[ChristianBundy]

Yeah, protobuf requires that both parties agree on a schema whereas CBOR is self-describing like XML or JSON.

[JoshTriplett]

CBOR also has a schema format, but yes, it's typically used schemaless.

[boardwaalk]

I hadn't heard of this, so I had to look it up: https://tools.ietf.org/html/rfc8610