Meta PurpleLlama (Llama Guard 4, Prompt Guard 2, LlamaFirewall)
Meta · Open Source · Trust 100Meta's open safety models and firewall that catch jailbreaks, prompt injection and insecure generated code.
Make it safe · Alternatives
Alternatives to ModelScan
ModelScan by Protect AI (Palo Alto Networks) belongs to the area “Make it safe” on OROBO. Here are 8 alternatives from the same area, first 8 with the same goals. Every entry is checked automatically every day (origin, code patterns, licence, maintenance, reachability); OROBO does not check whether software fits your purpose.
8 alternatives at a glance
garak
NVIDIA · Open Source · Trust 100Command-line scanner that probes a language model with hundreds of attacks for jailbreaks, leaks and hallucinations.
Guardrails AI
Guardrails AI (Harvey) · Open Source · Trust 100Python framework with validators that check AI inputs and outputs and enforce structured responses. Part of Harvey since September 2026.
NeMo Guardrails
NVIDIA · Open Source · Trust 100Toolkit for programmable guardrails: keeps chatbots on topic, masks personal data and blocks jailbreaks.
Giskard
Giskard · Open Source · Trust 100French open-source tool that scans LLM apps for hallucinations, prompt injection and data disclosure.
PyRIT
Microsoft (AI Red Team) · Open Source · Trust 100Python framework that lets security teams attack generative AI systems automatically to find risks.
promptfoo
Promptfoo (OpenAI) · Open Source · Trust 97Automatically tests prompts, agents and RAG apps and runs red-teaming and vulnerability scans locally. Now part of OpenAI, still open source.
Snyk Agent Scan (formerly Invariant MCP-Scan)
Snyk (ex-Invariant Labs team) · Open Source · Trust 100Scans installed MCP servers and agent skills for tool poisoning, hidden instructions and malware; includes a web inspector.
Keep comparing
All software in “Make it safe” with filters by price, offline use and difficulty.