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How to test your LLM app for prompt injection: promptfoo vs garak vs Giskard vs PyRIT vs sentinel-scan-cli

This story is from 2026-08-23. It is preserved in the archive; the latest stories are on the live feed.

If you're shipping anything with an LLM in the request path (a support bot, an agent that calls tools, a RAG pipeline reading untrusted documents) you eventually have to answer "did we actually test this for prompt injection, or did we just eyeball it." There are a handful of open source tools that…

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  1. 2026-08-23 20:45 · DEV Community — AI
    How to test your LLM app for prompt injection: promptfoo vs garak vs Giskard vs PyRIT vs sentinel-scan-cli

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