Free, Fast, Native.
The best FIX Engine for .NET
QuickFIX/n implements the FIX protocol on .NET.
QuickFIX/n is 100% free and open source with a liberal license.
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To get started, visit the downloads page, take the tutorial, or examine some example applications.
Commercial support provided by Connamara Systems.
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FIX is an electronic messaging protocol for financial transactions. The Financial Information eXchange (FIX) is an open, widely used industry standard. More information is available on the FIX protocol website.