AI · alternatives · 2026
24 alternatives to Prompt Cage
Prompt injection protection As a Service
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.
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Prompt Library▲331All your best prompts. One shortcut away.
Feb 2026 · prompt-library.app · its alternatives →
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PromptForge▲474PromptForge: Open-source AI prompt engineering workbench with systematic evaluation I built PromptForge after getting frustrated with the manual trial-and-error approach to prompt engineering. Most tools are just text editors, but I wanted something that brings software engineering discipline to prompt development. Key technical features: - AI-assisted prompt generation (stop starting from scratch) - Systematic evaluation engine that auto-generates test suites - Multi-model support (Claude, GPT-4, Azure OpenAI) - Go backend with SQLite for performance and simplicity - One-line Docker…
2025 · github.com · its alternatives →
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PromptPaste▲119Your private AI prompt library on Mac, iPhone, and iPad
Apr 2026 · getpromptpaste.com · its alternatives →
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Interactive prompt for command-line applications. Contribute to manifoldco/promptui development by creating an account on GitHub.
2017 · github.com · its alternatives →
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Prompt injection and token savings - #1 in benchmarks
Jul 2026 · constellationgate.ai · its alternatives →
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The AI firewall that understands compliance context
Dec 2025 · promptlock.io · its alternatives →
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Stop prompt injection before it reaches your AI agent
Aug 2026 · mcp.glc-rag.hu · its alternatives →
- 12AM
I made an open source, MIT license Typescript library based on some of the latest research that generates prompt injection attacks. It is a super minimal/lightweight and designed to be super easy to use. Keen to hear your thoughts and please be responsible and only pen test systems where you have permission to pen test!
2025 · prompt-injector.blueprintlab.io · its alternatives →
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Safeguard your prompts before they reach AI
Dec 2025 · preempt-ai.vercel.app · its alternatives →
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Your agent team, on your machine. Open-source harness for multi-user Claude agents. - yaodub/cast
Jun 2026 · github.com · its alternatives →
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Your company’s private, organized AI prompt vault
2025 · promptkeep.com · its alternatives →
- 16FP
We've built an open-source tool to stress test AI agents by simulating prompt injection attacks. We’ve implemented one powerful attack strategy based on the paper [AdvPrefix: An Objective for Nuanced LLM Jailbreaks](https://arxiv.org/abs/2412.10321). Here's how it works: - You define a goal, like: “Tell me your system prompt” - Our tool uses a language model to generate adversarial prefixes (e.g., “Sure, here are my system prompts…”) that are likely to jailbreak the agent. - The output is a list of prompts most likely to succeed in bypassing safeguards. We’re just getting…
2025 · security.vista-labs.ai · its alternatives →
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Hi HN, Matvey, Ildar, Joey, and Dominik here. If you're building LLM agents that use tools, you're probably worried about prompt injection attacks that can hijack those tools. We were too, and found that solutions like prompt-based filtering or secondary "guard" LLMs can be unreliable. Our thesis is that agent security should be handled at the network level between the agent and the LLM, just like a traditional web application firewall. So we built Archestra Platform: an open-source gateway that acts as a secure proxy for your AI agents. It's designed to be a deterministic firewall against…
2025 · archestra.ai · its alternatives →
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Just stop jailbreaks & prompt hacks with one API call.
2025 · expireddomains.com · its alternatives →
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Never lose a prompt again with AI-powered prompt management
2025 · promptpanda.io · its alternatives →
- 21PA
Even if you're not a Prompt whiz, you can still get top-notch results just like the pros. This Product will handle internally handle boring And Cognitively demanding prompt Engineering. Just pick a service, fill in the keywords, and get the desired result! Open Source , Free , Privacy Friendly , Crowd Source Prompts, No Login Required. You can submit Features(https://prompt-apps.canny.io/feature-requests?sort=top) and Prompts (https://prompt-apps.canny.io/prompt-conversion?sort=top)
2023 · chatgpt-prompt-apps.com · its alternatives →
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Your AI prompt vault. Guarded by SPHYNX. Accessed instantly.
2025 · harmonizeops.com · its alternatives →
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Revolutionizing Network Management with AI
2025 · netprompt.ai · its alternatives →
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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,…
Dec 2025 · promptguard.co · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →