The Fastest Open Source FIX Fix8 Community Edition is the fastest C++ Open Source FIX framework. For the same message, Fix8 can significantly reduce encode and decode latency in your application. See Performance. Want even faster? check out the performance of Fix8Pro.

Built-in testing Fix8 contains a built-in unit test framework. We are continually adding and revising our test cases. You can add your own. Fix8 also has a metadata driven test harness that can be scripted to support captured or canned data playback.

Supports any FIX version Fix8 supports standard FIX4.X to FIX5.X and FIXT1.X. If you have a custom FIX variant Fix8 can use that instead. Multiple FIX variants can be used in the same application. New FIX versions will be supported.





Linux, OSX and Windows Fix8 runs on industry standard Linux on IA32, x86-64, Itanium, PowerPC and ARMv7. Other *NIX variants may work too. Fix8 also runs on OSX and Windows 32/64.

Components and groups Fix8 statically supports nested components and repeating groups to any depth. The Fix8 compiler and runtime library take the pain out of using repeating groups.





High performance Fix8 is fast. On typical hardware, client NewOrderSingle encode latency is now 1.38µs, and ExecutionReport decode 3.75µs. See Performance.

FIX Functionality Fix8 supports field and value domain validation, mandatory/optional field assertion, field ordering, well-formedness testing, retransmission and standard session semantics.