Arcjet

Name: Arcjet
Brand: Arcjet
Price: 25 USD
Rating: 4.6 (16 reviews)

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Real-time AI agent security and policy enforcement

From $25/mo, free trial

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4.6(16 across the web)

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Reviews onG2

16 reviews tracked

The Bottom Line

Updated Sep 21, 2026

Price: From $25/mo, free trial. Compare plans

Key facts

Arcjet enforces security policies at the action level, blocking prompt injection, PII leaks, and unauthorized tool calls in real time.
It provides native SDKs and integrations for major AI agent frameworks and web frameworks, making it easy to add runtime security to existing applications.
The platform offers audit trails and policy enforcement, ensuring that every decision is recorded and can be reviewed for compliance.

Pros

Enforces security at the action boundary, catching issues that other controls miss
Supports a wide range of AI agent frameworks and web frameworks
Provides detailed audit trails for compliance and debugging

Cons

Pricing can be complex with separate usage fees for web and agent requests
Requires integration and setup, which may be a barrier for non-technical users

What is Arcjet?

Editorial review

Arcjet is a runtime security platform designed specifically for AI agents, providing real-time enforcement of security policies at the point of action. It observes every action an agent takes, groups them into runs, and applies security checks, such as prompt injection detection, sensitive data loss prevention, and bot protection, before the action executes. This ensures that unsafe or unauthorized actions are blocked, redacted, or held for review, preventing data exfiltration, cost explosions, and sequence drift. Arcjet integrates natively with popular AI agent frameworks and SDKs, including LangChain, CrewAI, and Vercel AI SDK, as well as web frameworks like Next.js and FastAPI. It offers a developer-friendly approach with code-first setup, a live example, and comprehensive documentation. The platform also provides audit trails and policy enforcement, making it suitable for production workflows where security and compliance are critical.

LCLouis CorneloupUpdated Sep 21, 2026 · how we evaluateSourcearcjet.com ↗

Ratings Across the Web

4.6(16 reviews)

Arcjet holds an aggregate rating of 4.6 out of 5 from 16 reviews across G2, last checked September 21, 2026.

G216 reviews

4.6/5

Ratings aggregated from independent review platforms. Learn more

Key Features

Prompt injection detection on user input, API responses, and tool output
Sensitive data loss prevention (DLP) to stop PII leaks in inputs and outputs
Bot protection and Shield WAF for web applications
Agent tool controls that enforce policies by identity, role, route, and typed input
Real-time decision-making with allow, block, redact, or hold for review actions
Audit trail with decisions, policy versions, and run history
Integration with AI agent frameworks (LangChain, CrewAI, etc.) and web frameworks (Next.js, FastAPI, etc.)
Usage-based pricing with per-request fees for web and agent requests

Pricing Plans

Free Trial

Pricing checked Oct 3, 2026

Arcjet plans and prices, checked October 2026
Plan	Price	Details
Individual	$25 / mo	1 team member 1 hour log retention Email support +1 moreShow less See usage fees
Startup	$299 / mo	2 team members 24 hour log retention Email + Slack support +1 moreShow less See usage fees
Enterprise	Custom	Unlimited team members SIEM export Priority support +1 moreShow less See usage fees

Calculate your cost View full pricing

Is Arcjet worth the price?

Fair value

Arcjet's pricing is reasonable for a niche runtime security tool, but the $25/mo Individual tier offers only 1 hour log retention and no SIEM export, making it expensive for solo users.

The $299/mo Startup tier adds Slack support and 24-hour logs, but usage fees are undisclosed, creating uncertainty. Best for teams already committed to AI agent workflows who need managed enforcement.

Hidden Costs & Gotchas

Only 1 hour log retention on $25/mo tier forces $299/mo upgrade for 24 hours

Team member limit of 1 on Individual, 2 on Startup (no per-seat add-on listed)

How Arcjet's pricing compares

At $25/mo, billing unit not specified, Arcjet is the most affordable of its 4 comparable direct competitors.

Arcjet

$25

$25

$39

$40

$500

Entry paid plan, monthly. Pricing checked Oct 3, 2026.

Reviews

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4.6/5

Across 16 verified user reviews on G2

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Still deciding?

Most buyers shortlist 2 or 3 tools before committing. Pull a side-by-side comparison or browse the full alternatives shortlist below.

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Arcjet FAQ

How does Arcjet enforce security for AI agents?

Arcjet enforces security by observing every action an agent takes, grouping them into runs, and applying security checks—such as prompt injection detection, sensitive data loss prevention, and bot protection—before the action executes. It returns a decision (allow, block, redact, or hold for review) that your code acts on, ensuring unsafe actions are prevented in real time.

What types of attacks does Arcjet protect against?

Arcjet protects against prompt injection, sensitive data exfiltration (PII leaks), unauthorized tool calls, bot abuse, and sequence drift. It also provides Shield WAF for web applications and email validation.

Which AI agent frameworks does Arcjet integrate with?

Arcjet integrates with major AI agent frameworks including LangChain, LangGraph, CrewAI, Genkit, Mastra, Microsoft Agent Framework, OpenAI Agents, Strands Agents, TanStack AI, Vercel AI SDK, and Vercel Eve, as well as custom agents via SDKs.

Does Arcjet support web frameworks?

Yes, Arcjet supports popular web frameworks including Next.js, Nuxt, SvelteKit, Astro, Express, Fastify, Hono, NestJS, Remix, React Router, FastAPI, Flask, and Go's net/http.

How does Arcjet handle sensitive data?

Arcjet performs sensitive data loss prevention (DLP) by checking inputs to stop PII from leaking into the LLM context and checking outputs before they are sent out. Sensitive checks run in-process, so data never leaves your environment.

What is the difference between web requests and agent requests in pricing?

Web requests cover protecting websites and web apps with bot protection, Shield WAF, and email validation, priced at $5 per 1M requests. Agent requests cover protecting coding agents and custom agents with PII detection, prompt injection protection, and tool guards, priced at $50 per 1M requests.

Can I try Arcjet before committing?

Yes, Arcjet offers a 15-day free trial on its Individual and Startup plans. There is also a live example application you can test to see how Arcjet protects an example app.

Does Arcjet provide audit logs?

Yes, Arcjet keeps a detailed audit trail including decisions, policy versions, actor, inputs, and run history. Log retention varies by plan, with 1 hour on Individual, 24 hours on Startup, and SIEM export on Enterprise.

Source: arcjet.com

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