Primer Raises $100M Series C to Bring AI to Every Payment — Founded by Former Braintree/PayPal Leaders

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London-based Primer closed a $100M Series C to apply AI across every merchant payment, from fraud detection to routing optimization. Founded by former Braintree and PayPal leaders, Primer is building an AI-first payment infrastructure layer that sits between merchants and payment processors. The round signals continued investor confidence in AI applied to financial infrastructure despite market uncertainty.