Protocol Buffers has evolved over two decades, transitioning from a performance-critical internal tool at Google to the default wire format for distributed systems. The Editions page traces that history release by release.
While the core philosophy has remained constant, the ecosystem has grown to support more platforms and complex engineering needs.
These open-source projects publish their Protobuf definitions in the open, but they are a small sample. Protobuf underpins internal APIs at companies of every size, and most of those schemas never leave private repositories.
Protobuf schemas can define services as well as messages, and an RPC framework turns those definitions into working clients and servers. There are only two you need to know: gRPC and ConnectRPC.
If Protocol Buffers define the exact shape of your data, gRPC is the high-performance framework that uses those definitions to automatically generate the networking code for transmitting those messages between services.
Visit SiteConnectRPC is a lightweight framework that uses Protocol Buffers to automatically generate type-safe APIs capable of natively communicating over standard HTTP, gRPC, and gRPC-Web from a single implementation.
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