EXA Express (formerly GTT Express, Hibernia Express) is a 4,600 km and 6-pair Trans-Atlantic submarine cable system linking Canada and the United Kingdom. Project Express is built with the state-of-the-art submarine network technology, specifically designed for the financial community stretching from North America to Europe. EXA Express offers the lowest latency route from New York to London with 58.55ms round trip delay.

Hibernia Express initially designed with 100 Gbps transmission capacity using TE SubCom’s C100 SLTE platform. It is a 6-fiber-pair submarine cable, with a portion of the fibers optimized for lowest latency and a portion optimized for 100x100 Gbps design capacity. The total cross-sectional design capacity of the Express cable is over 53 Tbps.

Hibernia Express was ready for service on September 15, 2015.

Hibernia Express was privately-owned by Hibernia Atlantic, and form a part of Hibernia Atlantic's Global Financial Network which is specifically designed to meet the demanding performance and reliability requirements of the financial community.

In Jan. 2017, GTT completed the acquisition of Hibernia Networks which includes five subsea cables, including Hibernia Express, the lowest latency transatlantic cable system, eight cable landing stations, etc.

In September 2021, I Squared Capital, an infrastructure private equity firm, acquired GTT's Communications’ infrastructure division for an initial $1.74bn in cash, and renamed the newly independent operating company EXA Infrastructure. The GTT Express, as part of assets covered by the acquisition, is now renamed as EXA Express. So does GTT Atlantic to EXA Atlantic, comprising EXA South and EXA North.