Free tier only
Free Alternatives to Arcjet (2026)
Arcjet starts at $5. Here are 6 Security & Privacy tools you can start using for free, ranked by how closely they match Arcjet, with what each charges once you outgrow the free plan.
Closest free matches
Ranked by shared use cases, audience and stack with Arcjet. Every tool here lists a free plan.
shim-cli is a free, Apache-2.0 command-line tool that hooks into Claude Code, Codex, Copilot CLI and VS Code to find secrets and personal data in what an agent sends, mask it where the client allows, and report session tokens and cost.
BAND is interaction infrastructure for AI agents: agents built on different frameworks join shared rooms where they exchange context, delegate work and ask humans for approval. Band Desktop brings this to local coding agents such as Claude Code, Codex and OpenCode.
NitroStack is a platform for building, testing and hosting Model Context Protocol (MCP) servers. It combines an open-source TypeScript SDK, a desktop IDE called NitroStudio and a serverless host called NitroCloud.
Scalekit is an authentication stack for AI agents and B2B apps. Its AgentKit product puts 600+ connectors and 30,000+ tools behind one MCP gateway, with per-user OAuth, scoped tool sets, event triggers and audit logs, so agents can act in users' apps without your code ever holding a token.
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Other free Security & Privacy tools
Popular free tools in the same category. Less closely matched to Arcjet, but worth a look.
| Tool | Free plan | Paid from |
|---|---|---|
| SAM - Chrome Web Store A powerful open-source adblocker featuring fingerprint protection and YouTube ad skipping. | Free | — |
| LLM API Security Testing for Prompt Injection and Data Leaks | PromptBrake Security test LLM-powered API endpoints for prompt injection, jailbreaks, data leaks, tool abuse, and unsafe behavior. Get evidence-backed findings in minutes. | Free endpoint scan with no credit card required | — |
Free alternatives to Arcjet: FAQ
Quick answers to common questions
Is Arcjet free?
No. Arcjet lists no free tier; its lowest published price is $5. Each tool below offers a free plan.
What is the best free alternative to Arcjet?
shim-cli is the closest free match by shared use cases, audience and stack. BAND, NitroStack and Scalekit are the next closest.
How were these free alternatives to Arcjet chosen?
Tools are ranked by similarity to Arcjet (shared use cases, target audience, tech stack and pricing model) and filtered to those whose listing shows a free tier, freemium plan or open-source edition. Where fewer than 2 close matches exist, popular free Security & Privacy tools fill the list and are labelled as such.
Building a free Security & Privacy tool?
List it free. Tools with a free tier appear on pages like this one.