A fast and easy-to-use C++ microframework for creating HTTP and WebSocket web services.
Crow is a C++ microframework for creating fast and scalable HTTP and WebSocket web services. It provides an easy-to-use routing system similar to Python's Flask, enabling developers to quickly build APIs and real-time applications with minimal boilerplate. The framework is designed for high performance, often exceeding other C++ and non-C++ solutions in speed benchmarks.
C++ developers building web services, REST APIs, or real-time applications who value performance and simplicity. It's ideal for those familiar with Flask-like routing who want to leverage C++'s speed without sacrificing developer experience.
Developers choose Crow for its combination of Flask-inspired ease of use and C++-level performance. Its header-only design, type-safe handlers, and built-in JSON support reduce setup time and errors, while benchmarks demonstrate its speed advantage over alternatives.
A Fast and Easy to use microframework for the web.
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The routing syntax is directly inspired by Python's Flask, making API endpoint definition straightforward and reducing boilerplate code, as shown in the Hello World example.
URL parameters are type-checked at compile time, preventing runtime errors; the README includes an example where mismatched handler types cause a compile error.
Benchmarks linked in the README demonstrate that Crow outperforms other C++ and non-C++ frameworks, leveraging C++'s efficiency for high-speed web services.
Available as a single header file, Crow simplifies project integration without complex build systems, reducing dependency management overhead.
The README explicitly notes that async support and HTTP/2 support are still in development, limiting its suitability for modern web applications requiring these features.
Relies on C++11/14 features, which may not be supported in all environments and can be a barrier for developers unfamiliar with modern C++ standards.
As a C++ microframework, it has a smaller community and fewer pre-built extensions compared to more established web frameworks in languages like Python or Node.js.