UK Primer Raises €86.2M Series C Round Led by Sofina

Founded in 2020 by former leaders of Braintree and PayPal, Primer provides a unified platform that helps finance and payments teams simplify operations, improve performance, and increase revenue from a single system. The company has now raised a total of €146.6 million ($170 million).

Primer says modern payments systems are highly fragmented across processors, acquirers and fraud tools, leaving businesses without a complete view of their data. This fragmentation becomes even more critical as companies adopt AI, increasing the risk of inaccurate or incomplete decision-making.

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To address this, Primer built a single infrastructure layer covering the full payments lifecycle, capturing over 400 data points per transaction and processing the majority of merchant payment volume through its platform. It works with global customers including GetYourGuide, Dialpad, and Printfu.

The company is now expanding its AI capabilities through its product “Primer Companion,” which helps users analyse payment data, answer complex queries, and optimise performance. It is evolving toward an autonomous system that can run experiments and execute optimisations within defined business rules.

With strong traction in the US now contributing around 20% of revenue Primer plans to scale its presence further, targeting over one-third of revenue from the region by 2028 and hiring up to 50 new employees to support growth.

“In the next few years, every payment decision in a large business will be initiated, optimised, or audited by AI. That shift is already underway. The question is whether the data those systems run on is complete because when you deploy agents across fragmented data, they don’t just underperform, they make the wrong decision. That’s why the next era of payments can only be built on complete, contextual intelligence. And that’s what Primer delivers,” said Gabriel Le Roux, CEO and co-founder of Primer.