PromptGuard

What it does

73% of production AI apps have prompt injection vulnerabilities (Source: OWASP LLM Top 10 Research, 2024). PromptGuard catches them in 22 seconds. Get a security score, risk breakdown, and actionable fixes for every prompt. Free tier included. One of the few remaining independent self-serve prompt security tools on the market. 📦 974+ npm downloads/week ⚡ <5ms, zero dependencies, offline 🔓 Apache 2.0 | npm i @ny-squared/guard npm install @ny-squared/guard

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  PromptGuardDec 2025 · promptguard.co · ▲3

  Every other gateway is detect-and-block. You don't get a security grade. You don't get red team in CI. We built the one that does. PromptGuard is a proxy: change your base URL (one line with our SDK, or a few lines without), and every request gets checked for prompt injection, PII leaks, jailbreaks, and abuse. 20+ threat vectors, 39+ PII types. We also ship a red team suite and an autonomous agent that mutates attacks to find bypasses - you get a grade (A-F) and a GitHub Action that runs these tests on every PR. So you see where you're weak before you ship. Works with OpenAI, Anthropic,…

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  PromptBrakeMar 2026 · promptbrake.com · ▲6

  Find AI vulnerabilities before hackers do

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  PROMPTPurifyMay 2026 · github.com · ▲4

  Tiny prompt-injection firewall for LLM chat apps. 14 MB.

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  promptShieldJul 2026 · promptshield.ca · ▲11

  Anonymize client docs before you paste them into AI

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  Preempt AIDec 2025 · preempt-ai.vercel.app · ▲3

  Safeguard your prompts before they reach AI

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  GaleOps Prompt-Injection ScannerAug 2026 · galeops.xyz · ▲2

  Find prompt injection holes in your AI agent. Free, 3 min

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  AI · Apr 2026 · text.blogosphere.app