Best AI Security Testing Tools in 2026
Updated
In short: F5 BIG-IP APM is ranked #1 of 29 as of 4 October 2026, ahead of OpenSecureAI Scanner and PyRIT. The best-ranked option with a free plan is OpenSecureAI Scanner. The lowest first paid tier on this page is PromptGuard at $19/mo.
When you need to assess how an AI system responds to security risks, these tools offer several testing dimensions to compare. Look at prompt injection, jailbreak, data leakage, and unsafe output tests, and consider whether custom test cases are important for your evaluations. Deployment mode, free-plan availability, and paid-from pricing can also shape the fit. PromptGuard, AgentScan, and OpenSecureAI Scanner lead the ranking, with Basilisk, PyRIT, and Project Moonshot among the entries that follow. Use the listed criteria to focus on the risks you want to test and how you need to run those tests.
29 AI security testing tools ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
#1 F5 BIG-IP APM Top pick · 7.3 
#2 OpenSecureAI Scanner Runner-up · 7.3 Free plan · $49/mo
#3 PyRIT Also great · 7.2 Free plan · Free- Free trial AndroidapiiOSLinuxmacOSself-hostedWebWindows
- Prompt injection tests
- Yes
- Jailbreak tests
- Yes
- Data leakage tests
- Yes
- Unsafe output tests
- Yes
RecognisedDocumentedFree planFree trialPlatforms - Free plan apiLinuxmacOSWebWindows
- Free plan
- Yes
- Paid from
- 49 /mo
- Prompt injection tests
- Yes
- Jailbreak tests
- Yes
- Data leakage tests
- Yes
- Unsafe output tests
- Yes
RecognisedDocumentedFree planFree trialPlatforms$49/mofirst paid tier About OpenSecureAI ScannerVisit site - Free plan apiLinuxmacOSself-hostedWebWindows
- Free plan
- Yes
- Prompt injection tests
- Yes
- Jailbreak tests
- Yes
- Data leakage tests
- Yes
- Unsafe output tests
- Yes
RecognisedDocumentedFree planFree trialPlatforms - Free plan LinuxmacOSself-hostedWindows
- Prompt injection tests
- Yes
- Jailbreak tests
- Yes
- Data leakage tests
- Yes
- Unsafe output tests
- Yes
RecognisedDocumentedFree planFree trialPlatforms - Free plan LinuxmacOSWindows
- Free plan
- Yes
- Prompt injection tests
- Yes
- Jailbreak tests
- Yes
- Data leakage tests
- Yes
- Unsafe output tests
- Yes
RecognisedDocumentedFree planFree trialPlatforms - Free plan apiLinuxmacOSself-hostedWebWindows
- Free plan
- Yes
- Prompt injection tests
- Yes
- Jailbreak tests
- Yes
- Data leakage tests
- Yes
- Unsafe output tests
- Yes
RecognisedDocumentedFree planFree trialPlatforms - Free plan apiLinuxmacOSself-hostedWebWindows
- Free plan
- Yes
RecognisedDocumentedFree planFree trialPlatforms - Free plan apiextensionLinuxmacOSself-hostedWebWindows
- Free plan
- Yes
- Prompt injection tests
- Yes
- Jailbreak tests
- Yes
- Data leakage tests
- Yes
- Unsafe output tests
- Yes
RecognisedDocumentedFree planFree trialPlatforms$19/mofirst paid tier About PromptGuardVisit site - Free plan apiWeb
- Free plan
- Yes
- Paid from
- 29 /mo
- Prompt injection tests
- Yes
- Jailbreak tests
- Yes
- Data leakage tests
- Yes
- Unsafe output tests
- Yes
RecognisedDocumentedFree planFree trialPlatforms$29/mofirst paid tier About AgentScanVisit site - Free plan apiLinuxself-hostedWeb
- Free plan
- Yes
RecognisedDocumentedFree planFree trialPlatforms - Linux
- Free plan
- Yes
- Prompt injection tests
- Yes
- Jailbreak tests
- Yes
- Data leakage tests
- Yes
- Unsafe output tests
- Yes
RecognisedDocumentedFree planFree trialPlatforms - Web
- Prompt injection tests
- Yes
- Jailbreak tests
- Yes
- Data leakage tests
- Yes
- Unsafe output tests
- Yes
RecognisedDocumentedFree planFree trialPlatforms - WindowsmacOSLinux
- Prompt injection tests
- Yes
- Data leakage tests
- Yes
- Unsafe output tests
- Yes
RecognisedDocumentedFree planFree trialPlatforms - Free plan apiLinuxmacOSWebWindows
- Free plan
- Yes
- Prompt injection tests
- Yes
- Jailbreak tests
- Yes
- Data leakage tests
- Yes
RecognisedDocumentedFree planFree trialPlatforms - Web
- Free plan
- Yes
- Prompt injection tests
- Yes
- Jailbreak tests
- Yes
- Data leakage tests
- Yes
- Unsafe output tests
- Yes
RecognisedDocumentedFree planFree trialPlatforms - Web
- Prompt injection tests
- Yes
- Jailbreak tests
- Yes
- Data leakage tests
- Yes
- Unsafe output tests
- Yes
RecognisedDocumentedFree planFree trialPlatforms - Web
- Prompt injection tests
- Yes
- Jailbreak tests
- Yes
- Data leakage tests
- Yes
- Unsafe output tests
- Yes
RecognisedDocumentedFree planFree trialPlatforms -
- Free plan
- Yes
- Prompt injection tests
- Yes
- Jailbreak tests
- Yes
- Unsafe output tests
- Yes
RecognisedDocumentedFree planFree trialPlatforms -
- Prompt injection tests
- Yes
- Jailbreak tests
- Yes
- Data leakage tests
- Yes
- Unsafe output tests
- Yes
RecognisedDocumentedFree planFree trialPlatforms - Web
- Prompt injection tests
- Yes
- Jailbreak tests
- Yes
- Data leakage tests
- Yes
- Unsafe output tests
- Yes
RecognisedDocumentedFree planFree trialPlatforms - WindowsLinux
- Prompt injection tests
- Yes
- Jailbreak tests
- Yes
- Data leakage tests
- No
RecognisedDocumentedFree planFree trialPlatforms -
- Free plan
- Yes
- Prompt injection tests
- Yes
- Jailbreak tests
- Yes
- Data leakage tests
- Yes
RecognisedDocumentedFree planFree trialPlatforms -
- Prompt injection tests
- Yes
- Jailbreak tests
- Yes
- Data leakage tests
- Yes
- Unsafe output tests
- Yes
RecognisedDocumentedFree planFree trialPlatforms -
- Free plan
- Yes
- Prompt injection tests
- Yes
- Jailbreak tests
- Yes
RecognisedDocumentedFree planFree trialPlatforms -
- Free plan
- Yes
- Prompt injection tests
- Yes
- Jailbreak tests
- Yes
- Unsafe output tests
- Yes
RecognisedDocumentedFree planFree trialPlatforms
Is your platform on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which AI security testing tool is ranked first on The Geeks Club?
F5 BIG-IP APM is ranked #1 of 29 with a score of 7.3. OpenSecureAI Scanner is second and PyRIT third.
How many of these have a free plan?
10 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, PromptGuard has the lowest first paid tier we found: $19/mo.
How is this list ranked?
Ranked on how quickly a newcomer can get going: documentation depth, a free tier or trial, and the platforms it runs on. Paid placements never change a rank.