Skip to content


Switch branches/tags

Name already in use

A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?

Latest commit


Git stats


Failed to load latest commit information.
Latest commit message
Commit time


Philadelphia is a fast Financial Information Exchange (FIX) protocol library for the JVM.

You can use Philadelphia to connect to stock exchanges, brokerage firms, and other network endpoints that use the FIX protocol. You can also use it to provide your own services using the FIX protocol.

Philadelphia is designed to exhibit low and predictable latency. To achieve this, it supports non-blocking networking and does not allocate memory on message reception or transmission.

Philadelphia requires Java Runtime Environment (JRE) 8 or newer.


See the latest release on GitHub.


Philadelphia contains the following libraries:

See the FIX Trading Community for the protocol specifications.

Philadelphia contains the following applications:

  • Terminal Client is a simple console application for interacting with a FIX acceptor.

  • Code Generator is a simple console application for generating profiles for FIX dialects.

Philadelphia contains the following example applications:

Philadelphia contains the following test applications:

  • Performance Test contains microbenchmarks for the FIX protocol implementation.

See Philadelphia Extras for additional extensions.


For more information on Philadelphia:


Copyright 2015 Philadelphia authors.

Released under the Apache License, Version 2.0. See LICENSE.txt for details.