Best LLM Security Tools in 2026
Updated
In short: Prompt Inspector is ranked #1 of 28 as of 4 October 2026, ahead of PromptGuard and Amazon Bedrock Guardrails. The best-ranked option with a free plan is PromptGuard. The lowest first paid tier on this page is Amazon Bedrock Guardrails at $0.07/mo.
When evaluating safeguards for an LLM application, compare the protections each tool lists and how it can be deployed. Model-abuse detection, output guardrails, and prompt injection defense address different concerns; PII redaction and secrets detection provide further points to check. PromptGuard, Amazon Bedrock Guardrails, and GuardionAI are among the options to examine, along with Openlayer Guardrails. Deployment model helps frame operating fit, while free-plan availability and paid-from pricing offer cost context. Consider the risks you need to address and compare the listed capabilities with your application’s requirements.
28 LLM security tools ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
LLM Security Tools, ranked on how quickly a newcomer can get going. 6 of the 25 on this page can be tried for free.
- 1 Prompt InspectorFree plan
- Free to practise on: yes
- Free trial: not on record
- Well documented: yes
- Runs where you work: yes
- 2 PromptGuardPaid from $19/mo
- Free to practise on: yes
- Free trial: not on record
- Well documented: yes
- Runs where you work: yes
- 3 Amazon Bedrock GuardrailsPaid from $0.07/mo
- Free to practise on: yes
- Free trial: not on record
- Well documented: yes
- Runs where you work: not on record
- 4 GuardionAI
- Free to practise on: not on record
- Free trial: yes
- Well documented: yes
- Runs where you work: yes
- 5 Openlayer GuardrailsFree plan
- Free to practise on: yes
- Free trial: not on record
- Well documented: yes
- Runs where you work: not on record
- 6 GLACISFree plan
- Free to practise on: yes
- Free trial: not on record
- Well documented: yes
- Runs where you work: not on record
- 7 WitnessAI
- Free to practise on: not on record
- Free trial: not on record
- Well documented: yes
- Runs where you work: not on record
- 8 Lasso AI Security Platform
- Free to practise on: not on record
- Free trial: not on record
- Well documented: yes
- Runs where you work: not on record
- 9 Prisma AIRS AI Gateway
- Free to practise on: not on record
- Free trial: not on record
- Well documented: yes
- Runs where you work: not on record
- 10 HiddenLayer AI GuardrailsPaid from $416666.67/mo
- Free to practise on: not on record
- Free trial: not on record
- Well documented: yes
- Runs where you work: not on record
- 11 Sanctum Runtime
- Free to practise on: not on record
- Free trial: not on record
- Well documented: yes
- Runs where you work: yes
- 12 SecureAI GuardPaid from $2,999/mo
- Free to practise on: not on record
- Free trial: not on record
- Well documented: yes
- Runs where you work: not on record
- 13 ZeroTrusted AI Firewall
- Free to practise on: not on record
- Free trial: not on record
- Well documented: yes
- Runs where you work: not on record
- 14 Inferwall
- Free to practise on: not on record
- Free trial: not on record
- Well documented: not on record
- Runs where you work: yes
- 15 Check Point AI Guardrails
- Free to practise on: not on record
- Free trial: not on record
- Well documented: yes
- Runs where you work: not on record
- 16 Microsoft Custom Neural Voice
- Free to practise on: not on record
- Free trial: not on record
- Well documented: yes
- Runs where you work: not on record
- 17 Guardrails AI
- Free to practise on: not on record
- Free trial: not on record
- Well documented: not on record
- Runs where you work: not on record
- 18 Noma Security
- Free to practise on: not on record
- Free trial: not on record
- Well documented: not on record
- Runs where you work: not on record
- 19 Straiker Defend AI
- Free to practise on: not on record
- Free trial: not on record
- Well documented: not on record
- Runs where you work: not on record
- 20 VotalAI
- Free to practise on: not on record
- Free trial: not on record
- Well documented: not on record
- Runs where you work: not on record
- 21 LLM Guard
- Free to practise on: not on record
- Free trial: not on record
- Well documented: not on record
- Runs where you work: not on record
- 22 NVIDIA NeMo Guardrails
- Free to practise on: not on record
- Free trial: not on record
- Well documented: not on record
- Runs where you work: not on record
- 23 Rocotal
- Free to practise on: not on record
- Free trial: not on record
- Well documented: not on record
- Runs where you work: not on record
- 24 Vigil Guard
- Free to practise on: not on record
- Free trial: not on record
- Well documented: not on record
- Runs where you work: not on record
- 25 Amazon Nova Reel
- Free to practise on: not on record
- Free trial: not on record
- Well documented: yes
- Runs where you work: not on record
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 The Geeks Club?
Prompt Inspector is ranked #1 of 28 with a score of 7.3. PromptGuard is second and Amazon Bedrock Guardrails third.
How many of these have a free plan?
4 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 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.