Primer's $100M Series C: London Payments Infra Bets the US Wants Autonomous AI Checkout
Primer raised $100M Series C from Sofina and Peak XV to scale AI-native payments — US ARR doubling YoY as autonomous finance ops go mainstream.
Payments teams still run experiments in spreadsheets. Primer raised $100M to let AI run them.
What Primer sells
Payments and checkout infrastructure with an AI layer — routing, retries, tokenization, and now AI Companion for autonomous optimization across merchant finance stacks.
Why the US matters
Primer already sees ~20% of revenue from the US with US ARR doubling YoY. This round is explicitly US GTM fuel, not European comfort money.
Investor bench
Sofina, Peak XV, Balderton, Accel, ICONIQ, Tencent, Speedinvest — ~€146.6M total raised across rounds.
Practical takeaway
Founders: Payments infra wins on authorization rates and cost per transaction, not dashboards. Investors: Cross-border payments AI is a winner-take-most category if you nail enterprise reliability.
Sources
- The Next Web: https://thenextweb.com/news/primer-secures-100m-series-c-autonomous-ai-payments
- Axios Pro Rata: https://www.axios.com/pro/all-deals/2026/05/20/pro-rata-premium-first-look
Editorial note: AI tools assisted with research, structure, or drafting. Venture Capital Tracker retains human editorial responsibility for factual accuracy, relevance, and source quality before publication.
