Best OpenSecureAI Prompt Firewall Alternatives in 2026
15 AI guardrail software our editors would look at instead of OpenSecureAI Prompt Firewall, in our ranking order.
OpenSecureAI Prompt Firewall: A focused prompt firewall for injection, secrets, PII, and policy enforcement. Where it falls short: the verified feature set is narrower than broader guardrail suites.
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Best forTeams needing broad production guardrails
Broad runtime controls for teams securing production AI systems.
- Jailbreak detection
- Prompt injection defense
- PII detection
9.0/10★★★★☆Visit Enkrypt AI -
VotalAI not yet scored
Best forOrganizations wanting broad hybrid protection
Broad hybrid guardrails for prompts, agents, data, tools, and audit workflows.
—not yet scoredVisit VotalAI -
OpenAI Guardrails not yet scored
Best forOpenAI-oriented teams needing customizable checks
A flexible, OpenAI-focused guardrail framework for validating LLM workflows.
- Jailbreak detection
- Prompt injection defense
- PII detection
—not yet scoredVisit site -
Guardrails AI not yet scored
Best forTeams wanting open-source, flexible guardrails
A flexible open-source framework for checking LLM inputs, outputs, and application risks.
—not yet scoredVisit Guardrails AI -
NVIDIA NeMo Guardrails not yet scored
Best forDevelopers building self-hosted AI controls
A broad self-hosted toolkit for developers enforcing AI policies across application flows.
—not yet scoredVisit NVIDIA -
Best forAWS-centered teams needing extensive controls
A broad AWS guardrail layer for teams that need detailed AI content controls.
4.0/10★★☆☆☆Visit AWS -
HiddenLayer AI Runtime Security not yet scored
Best forSecurity teams monitoring AI runtime activity
A security-focused runtime layer for monitoring and controlling production AI activity.
- Jailbreak detection
- Prompt injection defense
- PII detection
—not yet scoredVisit HiddenLayer -
Best forFramework-agnostic enterprise agent governance
A framework-agnostic control plane for evaluating and blocking risky agent actions.
- Prompt injection defense
- PII detection
- Custom policies
8.0/10★★★★☆Visit Splunk -
Best forTeams needing affordable runtime evaluation
Affordable runtime evaluation with policy enforcement, detection, and gateway integrations.
- Jailbreak detection
- Prompt injection defense
- PII detection
9.0/10★★★★☆Visit Fiddler -
Best forTeams wanting free runtime safety enforcement
Runtime inspection and enforcement for teams protecting production AI applications.
- Jailbreak detection
- Prompt injection defense
- PII detection
8.0/10★★★★☆Visit Openlayer -
Pangea AI Guard not yet scored
Best forTeams wanting a low-cost API guardrail layer
A low-cost API guardrail layer covering content risks, agent tools, data protection, and audits.
- Jailbreak detection
- Prompt injection defense
- PII detection
—not yet scoredExplore Pangea AI -
Check Point AI Guardrails not yet scored
Best forEnterprises protecting agents and tool calls
A broad runtime guardrail layer for enterprises securing agents and tool calls.
—not yet scoredVisit Check Point -
Best forSmall teams wanting inexpensive policy enforcement
Affordable runtime guardrails for teams monitoring agent actions, data, and tool calls.
- Prompt injection defense
- PII detection
- Custom policies
7.0/10★★★★☆Visit OpenGuardrails -
Best forTeams focused on AI red-team testing
A strong fit for AI red-team testing, with broad model coverage and a free entry plan.
5.0/10★★☆☆☆Visit PromptGuard -
LLM Guard not yet scored
Best forDevelopers wanting open-source scanner services
A focused, self-hosted scanner toolkit for developers securing LLM inputs and outputs.
—not yet scoredVisit LLM Guard
OpenSecureAI Prompt Firewall Alternatives: Common Questions
What is the best alternative to OpenSecureAI Prompt Firewall?
Enkrypt AI Guardrails: #1 in our AI Guardrail Software ranking, with an editor score of 9.0 out of 10. Broad runtime controls for teams securing production AI systems.
Is there a free alternative to OpenSecureAI Prompt Firewall?
Yes. Enkrypt AI Guardrails, OpenAI Guardrails, Guardrails AI, NVIDIA NeMo Guardrails and Splunk Guardrails have a free plan or a free tier (10 of the 15 alternatives on this page).
What is the cheapest paid alternative to OpenSecureAI Prompt Firewall?
Of the alternatives here that publish a price, OpenGuardrails starts lowest, at $10/mo.
OpenSecureAI Prompt Firewall vs Each Alternative
| # | Tool | Free plan | Paid from | Deployment | Prompt injection defense | PII detection | Jailbreak detection | Score |
|---|---|---|---|---|---|---|---|---|
| 14 | OpenSecureAI Prompt Firewall | Yes | $49/mo | Hybrid | Yes | Yes | Yes | 8.8 |
| 1 | Enkrypt AI Guardrails | Yes | $134/mo | — | Yes | Yes | Yes | 9.0 |
| not scored | VotalAI | — | — | — | — | — | — | — |
| not scored | OpenAI Guardrails | — | None | Hybrid | Yes | Yes | Yes | — |
| not scored | Guardrails AI | — | None | — | — | — | — | — |
| not scored | NVIDIA NeMo Guardrails | — | None | — | — | — | — | — |
| 6 | Amazon Bedrock Guardrails | No | — | — | — | — | — | 4.0 |
| not scored | HiddenLayer AI Runtime Security | — | — | Hybrid | Yes | Yes | Yes | — |
| 8 | Splunk Guardrails | Yes | $100/mo | Hybrid | Yes | Yes | — | 8.0 |
| 9 | Fiddler Guardrails | Yes | — | Hybrid | Yes | Yes | Yes | 9.0 |
| 10 | Openlayer Guardrails | Yes | — | Hybrid | Yes | Yes | Yes | 8.0 |
| not scored | Pangea AI Guard | Yes | — | Hybrid | Yes | Yes | Yes | — |
| not scored | Check Point AI Guardrails | — | — | — | — | — | — | — |
| 13 | OpenGuardrails | No | $10/mo | Hybrid | Yes | Yes | — | 7.0 |
| 15 | PromptGuard | Yes | — | — | — | — | — | 5.0 |
| not scored | LLM Guard | — | None | — | — | — | — | — |
Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026