Arcjet
Arcjet is a cybersecurity company in United States, founded in 2024. It has raised $11.9M across 2 rounds, most recently an $8.3M Series A in October 2025.
Ship secure agents. Not security incidents.
- Employees
- 1–10
- Founded
- 2024
- Business Model
- B2B
- Website
- arcjet.com
- Total Funding
- $11.9M
- Last Round
- $8.3M Series AOct 2025
- Rounds
- 2
Totals include recorded grants and other qualifying funding, not just equity. What counts toward funding.
Indexed holds 2 funding rounds and 3 investors for this company. The full record is or through the API.
About
Arcjet is a developer-first security platform that embeds runtime protection directly into application code. It provides a suite of composable security components including bot detection, rate limiting, email validation, form spam prevention, PII detection, and WAF-style attack protection. Arcjet integrates natively with Next.js, Node.js, Bun, SvelteKit, and modern deployment platforms like Vercel and Netlify. Its local-first, WebAssembly-powered engine evaluates security policies inline within the application without adding network latency. The platform has expanded into AI security with AI budget controls, tool authorization for AI agents, and prompt injection protection. Arcjet raised seed funding from Andreessen Horowitz in September 2024.
Summary
It lists 1–10 employees. It has raised $11.9M in total across 2 rounds, most recently a $8.3M Series A round in Oct 2025. Investors include Plural, Andreessen Horowitz and Seedcamp.
Tech & App Stack
9 technologies & apps tracked
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Funding History
Oct 2025
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Funding: Seed through Series A. Amounts, valuations, and investors where available.
Investors
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