Grackle Infrastructure is hosted on GCP and by default, all data is encrypted at rest automatically.
https://cloud.google.com/docs/security/encryption/default-encryption
In addition, Grackle utilizes MongoDB Atlas to store non-sensitive data that is used to operate the system, such as managing licenses and users. MongoDB Atlas also encrypts all data at rest by default. https://www.mongodb.com/docs/manual/tutorial/configure-encryption/