Trader Voice


The industry's voice trading engine

Cloud9 (now part of Symphony) is the leading cloud voice platform for financial markets and the only institutionally compliant voice trading platform purpose-built for high-touch communication between traders and their counterparties. It meets the complex needs of users from the largest global banks to specialist trading firms, from regulated users on the trading floor through to the middle and back office.

Designed to support a distributed workforce, users have access to full voice trading functionality, call recording and fully encrypted trader voice services.

Symphony + Cloud9

Pairing Symphony’s core collaboration and platform capabilities with high-quality trader voice communications will create unmatched combined capabilities for trader workflows and unlock innovative workflow and data analytics solutions.

Voice Solutions


The C9Trader Stratus interface combines both traditional turret functionality with new, innovative, and customizable features to deliver a unified user experience across both hardware and software interfaces.

Traders can customize content to their unique requirements and complex workflows in a logical way – allowing them to instantly connect with any global trading partner – anywhere, anytime.


With a full suite of voice trader capabilities, the CloudHub is a low-cost legacy replacement that provides an unrivaled audio experience, with key features such as a physical dial pad, audio device management and high-quality built-in audio speakers. The accessory hardware includes a high-quality microphone with an active call indicator light as well as support for two handsets.

Voice APIs

Cloud9’s state-of-the-art APIs deliver seamless connectivity to our customer’s networks of financial technology partners. APIs provide both clients and technology providers unparalleled flexibility and access to key C9 services and data, and as a result, drive enhanced productivity across the industry.

Voice Data

The Cloud9 workflow collects, structures and delivers the industry’s most superior trader voice data. This empowers firms to accurately capture voice information for an expansive view of intelligence for market participants across the enterprise.


From our blog


Introducing Symphony’s Technical Advisory Group

Since Symphony’s earliest days as a company, we have collaborated closely with our customers to ensure that our product both addresses their challenges and meets their needs. In that spirit of collaboration and in conjunction with Symphony’s board of directors, we recently formed a Technical Advisory Group (TAG) as a forum to discuss perspectives on technology with our customers and help to inform Symphony’s go-forward strategy. At its outset, the group committed to meeting twice a year to share knowledge and experience regarding technology trends and related Symphony initiatives, as well as to ensure that our development strategy aligns with our customers’ visions.


In Praise of Standardisation

Over the last 20 years, ops has reinvented itself for the better, faster, and cheaper, as well as vastly improved its interoperability with the rest of the financial ecosystem.

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