Consul only makes sense if you are already using it for something else. If just Vault, you can use DynamoDB (with full HA) or S3 (without HA support), same with

Consul only makes sense if you are already using it for something else. If just Vault, you can use DynamoDB (with full HA) or S3 (without HA support), same with Azure and Google Cloud (although without HA). There are other backends, like PostgreSQL.