Primer

London-based payments infrastructure provider Primer has closed an oversubscribed $100 million (£75 million) Series C funding round led by Sofina, bringing its total funding raised to date to $170 million.

Summary of transaction details:

• Value: $100 million (£75 million)
• Sector: Fintech / Payments Infrastructure / AI
• Advisor: Not disclosed
• Key Entities: Target: Primer; Lead Investor: Sofina; Participating Investors: Peak XV Partners, Balderton Capital, Accel, ICONIQ, Tencent, Speedinvest; Key Executive: Gabriel Le Roux (CEO & Co-Founder).
• Location: London, UK (with offices in New York and Singapore)

Note: Founded in 2020 by former Braintree and PayPal leaders, Primer provides a single, unified infrastructure layer that consolidates fragmented payment processors, acquirers, fraud tools, and payment methods into a single platform. The system captures over 400 data points per transaction, processing billions in volume annually for major global brands like GetYourGuide, Dialpad, and Printful. This Series C capital will fund the enhancement of Primer's proprietary AI agent, Primer Companion, moving it from an advisory tool to one capable of autonomously optimizing payment flows. The funding will also accelerate Primer's US expansion, where the firm intends to grow regional revenue to over a third of its total business by 2028 and hire up to 50 local roles.