AI · alternatives · 2026
24 alternatives to ModernGuard: LLM guardrail API
Fast and adaptive security guardrail for AI agents
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.
- 1
Configurable safety control for enterprise agent deployment.
Apr 2026 · elevenlabs.io · its alternatives →
- 2
CtrlAI▲104Transparent proxy that secures AI agents with guardrails
Mar 2026 · github.com · its alternatives →
- 3
Lakera Guard▲131Protect your LLM applications with a few lines of code.
2023 · lakera.ai · its alternatives →
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GuardRails▲66Continuous security feedback for your repositories.
2020 · guardrails.io · its alternatives →
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Align API▲87Plug-and-play guardrails for your AI application
2023 · alignapi.com · its alternatives →
- 9FL
Hi HN! We just launched Codacy Guardrails, an IDE extension with a CLI for code analysis and MCP server that enforces security & quality rules on AI-generated code in real-time. It hooks into AI coding assistants (like VS Code Agent Mode, Cursor, Windsurf), silently scanning and fixing AI-suggested code that has vulnerabilities or violates your coding standards, while the code it’s being generated. We built this because coding agents can be a double-edged sword. They do boost productivity, but can easily introduce insecure or non-compliant code. One recent research team at NYU found that 40%…
2025 · its alternatives →
- 10
Full visibility into your AI spend, before it goes rogue
Aug 2026 · neatproxy.com · its alternatives →
- 11
An information-flow policy engine for LLM agents.
24d ago · openappa.com · its alternatives →
- 12
Universal AI agent guardrail. The bodyguard for AI agents.
Feb 2026 · github.com · its alternatives →
- 13
The World's First Stateful AI Governance Platform
Aug 2026 · theseusguard.com · 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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Metaguard▲13Anti Phishing tool for all your Crypto Transactions
2021 · metaguard.app · its alternatives →
- 18
AI security and governance platform, adopting generative AI
Dec 2025 · beyondguard.ai · its alternatives →
- 19
Open-source pre-execution security for AI coding agents - FvdHMBAI/guardrail
Sep 2026 · github.com · its alternatives →
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Prompt-injection firewall for prod LLM apps
Jul 2026 · insightits.com · its alternatives →
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AI guardrails and governance for production GenAI
Feb 2026 · guardrailx.org · its alternatives →
- 24
Hi HN, I've been developing Portkey Gateway, an open-source AI gateway that's now processing billions of tokens daily across 200+ LLMs. Today, we're launching a significant update: integrated Guardrails at the gateway level. Key technical features: 1. Guardrails as middleware: We've implemented a hooks architecture that allows guardrails to act as middleware in the request/response flow. This enables real-time LLM output evaluation and transformation. 2. Flexible orchestration: The gateway can now route requests based on guardrail verdicts. This allows for complex logic like fallbacks…
2024 · github.com · 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 →