Best Augustus Alternatives in 2026
The top Augustus alternatives are PromptGuard, Akto Agentic Red Teaming and Mindgard: 15 AI security testing tools our editors would look at instead of Augustus, in our ranking order.
Augustus: A portable Go scanner for probing LLMs across attacks, providers, and custom endpoints. Where it falls short: self-hosted deployment requires security teams to manage the environment.
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Best forTeams wanting broad, affordable red teaming
Broad AI security testing with flexible deployment and a low-cost paid entry tier.
- Custom test cases
- Unsafe output tests
- Data leakage tests
9.3/10★★★★★Visit PromptGuard -
Best forEnterprise agent and API security teams
Broad AI security testing for enterprise agent and API security teams.
- Custom test cases
- Unsafe output tests
- Data leakage tests
9.1/10★★★★★Visit Akto -
Best forEnterprise AI risk and remediation programs
A broad AI risk platform spanning discovery, testing, protection, and remediation.
- Custom test cases
- Unsafe output tests
- Data leakage tests
9.0/10★★★★☆Visit Mindgard -
Best forLarge enterprises using F5 infrastructure
A self-hosted AI red-team platform for testing attacks, agent behavior, and operational risk.
- Custom test cases
- Unsafe output tests
- Data leakage tests
8.8/10★★★★☆Visit F5 AI Red Team -
Best forDevelopers building evaluation into CI/CD
Open-source AI evaluation and red teaming for development teams shipping LLM applications.
8.7/10★★★★☆Visit Promptfoo -
Best forCompliance-focused security engineers
A self-hosted toolkit for testing LLM security risks and producing compliance-ready reports.
- Custom test cases
- Unsafe output tests
- Data leakage tests
8.6/10★★★★☆Visit RedForge -
Best forSmall teams wanting transparent pricing
A focused cloud scanner with transparent entry pricing for AI-agent security testing.
- Unsafe output tests
- Data leakage tests
- Jailbreak tests
8.5/10★★★★☆Visit AgentScan -
Best forAgent teams testing complex attack lifecycles
A broad CLI for testing agent attack lifecycles locally and in CI/CD.
- Custom test cases
- Unsafe output tests
- Jailbreak tests
8.4/10★★★★☆Visit Crucible -
Best forMature teams needing evaluation workflows
Open-source testing with evaluation workflows for teams operating LLM applications.
8.3/10★★★★☆Visit Giskard -
Best forTeams wanting free continuous validation
A free platform for continuous red-team and guardrail validation of AI systems.
- Unsafe output tests
- Data leakage tests
- Jailbreak tests
8.2/10★★★★☆Visit AIRTaaS -
Best forBudget-conscious teams wanting a hosted scanner
A flexible hosted and local scanner with broad LLM security coverage.
- Unsafe output tests
- Data leakage tests
- Jailbreak tests
8.1/10★★★★☆Visit OpenSecureAI -
Best forTeams needing continuous pre-production testing
A broad AI security testing platform for continuous evaluations and actionable risk findings.
- Unsafe output tests
- Data leakage tests
- Jailbreak tests
8.0/10★★★★☆Visit site -
Best forOpen-source teams needing broad local testing
Broad self-hosted AI security testing with evolutionary adversarial search and CI/CD support.
- Custom test cases
- Unsafe output tests
- Data leakage tests
7.9/10★★★★☆Visit Basilisk -
Best forPython teams using compliance mappings
A Python-first toolkit for testing AI applications against attacks, leaks and unsafe outputs.
- Custom test cases
- Unsafe output tests
- Data leakage tests
7.8/10★★★★☆Explore DeepTeam -
Best forOpen-source LLM weakness scanning
A free, extensible command-line toolkit for scanning LLM weaknesses across local and hosted models.
7.7/10★★★★☆Visit garak
Augustus Alternatives: Common Questions
What is the best alternative to Augustus?
PromptGuard: #1 in our AI Security Testing Tools ranking, with an editor score of 9.3 out of 10. Broad AI security testing with flexible deployment and a low-cost paid entry tier.
Is there a free alternative to Augustus?
Yes. PromptGuard, Promptfoo, RedForge, AgentScan and Crucible have a free plan or a free tier (11 of the 15 alternatives on this page).
What is the cheapest paid alternative to Augustus?
Of the alternatives here that publish a price, AgentScan starts lowest, at $29/mo.
Augustus vs Each Alternative
| # | Tool | Free plan | Paid from | Prompt injection tests | Jailbreak tests | Data leakage tests | Unsafe output tests | Custom test cases | Deployment mode | Score |
|---|---|---|---|---|---|---|---|---|---|---|
| 16 | Augustus | — | None | Yes | Yes | Yes | Yes | Yes | Self_hosted | 7.6 |
| 1 | PromptGuard | Yes | $19/seat/mo | Yes | Yes | Yes | Yes | Yes | Both | 9.3 |
| 2 | Akto Agentic Red Teaming | — | — | Yes | Yes | Yes | Yes | Yes | Both | 9.1 |
| 3 | Mindgard | — | — | Yes | Yes | Yes | Yes | Yes | Both | 9.0 |
| 4 | F5 AI Red Team | — | — | Yes | Yes | Yes | Yes | Yes | Both | 8.8 |
| 5 | Promptfoo | Yes | — | — | — | — | — | — | — | 8.7 |
| 6 | RedForge | — | None | Yes | Yes | Yes | Yes | Yes | Self_hosted | 8.6 |
| 7 | AgentScan | Yes | $29/mo | Yes | Yes | Yes | Yes | — | Cloud | 8.5 |
| 8 | Crucible | Yes | — | Yes | Yes | — | Yes | Yes | Self_hosted | 8.4 |
| 9 | Giskard | Yes | — | — | — | — | — | — | — | 8.3 |
| 10 | AIRTaaS | Yes | None | Yes | Yes | Yes | Yes | — | — | 8.2 |
| 11 | OpenSecureAI Scanner | Yes | $49/mo | Yes | Yes | Yes | Yes | — | Both | 8.1 |
| 12 | Prompt Security AI Red Teaming | — | — | Yes | Yes | Yes | Yes | — | Both | 8.0 |
| 13 | Basilisk | Yes | None | Yes | Yes | Yes | Yes | Yes | Self_hosted | 7.9 |
| 14 | DeepTeam | — | None | Yes | Yes | Yes | Yes | Yes | Self_hosted | 7.8 |
| 15 | garak | Yes | None | — | — | — | — | — | — | 7.7 |
Guides on AI Security Testing Tools
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Last updated · How we research and update