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


Understanding FIX drop copy in financial trading

10 July, 2024

In the fast-paced world of financial trading, maintaining a high level of transparency and control over transactions is crucial. One key technology ...

OnixS .NET FIX Engine vs QuickFIXn performance comparison - updated

12 June, 2024

The OnixS FIX Engine SDKs include reference implementation source code samples that are an aid for developers to quickly get familiar with, and then ...

Difference between CME iLink 2 and iLink 3

6 June, 2024

The CME's iLink protocol is crucial for order entry and management in financial trading. Understanding the differences between iLink 2 and iLink 3 ...

Detecting TCP congestion using OnixS FIX Engine and Trading Handler SDKs

14 May, 2024

OnixS Support receive questions and issues related to TCP network congestion so have written up an informational article of this complex area.

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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