Arcjet raises $8.3m to fight AI-driven cyberattacks

Arcjet, a developer-first security platform that embeds protection directly into code, has raised $8.3m in Series A funding to help developers tackle the rising wave of AI-powered cyberattacks and malicious bots.

The latest round brings the company’s total funding to $12m and will accelerate the development of its in-code security platform designed for modern applications.

The round was led by Plural and Ott Kaukver, former CTO of Twilio and Checkout.com, with participation from existing investors Andreessen Horowitz and Seedcamp. New strategic investors joining the round include Jeff Lawson, former CEO of Twilio, and Feross Aboukhadijeh, CEO of Socket.

Arcjet provides a native security solution built to protect applications against adaptive, automated threats that exploit AI.

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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