Arcjet
Verdict: A security SDK you call inside your app code, now with custom-trained models that catch prompt injection, check AI agent tool calls, redact personal data and block bots before an action happens.
Fit Developer
Levels show who gets value from it — many tools work for both beginners and experts.
🚀 Getting started: Sign up at console.arcjet.com, install the SDK for your framework, wrap one risky route or agent tool call with protect(), and watch the decisions in the dashboard.
✅ Good fit if you build an app or agent with an LLM in it and want guardrails in code instead of a separate firewall.
⛔ Not for you if you do not write code, or you only need a simple website contact form protected.
The score rates quality; this box tells you whether it suits you. How to read it
15-day free trial, then a free plan capped at 10,000 requests/month; Individual $25/month, Startup $299/month, plus usage ($50 per 1M agent requests) · Official site: https://arcjet.com/ · source checked (HTTP 200)
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Arcjet FAQ
Is Arcjet free?
Yes, there is a free option. Pricing as we found it: 15-day free trial, then a free plan capped at 10,000 requests/month; Individual $25/month, Startup $299/month, plus usage ($50 per 1M agent requests) (checked 2026-11-10).
Who is Arcjet best for?
Arcjet is a good fit if you build an app or agent with an LLM in it and want guardrails in code instead of a separate firewall. It is not for you if you do not write code, or you only need a simple website contact form protected. Level: Developer.
What are good alternatives to Arcjet?
The highest-scored alternatives in vibe coding on AI Agent Ideas are GitHub Copilot (8.7/10), Lovable (8.6/10), v0 by Vercel (8.6/10) and Cursor (8.4/10).
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