London keeps producing some of Europe’s largest funding rounds, and the past few weeks were no exception. Here are the deals worth knowing about, from a fresh seed round to one of the biggest AI raises the continent has seen.
Archestra.AI raises $10m to put guardrails around enterprise AI agents
London-based Archestra.AI announced a $10m seed round on 2 June 2026, led by 20VC, taking total funding to $13.5m. Founded in 2025 by former Grafana Labs engineers, the company lets large firms connect sensitive data to AI agents without leaks, and already counts four Fortune 500 clients. It is a tidy example of the security-for-AI niche that London founders are moving into quickly. Read the story on Tech.eu.
Primer closes a $100m Series C for AI-driven payments
London payments infrastructure firm Primer raised a $100m Series C on 20 May 2026, led by Sofina, bringing total funding to $170m. The money backs its Primer Companion AI agent and a push into the United States, with the founders betting that most large-business payment decisions will soon be initiated or audited by AI. For London’s fintech cluster it is another sign that payments and AI are converging fast. See the details.
UCL spinouts pull in two of Europe’s largest AI rounds
UCL said on 28 April 2026 that two startups founded by its researchers had raised a combined $1.6bn. Ineffable Intelligence, founded by Professor David Silver, took $1.1bn in seed funding at a $5.1bn valuation with backers including Sequoia, Lightspeed and NVIDIA, while Recursive Superintelligence, co-founded by Professor Tim Rocktaschel, is raising around $500m. It cements London’s standing as a serious centre for frontier AI research. Read the UCL announcement.
Related guides
- SEIS and EIS Explained: How UK Startups Raise Tax-Advantaged Funding
- How to Raise Pre-Seed Funding in the UK: A Founder’s Step-by-Step Guide
- SEIS Advance Assurance: How to Apply and What HMRC Wants to See
- How to Raise a Seed Round in London: What Investors Expect in 2026
- From Seed to Series A: What UK Startups Need to Hit Before the Raise