Arcjet

Key facts: Arcjet launched a family of custom-trained AI security models for coding agents on Product Hunt in November 2026. Arcjet is runtime security for AI agents and LLMs: one platform to observe, enforce and audit every agent, from coding agents like Claude Code, Codex and Cursor to custom agents built on LangChain, CrewAI, the OpenAI Agents SDK and more. Managed detectors cover prompt injection, PII and secrets, content moderation and filters, with agent guardrails controlling tools, MCP and API access, a policy engine, and audit logging with OpenTelemetry traces. SDKs are available for JavaScript, Python and Go, across frameworks from Next.js and Fastify to FastAPI and Hono.

Plans: Individual $25 a month (15-day trial, 1 team member, 1-hour log retention). Startup $299 a month (2 team members, 24-hour log retention, Slack support). Enterprise is custom (unlimited members, SIEM export, priority support). Plus usage fees, from $5 per 1M web requests.

Best for: Teams shipping AI agents who need to see, control and audit what their agents actually do. Who should skip it: anyone running one agent locally for personal use.

Pros

• One platform to observe, enforce and audit every agent
• Custom-trained security models for coding agents, launched November 2026
• Guardrails on tools, MCP and API access, not just the chat
• SDKs for JavaScript, Python and Go, across major frameworks

Watch out for

• Paid plans start at $25 a month, plus usage fees
• Log retention is 1 hour on Individual and 24 hours on Startup
• A security layer is only as good as the policies you write for it

Best for

Teams shipping AI agents who need to see, control and audit what their agents actually do. Who should skip it: anyone running one agent locally for personal use.

Pricing

Individual $25/month (15-day trial). Startup $299/month. Enterprise custom. Plus usage fees from $5 per 1M web requests.

FAQs

What is Arcjet? Runtime security for AI agents and LLMs: it observes, enforces and audits every agent, with detectors for prompt injection, PII, secrets and content, plus guardrails on tools, MCP and API access.

What launched in November 2026? A family of custom-trained AI security models for coding agents, announced on Product Hunt.

How much does Arcjet cost? Individual is $25 a month with a 15-day trial, Startup $299 a month, Enterprise custom, plus usage fees from $5 per 1M web requests.

Which agents and frameworks does it support? Coding agents like Claude Code, Codex and Cursor, plus LangChain, CrewAI, OpenAI Agents SDK and more, with SDKs for JavaScript, Python and Go.