PromptGuard Scan alternatives

Tools that do what PromptGuard Scan does, found by what they say they do rather than by shelf. Among the equally alike, the most used come first. Each line says how it differs from PromptGuard Scan.

Read 2026-10-27 · PromptGuard Scan itself: From $25/mo

With a free plan or free to use: Wardstone, AI Security Guard, LockLLM, Lakera, PromptGuard, Snyk, AgentShield, Sonar.

10 alternativesUnlike PromptGuard Scan

#1
Wardstone Security
Detects prompt injection attacks, jailbreaks, harmful content, and PII leakage in LLM inputs and outputs.
Free planCosts more
298
Active
From $199/mo
#2
AI Security Guard Security
Detects malicious packages, scans prompts for injection attacks, and monitors agent runtime security.
Free planAlso: Agents
675
Maintained
Free
2025
#3
LockLLM Security
Scans prompts for jailbreaks, injection attacks, and sensitive data before sending to AI models.
Free planAlso: Compliance
18
Maintained
From $0.00 per use
#4
ZeroLeaks Security
Automatically red teams AI agents and prompts to find prompt injection, tool hijacking, and data leakage vulnerabilities.
Costs moreAlso: Agents
34
Active
From $79/mo
#5
Lakera Security
Detects and prevents prompt injection attacks, data leakage, and jailbreaks in AI applications with real-time threat detection.
Free planMore widely used
2.9k
Active
Free plan
1993
#6
PromptGuard Security
Inspects requests to LLM applications and blocks prompt injection, jailbreak attempts, and personally identifiable information leaks.
Free planCosts more
12
Active
From $99/mo
#7
Snyk Security
Scans source code, open source dependencies, container images and infrastructure-as-code for vulnerabilities, and suggests fixes in the IDE, CLI and pull requests.
Free planAlso: Code generation, Agents
63.1k
Active
From $25/mo
2015
#8
AgentShield Security
Detects prompt injection, jailbreak, and data exfiltration attacks on LLM requests in real time.
Free planAlso: Monitoring
29 linking domains
Active
From $29/mo
#9
Kalpit Labs Security
Detects and blocks prompt injection, jailbreaks, and data leaks in LLM applications in real time.
Same job
Emerging
Maintained
#10
Sonar Developer tools
Analyzes source code statically in IDEs, CI pipelines and pull requests, reporting bugs, code smells, vulnerabilities and coverage against quality gates.
Free planCosts more
72.4k
Active
From $34/mo
2007

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How this list is made: the words PromptGuard Scan is described with (what it does, for whom, what it is used for) are matched against every tool in the Atlas. A tool on the same shelf, or doing the same kind of work, counts for a little more. Nothing here is paid for.