Welcome to FIXSIM

FIXSIM is the industry-leading, web-based FIX Protocol testing and simulation platform designed to streamline the integration, certification, and stress-testing of your FIX-enabled applications.

Whether you are developing a new Order/Execution Management System (OMS/EMS), integrating with a broker/dealer, or certifying an exchange API, FIXSIM provides a robust, high-performance environment accessible directly from your browser—no local installations required.

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What you'll find here

• Getting Started - connect your FIX engine to FIXSIM.
• Configuring FIX Sessions - mirror your production connectivity.
• Sending & Receiving - order flows and message logs.
• Rules & Automation - simulate venue behavior.
• Troubleshooting - common connection and sequence issues.
• Reference - links to tutorials and sample messages.