Best AI Red Teaming Tools in 2026
Updated
In short: AgentSeal is ranked #1 of 27 as of 3 October 2026, ahead of OpenSecureAI Scanner and Promptfoo. The best-ranked option with a free plan is OpenSecureAI Scanner. The lowest first paid tier on this page is RedFang at $19/mo.
When assessing AI systems for security, you can compare red teaming tools by the attack categories and target systems they cover. Automation level and support for custom tests help distinguish testing approaches; deployment, continuous monitoring, and report exports show other aspects of the workflow to weigh. The listed comparisons also include free-plan availability and paid starting prices. AgentSeal, ProofLayer, and Darkhunt AI Security lead the ranked entries, with Promptfoo and Giskard among those that follow. Consider which targets you need to assess, whether you want ongoing monitoring, and how you need to review or export findings. Use the ranking alongside these capabilities to narrow your options.
27 AI red teaming tools ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
11 of the 25 here have a free tier you can use, 0 have open-source code on record, and 0 have full bars: free, open, on most of your devices and documented.
| # | App | Signal | Free tier | Open code | Devices | From | Score |
|---|---|---|---|---|---|---|---|
| 1 | AgentSealWeb · Windows · Mac · Linux · API | Three bars | — | 4 of 6 | Free | 6.6 | |
| 2 | OpenSecureAI ScannerWeb · Windows · Mac · Linux · API | Three bars | — | 4 of 6 | $49/mo | 6.6 | |
| 3 | PromptfooWeb · Windows · Mac · Linux · Self-hosted · API | Three bars | — | 4 of 6 | Free | 6.6 | |
| 4 | RedAmonWeb · Windows · Mac · Linux · Self-hosted · API | Three bars | — | 4 of 6 | Free | 6.6 | |
| 5 | Confident AIWeb · Self-hosted · API | Two bars | — | 1 of 6 | $200/mo | 6.4 | |
| 6 | Darkhunt AI SecurityWeb · Self-hosted · API | Two bars | — | 1 of 6 | Free | 6.4 | |
| 7 | GiskardWeb · Linux · Self-hosted · API | Two bars | — | 2 of 6 | Free | 6.4 | |
| 8 | NVADERWeb | Two bars | — | 1 of 6 | $49/mo | 6.4 | |
| 9 | ProofLayerWeb · Linux · Self-hosted · API | Two bars | — | 2 of 6 | Free | 6.4 | |
| 10 | RedFangWeb · API | Two bars | — | 1 of 6 | $19/mo | 6.4 | |
| 11 | RogueSelf-hosted | Two bars | — | 0 of 6 | Free | 6.4 | |
| 12 | Advent Prompt PwnWindows · Mac · Linux | One bar | — | — | 3 of 6 | — | 5.4 |
| 13 | F5 BIG-IP APMWeb · Windows · Mac · Linux · Android · iPhone · Self-hosted · API | Two bars | — | — | 6 of 6 | — | 5.4 |
| 14 | VirtueRedWeb | One bar | — | — | 1 of 6 | — | 5.4 |
| 15 | Prompt FuzzerWindows · Mac · Linux | One bar | — | — | 3 of 6 | — | 5.3 |
| 16 | Check Point AI GuardrailsWeb | One bar | — | — | 1 of 6 | — | 5.2 |
| 17 | garakWindows · Mac · Linux | One bar | — | — | 3 of 6 | — | 5.2 |
| 18 | HouYiNo platforms listed | No signal | — | — | 0 of 6 | — | 5.1 |
| 19 | KonaRedNo platforms listed | No signal | — | — | 0 of 6 | — | 5.1 |
| 20 | MindgardWeb | No signal | — | — | 1 of 6 | — | 5.1 |
| 21 | PromptRedTeamWeb | No signal | — | — | 1 of 6 | — | 5.1 |
| 22 | Aevrin AI Red TeamingNo platforms listed | No signal | — | — | 0 of 6 | — | 5.0 |
| 23 | PyRITWeb | No signal | — | — | 1 of 6 | — | 4.9 |
| 24 | DeepTeamNo platforms listed | No signal | — | — | 0 of 6 | — | 4.8 |
| 25 | RedHub Prompt Injection Red Team KitNo platforms listed | One bar | — | — | 0 of 6 | — | 4.8 |
Is your app 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 red teaming tool is ranked first on Freedom251?
AgentSeal is ranked #1 of 27 with a score of 6.6. OpenSecureAI Scanner is second and Promptfoo third.
How many of these have a free plan?
11 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, RedFang has the lowest first paid tier we found: $19/mo.
How is this list ranked?
Ranked free-and-open first: a usable free tier and open-source code, then the platforms it runs on and its documentation. Paid placements never change a rank.