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Head-to-head · AI Security Testing Tools

PromptGuard vs AgentScan

  • Updated Oct 2026
  • Both researched from official sources
  • 7 checks side by side
Higher score PromptGuard #1 in AI Security Testing Tools 9.3/10 Free plan Free plan✓ 5 of 5 features Visit PromptGuard
AgentScan #7 in AI Security Testing Tools 8.5/10 Free plan Free plan✓ 4 of 5 features Visit AgentScan

PromptGuard leads on 1 check, AgentScan on 0, and 6 are even. Who comes out ahead on the 7 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scorePromptGuard · 9.3/10
  • Lowest starting pricePromptGuard · $19/seat/mo
  • Free planboth
  • Most featuresPromptGuard · 5 of 5

PromptGuard scores higher on our rubric for ai security testing tools: 9.3 against 8.5 out of 10; our editors rank them #1 and #7.

PromptGuard is cheaper to start at $19/mo against $29/mo. On deployment mode, PromptGuard gives you Both where AgentScan offers Cloud.

PromptGuard is the better fit for teams wanting broad, affordable red teaming. AgentScan is the better fit for small teams wanting transparent pricing.

  • PromptGuard fits best

    Teams wanting broad, affordable red teaming

  • AgentScan fits best

    Small teams wanting transparent pricing

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature PromptGuard 9.3/10 Visit ↗ AgentScan 8.5/10 Visit ↗
At a glance
Editor score 9.3 8.5
Ranking #1 in AI Security Testing Tools #7 in AI Security Testing Tools
Best for Teams wanting broad, affordable red teaming Small teams wanting transparent pricing
Pricing model Free plan + paid Free plan + paid
Starting price $19/seat/mo (best) $29/mo
Free plan ✓ ✓
Free trial — —
Deployment Cloud, Self-hosted, Desktop, Browser extension Cloud
Platforms Web, Windows, macOS, Chrome extension Web
Support Email, Community, Docs Email, Docs
Built for Small business, Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features PromptGuard 5/5 · AgentScan 4/5
Prompt injection tests ✓ ✓
Jailbreak tests ✓ ✓
Data leakage tests ✓ ✓
Unsafe output tests ✓ ✓
Custom test cases ✓ (best) Not checked yet
Specs
Deployment mode Both Cloud
Our review
Pros
  • 20+ attack vectors plus custom and fuzzed adversarial variants
  • CI/CD regression testing, security grades, and vulnerability reports
  • Web, desktop, browser extension, API, and self-hosted deployment
  • Tests injection, jailbreaks, leakage, RAG poisoning, MCP, and tool abuse
  • Free plan plus clear $29 monthly Starter pricing
  • Risk scores, severity ratings, remediation guidance, and report exports
Cons
  • Free plan limits usage to 20,000 scans per month and one API key
  • Advanced capabilities are concentrated in paid and higher-tier plans
  • Premium offers no listed feature highlights
  • Cloud deployment is limited to web and API coverage
  • Free plan highlights JSON results rather than PDF reports
  • Enterprise pricing is not published in the plan details
Our verdict

PromptGuard is an AI security platform for teams testing and protecting applications that use large language models. It sits between applications and LLM providers to detect prompt injection, jailbreak attempts, PII exposure, data…

Read the review →

AgentScan is a hosted security scanner for AI agents, LLM applications, RAG pipelines, and autonomous agents. It sends attack payloads through an API or web dashboard, then reports vulnerabilities with risk scores, severity ratings,…

Read the review →
  1. PromptGuardAI Security Testing Tools 9.3Free plan
  2. AgentScanAI Security Testing Tools 8.5Free plan

Strengths and trade-offs

  • PromptGuard — where it wins

    • 20+ attack vectors plus custom and fuzzed adversarial variants
    • CI/CD regression testing, security grades, and vulnerability reports
    • Web, desktop, browser extension, API, and self-hosted deployment

    Where it doesn't

    • Free plan limits usage to 20,000 scans per month and one API key
    • Advanced capabilities are concentrated in paid and higher-tier plans
    • Premium offers no listed feature highlights

  • AgentScan — where it wins

    • Tests injection, jailbreaks, leakage, RAG poisoning, MCP, and tool abuse
    • Free plan plus clear $29 monthly Starter pricing
    • Risk scores, severity ratings, remediation guidance, and report exports

    Where it doesn't

    • Cloud deployment is limited to web and API coverage
    • Free plan highlights JSON results rather than PDF reports
    • Enterprise pricing is not published in the plan details

More comparisons

All AI security testing tools comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update