What is gRPC ?

gRPC, which stands for "Google Remote Procedure Call," is an open-source framework for enabling efficient communication and data exchange between applications and services. It was developed by Google and is designed to make it easier for different components of distributed systems to communicate with each other, regardless of the programming languages they are written in or the platforms they run on.

Here are some key features and concepts of gRPC:

Remote Procedure Call (RPC):

gRPC is based on the concept of Remote Procedure Calls, where one application or service can call functions or methods on another application or service as if they were local, without the developer needing to manage the low-level details of network communication.

Protocol Buffers (Protobuf): gRPC uses Protocol Buffers as its interface definition language (IDL) for defining the structure of data that is exchanged between services. Protocol Buffers offer a compact, efficient, and language-neutral way to serialize structured data, making it ideal for communication between different services.

HTTP/2: gRPC uses HTTP/2 as its underlying transport protocol. HTTP/2 provides features like multiplexing, header compression, and bidirectional communication, which can result in more efficient and faster communication compared to its predecessor, HTTP/1.1.

Language-Agnostic: gRPC supports multiple programming languages, allowing you to generate client and server code in a variety of languages, including but not limited to C++, Java, Python, Go, C#, PHP, NodeJS and more. This means that services written in different languages can seamlessly communicate with each other.

Streaming: gRPC supports both unary RPCs (request-response) and bidirectional streaming, enabling more flexible communication patterns. This is especially useful for building real-time and interactive applications.

Middleware: gRPC provides support for middleware features like authentication, load balancing, and error handling, making it easier to implement cross-cutting concerns in your distributed systems.

Code Generation: gRPC allows you to generate client and server code from your service definitions (defined in Protobuf), reducing the amount of boilerplate code you need to write.

Support for Different Environments: gRPC can be used in various environments, including server-to-server communication, mobile devices, web browsers (via gRPC-Web), and more.


gRPC is often used in microservices architectures, where it facilitates communication between individual services in a scalable and efficient manner. It is also used in various other distributed systems scenarios, such as IoT applications, cloud-native applications, and real-time communication systems. Its efficiency, language support, and robust features make it a popular choice for building modern distributed applications.