Super tricky and not applicable in all circumstances. GCP and AWS must move towards sane traffic pricing (or risk anti-monopoly lawsuits). The licensing changes are just a first step.

P.S. : offtopic... can i use privatelink between AWS and Google Cloud ? do you have an idea on how much it would cost on either side ?

You basically have to hookup Cloud Provider A through a middle layer to Cloud Provider B (e.g., connect via Equinix or Megaport). It’s not drastically different than a hybrid setup, except you don’t control the premises on either side.

While getting you the right link to our Partner Interconnect docs, it turns out we have a nice solution guide writing up the various options [1].

The costs boil down to some non-trivial fixed price each month to cover the 1/10/100+ Gbps connection on each side, plus whatever transfer fees each provider charges for egress over that method. At large enough volumes, providers of all sorts usually have equivalent fixed prices. Getting multiple redundant lines, or doing VPN encryption, obviously costs more and is more work than “just a pipe”.

Even at list prices though, this gets you closer to $.02/GB each way in Europe or North America. At high volume in the same metro area (like Northern Virginia), you can easily agree to much lower rates on either side.

[1] https://cloud.google.com/solutions/patterns-for-connecting-o...

> If the VPCs in the VPC peering connection are within the same region, the charges for transferring data within the VPC peering connection are the same as the charges for transferring data across Availability Zones. If the VPCs are in different regions, inter-region data transfer costs apply.

There is no additional cost

I checked with a couple of people and they read the above to mean that any peering data transfer costs the SAME as if you were transferring data across availability zones. This is not free.

Inter region transfer is a different tier