FIXSIM
FIXSIM FAQ — FIX Protocol Simulator Questions & Answers
Common questions about FIXSIM, a web-based FIX protocol simulator used by broker-dealers, OMS/EMS vendors, buy-side firms, and fintech teams to test FIX connectivity and validate trading workflows. Topics covered include supported FIX versions, session and application layer testing, automated regression testing via Rule Builder and REST API, pricing and subscription options, and how to get started with a free trial. FIXSIM has been in production since 2012 and requires no software installation.
Frequently Asked Questions
Chat with us about our pricing plans that fit your needs. We work with individual consultants to the worlds largest broker/dealers and investment managers. We have plans to fit your budget.
We launched FIXSIM in 2013 currently have clients around the globe. From independent contractors to large FinTech firms, we have plans to fit your needs.
We can support any version of FIX, but most production systems use FIX 4.4, 4.2, or 4.0. We support all versions from 4.0 through 5.0 and it's service packs.
Sure! You can reach out to us and we'd be happy to schedule a demo.
FIXSIM can handle custom tags on both incoming and outgoing messages. If you have questions or need customizations, we're happy to work with your requirements.
Yes! We allow you to directly target a simualted Bloomberg session.
Yes, our professional plans have our Rule Builder, which allows you to define behavoirs on how FIXSIM should respond to messages received.
No, we are a SaaS company. By hosting FIXSIM we are able to deploy, modify, and upgrade our services to provide our customers with an ever improving solution. NO software to download and maintain!
Yes! We provide encrypted TLS 1.2 FIX sessions and our Web application uses it as well.
Yes, FIXSIM has a powerful feature (Raw Messages) which allows a user to copy/paste a valid FIX message into your target session. FIXSIM will automatically recalculate checksum, body length, etc and also update the CompIDs and sequence numbers and more. Incredibly powerful feature to troubleshoot production issues.
We recommend validating message workflows before connecting to a venue.
Read the practical testing workflow
