Arcjet, a developer-first security platform that embeds defences directly into code, has raised $8.3m in Series A funding to combat the surge in AI-powered cyberattacks and malicious bots.
The round brings the company’s total funding to $12m and will speed up the rollout of its in-code security technology for modern applications.
The funding round was led by Plural and Ott Kaukver, former CTO of Twilio and Checkout.com, with participation from Andreessen Horowitz, Seedcamp, and new investors Jeff Lawson and Feross Aboukhadijeh.
Arcjet builds AI-powered security tools that allow developers to detect and block threats within their codebase, rather than at the network edge. This approach helps defend against malicious bots, automated fraud, and scraping attacks that traditional perimeter-based tools can miss.
Arcjet founder and CEO David Mytton said, “Legacy security tools – designed for a pre-AI era and operating at the network perimeter – see packets, not users or business context.
“They can’t provide the deep, granular level of protection needed to distinguish valuable AI traffic from genuine threats or respond at the pace of AI innovation. As a result, developers are left with security approaches that lack application & business context, slowing release cycles and creating costly false positives while missing sophisticated attacks.”
Plural partner Sten Tamkivi said, “David is an exceptional repeat founder who combines deep technical expertise with a rare understanding of developers’ needs. The traction and credibility that Arcjet has built within a fairly short period of time is really remarkable – thousands of live websites now trust Arcjet to protect them from potentially existential threats. At Plural, we back serious founders who execute with pace and conviction. David and his team are doing exactly that.”
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