Best LLM Security Tools in 2026
Updated
In short: PromptGuard is ranked #1 of 28 as of 4 October 2026, ahead of Amazon Bedrock Guardrails and Openlayer Guardrails. The best-ranked option with a free plan is Openlayer Guardrails. The lowest first paid tier on this page is Amazon Bedrock Guardrails at $0.07/mo.
Choosing safeguards for an LLM application means matching protections and deployment options to the risks you need to address. The ranking compares deployment model, model-abuse detection, output guardrails and prompt injection defense, as well as PII redaction and secrets detection. Free-plan availability and paid-from pricing add a way to weigh access and cost. PromptGuard, WitnessAI and GuardionAI are among the first entries, followed by Lasso AI Security Platform and LLM Guard. Compare the safeguards each tool lists with your application’s needs, and use deployment model to consider how each option may fit your operating setup.
28 LLM security tools ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
#1 PromptGuard Top pick · 7.3 Free plan · $19/mo #2 Amazon Bedrock Guardrails Runner-up · 6.9 $0.07/mo
#3 Openlayer Guardrails Also great · 6.8 Free plan · Free- Free plan apiextensionLinuxmacOSself-hostedWebWindows
- Free plan
- Yes
RecognisedDocumentedFree planPlatforms$19/mofirst paid tier About PromptGuardVisit site - Web
- Free plan
- No
- Prompt injection defense
- Yes
- PII redaction
- Yes
- Secrets detection
- Yes
- Output guardrails
- Yes
RecognisedDocumentedFree planPlatforms$0.07/mofirst paid tier About Amazon Bedrock GuardrailsVisit site - Free plan apiself-hostedWeb
- Free plan
- Yes
- Prompt injection defense
- Yes
- PII redaction
- Yes
- Output guardrails
- Yes
RecognisedDocumentedFree planPlatforms - Free plan apiself-hostedWeb
- Free plan
- Yes
- Prompt injection defense
- Yes
- PII redaction
- Yes
- Output guardrails
- Yes
RecognisedDocumentedFree planPlatforms - apiWebWindows
- Prompt injection defense
- Yes
- PII redaction
- Yes
- Secrets detection
- Yes
- Output guardrails
- Yes
RecognisedDocumentedFree planPlatforms - Free trial apiLinuxmacOSself-hostedWebWindows
- Free plan
- No
- Prompt injection defense
- Yes
- PII redaction
- Yes
- Secrets detection
- Yes
- Output guardrails
- Yes
RecognisedDocumentedFree planPlatforms - apiextensionWeb
- Prompt injection defense
- Yes
- PII redaction
- Yes
- Secrets detection
- Yes
- Output guardrails
- Yes
RecognisedDocumentedFree planPlatforms - apiself-hostedWeb
- Prompt injection defense
- Yes
- PII redaction
- Yes
- Secrets detection
- Yes
- Output guardrails
- Yes
RecognisedDocumentedFree planPlatforms - self-hostedWeb
- Prompt injection defense
- Yes
- PII redaction
- Yes
- Secrets detection
- Yes
- Output guardrails
- Yes
RecognisedDocumentedFree planPlatforms$416666.67/mofirst paid tier About HiddenLayer AI GuardrailsVisit site - apiself-hostedWeb
- Free plan
- No
- Paid from
- 2,999 /mo
- Prompt injection defense
- Yes
- PII redaction
- Yes
- Secrets detection
- Yes
- Output guardrails
- Yes
RecognisedDocumentedFree planPlatforms$2,999/mofirst paid tier About SecureAI GuardVisit site - self-hostedWeb
- Free plan
- No
- Prompt injection defense
- Yes
- PII redaction
- Yes
- Secrets detection
- Yes
- Output guardrails
- Yes
RecognisedDocumentedFree planPlatforms - WindowsmacOSLinux
- Prompt injection defense
- Yes
- PII redaction
- Yes
- Secrets detection
- Yes
- Output guardrails
- Yes
RecognisedDocumentedFree planPlatforms - Web
- Prompt injection defense
- Yes
- PII redaction
- Yes
- Output guardrails
- Yes
RecognisedDocumentedFree planPlatforms - WebRecognisedDocumentedFree planPlatforms
- WebWindowsmacOSLinux
- Free plan
- Yes
- Prompt injection defense
- Yes
RecognisedDocumentedFree planPlatforms - api
- Free plan
- No
- Prompt injection defense
- Yes
- PII redaction
- Yes
- Secrets detection
- Yes
- Output guardrails
- Yes
RecognisedDocumentedFree planPlatforms - Web
- Prompt injection defense
- Yes
- PII redaction
- Yes
- Secrets detection
- Yes
- Output guardrails
- Yes
RecognisedDocumentedFree planPlatforms -
- Prompt injection defense
- Yes
- PII redaction
- Yes
- Secrets detection
- Yes
- Output guardrails
- Yes
RecognisedDocumentedFree planPlatforms -
- Prompt injection defense
- Yes
- PII redaction
- Yes
- Secrets detection
- Yes
- Output guardrails
- Yes
RecognisedDocumentedFree planPlatforms - Web
- Prompt injection defense
- Yes
- PII redaction
- Yes
- Secrets detection
- Yes
- Output guardrails
- Yes
RecognisedDocumentedFree planPlatforms -
- Prompt injection defense
- Yes
- PII redaction
- Yes
- Output guardrails
- Yes
RecognisedDocumentedFree planPlatforms - Web
- Prompt injection defense
- Yes
- PII redaction
- Yes
- Secrets detection
- Yes
- Output guardrails
- Yes
RecognisedDocumentedFree planPlatforms - AndroidapiiOSself-hostedWeb
- Free plan
- Yes
RecognisedDocumentedFree planPlatforms - Web
- Free plan
- No
- Paid from
- 10 /mo
RecognisedDocumentedFree planPlatforms$10/mofirst paid tier About Cloudflare Advanced Certificate ManagerVisit site -
- Prompt injection defense
- Yes
- PII redaction
- Yes
- Secrets detection
- Yes
- Output guardrails
- Yes
RecognisedDocumentedFree planPlatforms
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 LLM security tool is ranked first on Everything Xiaomi?
PromptGuard is ranked #1 of 28 with a score of 7.3. Amazon Bedrock Guardrails is second and Openlayer Guardrails third.
How many of these have a free plan?
3 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: documentation depth, a free tier and the platforms it runs on. Paid placements never change a rank.