The Rapid were the last to be planned of the original six clubs in the NSL. With the league struggling to reach six franchises signing-on by the spring 2024 deadline which had been set by the other franchise owners, league CEO
Diana Matheson and co-founder Thomas Gilbert leveraged their equity in the league in order to create a club in Ottawa. The club's existence was first disseminated at the
espnW Summit in May 2024, where it and
Montréal were described as the last two of the league's six charter clubs. Details were initially scant, with Matheson implying its development was behind the other five clubs. The club's formal unveiling took place at a
press conference at
TD Place Stadium on 15 August, where their corporate leadership, branding, and venue were detailed for the first time. On September 17, 2025, following a 2–1 win over
Calgary Wild FC, the Rapid secured a spot in the inaugural NSL playoffs. Ottawa was eliminated in the semifinal by
Vancouver Rise FC. On March 6, 2026, it was announced that Arcadia MapleLeaf Soccer had become majority owners of the Rapid, increasing investment into the club, and with Nick Sakellariadis being named as Chair. == Identity ==