Best LLM Security Tools in 2026
Updated
28 LLM security tools ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
28ranked
1free plans on this page
$10/molowest paid tier
8 Oct 2026last checked
1 of the 3 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 |
|---|---|---|---|---|---|---|---|
| 26 | CyberSecEvalLinux · Self-hosted · API | One bar | — | 1 of 6 | Free | 4.9 | |
| 27 | Prompt Security AI Red TeamingWeb | No signal | — | — | 1 of 6 | — | 4.9 |
| 28 | Cloudflare Advanced Certificate ManagerWeb | No signal | — | — | 1 of 6 | $10/mo | 4.8 |
Compare all 3 in a table
| # | App | Score | Free plan | From | Free plan | Paid from | Prompt injection defense | PII redaction |
|---|---|---|---|---|---|---|---|---|
| 26 | CyberSecEval | 4.9 | Free plan | Free | Yes | — | — | — |
| 27 | Prompt Security AI Red Teaming | 4.9 | No | — | — | — | — | — |
| 28 | Cloudflare Advanced Certificate Manager | 4.8 | No | $10/mo | No | 10 /mo | — | — |
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