[varikin]

It says both:

| It can host the data in the file system, Amazon S3, Google Cloud, HuaweiCloud OBS etc.

and

| For now, we support two storage types: file system and S3 storages.

Along with lack of LDAP or federated login, it doesn't seem ready to try or recommend yet.

[Karliss]

Can't the storage thing be explained by other cloud providers having storage solutions that are compatible with Amazon S3 API?

[dividedbyzero]

I don't think Google Cloud Storage is S3 compatible in any meaningful way

[dragonwriter]

Whether this is meaningful or not is subjective, but:

https://cloud.google.com/storage/docs/interoperability