Arcjet is runtime security for AI agents. It puts the decision where the action is: block prompt injection, stop PII leaks, block bots, and add guardrails to tools, APIs, and database calls.
Identity tells you who is asking, but it cannot tell you what happens next. Arcjet runs inside the code that takes the action, so every agent action is observed in the run it belongs to, checked before it executes, and kept as evidence afterwards. Each check returns a decision your code acts on: allow, block, redact, or hold for review.
Arcjet also secures the coding agents your developers use, including Claude Code, Codex, Copilot, and Cursor. It discovers every coding agent across developer endpoints, blocks MCP and API servers that security hasn't approved, and stops credentials from leaving through a file read, a tool call, or an outbound request.
Controls include prompt injection detection, agent tool controls, sensitive information and data loss prevention, token and spend budgets, and coding agent controls, plus Shield WAF, bot detection, email validation, and signup protection for web applications. Engineering can keep rules in code, reviewed and tested like everything else, while security teams change remote policies in real time without a deploy.
There is no gateway, proxy, or sidecar to run. Arcjet is SOC 2 Type II, adds under 1ms of local decision overhead, and offers 20 native SDKs and framework integrations across JavaScript, Python, Go, and AI agent frameworks including LangChain, OpenAI Agents, the Vercel AI SDK, and the Claude Agent SDK.
Average Rating: 4.6/5.0
Total Reviews: 16
Who Is the Company Behind Arcjet?
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Seller: Arcjet
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Company Website:
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Year Founded: 2023
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HQ Location: New York City, New York
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LinkedIn® Page: www.linkedin.com
14 employees on LinkedIn®
Who Uses This Product?
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Top Industries: Computer Software
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Company Size: 81% Small, 6% Large
What Do G2 Reviewers Say About Arcjet?
AI-generated summary from verified user reviews
Pros
- Users value the fine-grained bot and AI traffic controls that integrate seamlessly with Next.js on Vercel.
- Users praise the extensive documentation of Arcjet, facilitating seamless integration with various backends like SvelteKit.
- Users appreciate the documentation quality of Arcjet, making integration with various backends seamless and straightforward.
- Users value the easy integrations of Arcjet, enhancing their experience with seamless connections to Next.js on Vercel.
- Users value the fine-grained bot and AI traffic controls and its seamless integration with Next.js on Vercel.
Cons
- Users note the high price of Arcjet as a significant downside that affects overall value.
