FIX Engine and Direct Market Access
SDK Solutions

for mission critical trading infrastructure and application frameworks

OnixS Specialist Software

We provide Direct Market Access (DMA) Software Development Kits (SDKs) for mission critical trading infrastructure and application frameworks. Our SDKs are fully supported and designed to enable developers to quickly integrate market data feeds, order entry APIs, and post trade feeds into trading and application frameworks.


Our Products

directConnect Expand / collapse

A suite of venue specific calibrated and certified native protocol and FIX protocol Market Data Handler, Order Routing, Trade Capture and Drop Copy SDK solutions.

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FIX Engines Expand / collapse

Our FIX Engine products are ultra low latency FIX Protocol .NET / C#, C++ and Java SDK implementations to FIX-enable applications and execution/order management systems.

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FIX Dictionary & Tools Expand / collapse

We offer the FIX Dictionary for FIX Protocol reference, the OnixS FIX Analyser for the development and operational support of FIX Protocol messaging infrastructure, and online references on using FIX with SBE, FIXP and FIXT.

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Why choose OnixS?

OnixS provides easy to use Direct Market Access (DMA) SDK solutions enabling proprietary trading groups, commodity and energy trading firms, application ISVs, investment banks and exchanges to save time and money in the build and ongoing maintenance of trading systems and application frameworks

  • Offered on a low-cost fully-supported subscription basis

  • High-performance multi-platform implementations

  • Minimises the cost of deploying critical trading infrastructure

  • Fast-start to FIX-enable trading, order management and risk management systems

Insights : OnixS

News, views and technical updates from across the industry


A brief history of CME Globex

14 July, 2022

CME Globex, which started operation in 1992, is a global electronic trading platform used for futures, options, and commodities trading across ...

What are the benefits of using FIX API in the trading process?

16 June, 2022

FIX, or Financial Information Exchange is a high-grade electronic communication process that helps real-time traders exchange information related to ...

Understanding Direct Market Access (DMA)

26 May, 2022

For those trading in the stock market, the term direct market access trading is a common one. DMA refers to electronic trading where the investors ...

ITCH Protocol: Understanding Origins, Industry Context, Usage, and Updates to the ITCH Protocol

15 December, 2021

As Nasdaq migrates from the Nasdaq OMX Genium INET, to the new Nasdaq Financial Framework (NFF) platform across all Nasdaq's U.S. and European ...

Technical Guide: .NET Core FIX Engine SDK with one million FIX messages and zero Garbage Collection

8 December, 2021

Garbage Collection(GC) induced latency in trading applications can be a major problem. OnixS shows how to measure the GC load of the OnixS FIX Engine ...

Release Notes

The OnixS Release Notes are detailed descriptions of new features, improvements and bug fix releases for all OnixS products that are published via an email list server, Twitter, RSS feed and on the web.

We recommend listenning to these Release Note updates via your preferred mechanism(s).


Free 30 day evaluation

Our objective is to provide you with ready to use evaluation SDK download distributions for market access solutions that are specific to your target venue and code base.

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