Best LLM Security Tools in 2026
Updated
In short: PromptGuard is ranked #1 of 28 as of 4 October 2026, ahead of Lasso AI Security Platform and WitnessAI. The lowest first paid tier on this page is Amazon Bedrock Guardrails at $0.07/mo.
If you’re adding LLM safeguards, compare the protections each tool lists with the risks and deployment setup you need to address. The ranked entries are compared on deployment model, model-abuse detection, output guardrails and prompt injection defense, alongside PII redaction and secrets detection. Free-plan availability and the paid-from price add cost considerations. PromptGuard, WitnessAI and Lasso AI Security Platform appear among the first entries, followed by GuardionAI and LLM Guard. Use the ranking order and the listed capabilities to weigh which tools warrant a closer look for your application.
28 LLM security tools ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
| # | Platform | Score | Why | From | Free plan | Paid from | Prompt injection defense | |
|---|---|---|---|---|---|---|---|---|
| 1 | PromptGuard | 7.3 | RecognisedAPIDocumented | $19/mo | Yes | — | — | View |
| 2 | Lasso AI Security Platform | 7.0 | RecognisedAPIDocumented | — | — | — | Yes | View |
| 3 |  WitnessAI | 7.0 | RecognisedAPIDocumented | — | — | — | Yes | View |
| 4 | Prisma AIRS AI Gateway | 6.9 | RecognisedAPIDocumented | — | — | — | Yes | View |
| 5 |  SecureAI Guard | 6.8 | RecognisedAPIDocumented | $2,999/mo | No | 2,999 /mo | Yes | View |
| 6 | GuardionAI | 6.7 | RecognisedAPIDocumented | — | No | — | Yes | View |
| 7 | Amazon Nova ReelAmazon Web Services | 6.6 | RecognisedAPIDocumented | — | No | — | Yes | View |
| 8 |  GLACIS | 5.5 | RecognisedAPIDocumented | — | Yes | — | Yes | View |
| 9 |  HiddenLayer AI Guardrails | 5.5 | RecognisedAPIDocumented | $416666.67/mo | — | — | Yes | View |
| 10 |  Openlayer Guardrails | 5.5 | RecognisedAPIDocumented | — | Yes | — | Yes | View |
| 11 | Amazon Bedrock Guardrails | 5.4 | RecognisedAPIDocumented | $0.07/mo | No | — | Yes | View |
| 12 | Prompt Inspector | 5.3 | RecognisedAPIDocumented | — | Yes | — | Yes | View |
| 13 | Sanctum Runtime | 5.3 | RecognisedAPIDocumented | — | Yes | — | — | View |
| 14 |  ZeroTrusted AI Firewall | 5.3 | RecognisedAPIDocumented | — | No | — | Yes | View |
| 15 | Check Point AI Guardrails | 5.2 | RecognisedAPIDocumented | — | — | — | Yes | View |
| 16 |  CyberSecEval | 5.2 | RecognisedAPIDocumented | — | Yes | — | — | View |
| 17 | Microsoft Custom Neural Voice | 5.2 | RecognisedAPIDocumented | — | — | — | — | View |
| 18 | Noma Security | 5.2 | RecognisedAPIDocumented | — | — | — | Yes | View |
| 19 | Straiker Defend AI | 5.2 | RecognisedAPIDocumented | — | — | — | Yes | View |
| 20 | Guardrails AI | 5.1 | RecognisedAPIDocumented | — | — | — | Yes | View |
| 21 |  Inferwall | 5.1 | RecognisedAPIDocumented | — | — | — | Yes | View |
| 22 |  LLM Guard | 5.1 | RecognisedAPIDocumented | — | — | — | Yes | View |
| 23 | NVIDIA NeMo Guardrails | 5.1 | RecognisedAPIDocumented | — | — | — | Yes | View |
| 24 | Vigil Guard | 5.1 | RecognisedAPIDocumented | — | — | — | Yes | View |
| 25 |  VotalAI | 5.1 | RecognisedAPIDocumented | — | — | — | Yes | View |
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 LLM security tool is ranked first on Inferse?
PromptGuard is ranked #1 of 28 with a score of 7.3. Lasso AI Security Platform is second and WitnessAI third.
How many of these have a free plan?
1 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, Amazon Bedrock Guardrails has the lowest first paid tier we found: $0.07/mo.
How is this list ranked?
Ranked on what each maker publishes, open and connectable first: a public API, open-source code, the depth of its documentation and a free tier to try it on. Model lists are sorted by the figure in their title, exactly as each provider publishes it. Paid placements never change a rank.