I have not tried to benchmark Atlas but I am not sure the result would be meaningful. Atlas is an in-memory database, QuestDB persists to disk, the 2 are not very comparable.

Atlas persists to disk too. Netflix stores trillions of data points in it.

It stores recent data in memory for increased performance which is replicated across instances and then persists to S3 for long term storage, making aggregates queryable and full resolution data available with a delay for a restore from storage.