Arcjet is a technology company.
Arcjet has raised $13.0M across 2 funding rounds.
Arcjet has raised $13.0M in total across 2 funding rounds.
Arcjet has raised $13.0M in total across 2 funding rounds.
Arcjet's investors include Andreessen Horowitz, Hoxton Ventures, Next47, S28 Capital, Seedcamp, Shield Capital, Speedinvest, Y Combinator, Jonathan Siegel, Michael Stoppelman, Nitay Joffe, Ott Kaukver.
Arcjet is a developer-first security platform that embeds protections like bot detection, rate limiting, email validation, and form spam prevention directly into application code, allowing developers to ship security features in just a few lines.[3][1][2] It serves developers and businesses building modern, distributed apps—especially those running on the edge—solving problems like AI-driven cyberattacks, malicious bots, aggressive web scraping, automated fraud, and inventory-hoarding attacks that traditional perimeter-based tools miss due to lacking user or business context.[1][2][3] With thousands of customers and several thousand new users monthly, Arcjet shows strong growth momentum, backed by $12 million in total funding including an $8.3 million Series A led by Plural in 2025.[1][2]
Arcjet was founded by David Mytton, a repeat entrepreneur and proven developer advocate based in London with 15 years of experience there before relocating to the US to target its largest market.[1] Mytton previously founded SaaS infrastructure monitoring platform Server Density in 2009, scaling it successfully before selling to US cybersecurity firm StackPath in 2018, which gave him expertise in building traction, scaling software companies, and exiting.[1] The idea for Arcjet emerged from gaps in existing security for distributed, edge-deployed apps facing new AI and bot threats, where developers previously built imperfect, resource-intensive protections in-house; Arcjet simplifies this by embedding context-aware defenses directly in code.[1][2] Early traction was rapid, with thousands of live websites now protected and several thousand sign-ups per month, validating its developer-centric approach.[1][2]
Arcjet rides the surge in AI-driven cyberattacks and bot proliferation, where automated threats like web scraping drain bandwidth and fraud bots disrupt e-commerce by faking out-of-stock inventory—issues exploding with edge computing and distributed apps beyond centralized servers.[1][2] Timing is ideal post-2025 funding boom, as legacy network-edge security fails against AI-speed innovation, forcing devs to improvise; Arcjet's code-native approach aligns with developer workflows in a serverless/edge era, positioning it as the "next Cloudflare" for this cybersecurity shift.[1] It influences the ecosystem by empowering dev teams to self-protect without security silos, accelerating secure app deployment amid rising AI threats and reducing reliance on imperfect perimeter defenses.[1][2]
Arcjet is primed to scale as AI threats evolve, leveraging its Series A to expand in-code tools for emerging vectors like sophisticated bots, potentially dominating developer security like Cloudflare did for infrastructure.[1][2] Trends like edge proliferation and AI innovation will fuel demand, with Mytton's US move and investor network (e.g., a16z, Twilio ex-CTO) enabling global enterprise wins. Influence may grow via deeper ecosystem integrations, setting a new standard for context-aware, dev-native protection—transforming how businesses safeguard against tomorrow's attacks while Arcjet cements its role at the forefront of modern cybersecurity.[1][2]
Arcjet has raised $13.0M across 2 funding rounds. Most recently, it raised $9.0M Series A in October 2025.
| Date | Round | Lead Investors | Other Investors |
|---|---|---|---|
| Oct 1, 2025 | $9.0M Series A | Andreessen Horowitz, Hoxton Ventures, Next47, S28 Capital, Seedcamp, Shield Capital, Speedinvest, Y Combinator, Jonathan Siegel, Michael Stoppelman, Nitay Joffe, Ott Kaukver, Shane Curran | |
| Sep 1, 2024 | $4.0M Seed | Accel, Andreessen Horowitz, B Capital Group, Fellows Fund, Greylock, Hoxton Ventures, Next47, Oren Yunger, Obvious Ventures, Rebel Fund, REMUS Capital, Roble Ventures, S28 Capital, Sapphire Ventures, Seedcamp, Shield Capital, Signal Peak Ventures, Silicon Valley Connect, Team8, Tekton Ventures, TY, WndrCo LLC, Y Combinator, Alice Lloyd George, Arash Ferdowsi, Drew Houston, George Hu, James Isilay, Jonathan Siegel, Michael Stoppelman, Nitay Joffe, Ott Kaukver, Peter Kazanjy, Shane Curran, Tom Blomfield, Wayne Crosby |