI services that stream or process data in BigQuery you will have to set up Google Cloud Platfrom billing account and keep it in active status.
Our estimate of GCP costs for a business with 100,000 users related to using OWOX BI services calculated in Google Cloud Platform Pricing Calculator is less than $10 USD. You can modify the calculator's presets to adjust cost evaluation to your requirements.