Lakera Guard
Protect your LLM applications with a few lines of code.
Lakera Guard launched on October 19, 2023 with 131 votes, #409 of 4,393 launches that month and more than 90% of that year's launches. The site was still online in September 2026, 3 years on.
What it does
The fastest and easiest way to protect your LLM-powered applications. Safeguard against prompt injection attacks, hallucinations, data leakage, toxic language, and more with Lakera Guard API. Built by devs, for devs. Integrate it with a few lines of code.
The AI-native security platform to accelerate GenAI initiatives—trusted by Fortune 500s, backed by the world’s largest AI red team.
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Insight IT Solutions PrismGuard Jul 2026 · insightits.com · ▲5Prompt-injection firewall for prod LLM apps
ModernGuard: LLM guardrail API2025 · guardion.ai · ▲7Fast and adaptive security guardrail for AI agents

Open-Source Gateway to Stop Tool-Abusing Prompt Injections2025 · archestra.ai · ▲9Hi 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…

LLMs can be susceptible to a new kind of malware2023 · github.com · ▲17New ways of breaking app-integrated LLMs . Contribute to greshake/llm-security development by creating an account on GitHub.
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