The funding round was backed by Skyscanner co-founder Gareth Williams alongside Scottish Enterprise and Equity Gap.
"This is hugely exciting news and is a change of trajectory from our original, more modest ambitions – we are now set on the path for Boundary to become a top-tier European home security business. To have someone with the calibre of Gareth giving our product his backing and mentorship is incredible; we have massive plans for the future."
British Design Fund backs London-based Koalaa as the prosthetics maker expands its manufacturing capacity and international reach.
"We’re delighted to have the backing of British Design Fund and look forward to working with them as we scale-up and expand our operations in the UK, but also begin entering new markets across the world."
March Capital led the Series C round, which values the enterprise security firm at $500m and brings total funding to over $120m.
"The security of our operations and data is paramount to the success of Arm, and we’re committed to empowering our people to make sound security decisions while doing their jobs effectively. The concept of human layer security is becoming a critical part of doing business today. Tessian enables us to reduce risk across the organization by providing valuable tools and knowledge to not only stop threats like advanced phishing attacks and accidental data loss, but also continually improve the security behaviors of our teams as the threat landscape evolves."
The oversubscribed round was backed by investors including Sumerian Foundation and Wealth Club.
"We’ve been blown away by the level of interest in the funding round. We quickly raised £1m from existing investors – both domestically and abroad – which was a real vote of confidence in our model – and we made up the additional £1.5m in just ten days."