CapVest-backed Datasite acquires Firmex with support from GCS

GCS (formerly GRAPH Strategy) is pleased to have provided Commercial Due Diligence to CapVest Partners and its portfolio company Datasite on Datasite’s acquisition of Firmex, a Toronto-based virtual data room and secure file-sharing platform serving the global lower mid-market.

The transaction builds on GCS’s previous work supporting CapVest’s original acquisition of Datasite, further extending the firm’s partnership as Datasite continues to scale globally.

Founded in 2006, Firmex provides secure document-sharing technology to over 120,000 organisations worldwide, combining enterprise-grade security with simplicity and speed for dealmakers, advisors, and corporate clients.

The acquisition supports Datasite’s strategy to expand its SaaS offering across the full M&A lifecycle and strengthen its position in adjacent markets, including loan syndication, fundraising, and compliance workflows. It also complements Datasite’s international growth under CapVest’s ownership, adding a high-recurring-revenue, subscription-based business with a strong foothold in the North American mid-market.

GCS’s work focused on assessing Firmex’s market positioning, customer base, competitive differentiation, and growth potential within the global virtual data room and secure collaboration software landscape.

The GCS team on the transaction was led by James Tetherton and Phil Craig.