Best PII Firewall Alternatives in 2026
The top PII Firewall alternatives are Enkrypt AI Guardrails, VotalAI and OpenAI Guardrails: 15 AI guardrail software our editors would look at instead of PII Firewall, in our ranking order.
PII Firewall: A focused, configurable PII privacy layer for self-hosted LLM applications. Where it falls short: does not verify prompt-injection attacks.
Switching from PII Firewall? For most ai guardrail software buyers the best PII Firewall alternative is Enkrypt AI Guardrails, built for teams needing broad production guardrails. On a budget, OpenGuardrails starts at $10/mo.
Why People Look for a PII Firewall Alternative
- Does not verify prompt-injection attacks
- Does not provide jailbreak detection
- Self-hosted deployment requires Linux or API integration
- No prompt injection defense — 9 of the alternatives below have it
- No jailbreak detection — 7 of the alternatives below have it
Quick Picks by What You Need
- Best overallEnkrypt AI Guardrails9.4
Teams needing broad production guardrails
Visit Enkrypt AI Guardrails - Lowest priceOpenGuardrails7.8
Paid plans from $10/mo
Visit OpenGuardrails - Best free optionEnkrypt AI Guardrails9.4
Has a free plan
Visit Enkrypt AI Guardrails - Best for prompt injection defenseEnkrypt AI Guardrails9.4
Prompt injection defense (PII Firewall: no)
Visit Enkrypt AI Guardrails
All 15 PII Firewall Alternatives, Ranked
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.
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Best forTeams needing broad production guardrails
- Better than PII Firewall:
- Prompt injection defense
- Jailbreak detection
- Editor score 9.4 vs 6.5
Broad runtime controls for teams securing production AI systems.
- Jailbreak detection
- Prompt injection defense
- PII detection
9.4/10★★★★★Visit Enkrypt AI -
Best forOrganizations wanting broad hybrid protection
- Better than PII Firewall:
- Editor score 9.2 vs 6.5
Broad hybrid guardrails for prompts, agents, data, tools, and audit workflows.
9.2/10★★★★★Visit VotalAI -
Best forOpenAI-oriented teams needing customizable checks
- Better than PII Firewall:
- Prompt injection defense
- Jailbreak detection
- Editor score 9.0 vs 6.5
A flexible, OpenAI-focused guardrail framework for validating LLM workflows.
- Jailbreak detection
- Prompt injection defense
- PII detection
9.0/10★★★★☆Visit site -
Best forTeams wanting open-source, flexible guardrails
- Better than PII Firewall:
- Editor score 8.8 vs 6.5
A flexible open-source framework for checking LLM inputs, outputs, and application risks.
8.8/10★★★★☆Visit Guardrails AI -
Best forDevelopers building self-hosted AI controls
- Better than PII Firewall:
- Editor score 8.7 vs 6.5
A broad self-hosted toolkit for developers enforcing AI policies across application flows.
8.7/10★★★★☆Visit NVIDIA -
Best forAWS-centered teams needing extensive controls
- Better than PII Firewall:
- Editor score 8.6 vs 6.5
A broad AWS guardrail layer for teams that need detailed AI content controls.
8.6/10★★★★☆Visit AWS -
Best forSecurity teams monitoring AI runtime activity
- Better than PII Firewall:
- Prompt injection defense
- Jailbreak detection
- Editor score 8.4 vs 6.5
A security-focused runtime layer for monitoring and controlling production AI activity.
- Jailbreak detection
- Prompt injection defense
- PII detection
8.4/10★★★★☆Visit HiddenLayer -
Best forFramework-agnostic enterprise agent governance
- Better than PII Firewall:
- Prompt injection defense
- Editor score 8.3 vs 6.5
A framework-agnostic control plane for evaluating and blocking risky agent actions.
- Prompt injection defense
- PII detection
- Custom policies
8.3/10★★★★☆Visit Splunk -
Best forTeams needing affordable runtime evaluation
- Better than PII Firewall:
- Prompt injection defense
- Jailbreak detection
- Editor score 8.2 vs 6.5
Affordable runtime evaluation with policy enforcement, detection, and gateway integrations.
- Jailbreak detection
- Prompt injection defense
- PII detection
8.2/10★★★★☆Visit Fiddler -
Best forTeams wanting free runtime safety enforcement
- Better than PII Firewall:
- Prompt injection defense
- Jailbreak detection
- Editor score 8.1 vs 6.5
Runtime inspection and enforcement for teams protecting production AI applications.
- Jailbreak detection
- Prompt injection defense
- PII detection
8.1/10★★★★☆Visit Openlayer -
Best forTeams wanting a low-cost API guardrail layer
- Better than PII Firewall:
- Prompt injection defense
- Jailbreak detection
- Editor score 8.0 vs 6.5
A low-cost API guardrail layer covering content risks, agent tools, data protection, and audits.
- Jailbreak detection
- Prompt injection defense
- PII detection
8.0/10★★★★☆Explore Pangea AI -
Best forEnterprises protecting agents and tool calls
- Better than PII Firewall:
- Editor score 7.9 vs 6.5
A broad runtime guardrail layer for enterprises securing agents and tool calls.
7.9/10★★★★☆Visit Check Point -
Best forSmall teams wanting inexpensive policy enforcement
- Better than PII Firewall:
- Prompt injection defense
- Editor score 7.8 vs 6.5
Affordable runtime guardrails for teams monitoring agent actions, data, and tool calls.
- Prompt injection defense
- PII detection
- Custom policies
7.8/10★★★★☆Visit OpenGuardrails -
Best forDevelopers needing a simple prompt firewall
- Better than PII Firewall:
- Prompt injection defense
- Jailbreak detection
- Editor score 7.7 vs 6.5
A focused prompt firewall for injection, secrets, PII, and policy enforcement.
- Jailbreak detection
- Prompt injection defense
- PII detection
7.7/10★★★★☆Visit OpenSecureAI -
Best forTeams focused on AI red-team testing
- Better than PII Firewall:
- Editor score 7.6 vs 6.5
A strong fit for AI red-team testing, with broad model coverage and a free entry plan.
7.6/10★★★★☆Visit PromptGuard
PII Firewall Alternatives: Common Questions
What is the best alternative to PII Firewall?
Enkrypt AI Guardrails: #1 in our AI Guardrail Software ranking, with an editor score of 9.4 out of 10. Broad runtime controls for teams securing production AI systems.
Is there a free alternative to PII 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 PII Firewall?
Of the alternatives here that publish a price, OpenGuardrails starts lowest, at $10/mo.
Why do people look for PII Firewall alternatives?
Does not verify prompt-injection attacks; Does not provide jailbreak detection; Self-hosted deployment requires Linux or API integration.
How do I switch from PII Firewall?
Export your data from PII Firewall (most tools have an export in their settings). Sign up for the alternative; start on its free plan or trial if it has one. Import your export and set up the integrations your team relies on. Run both side by side for a short while, then cancel PII Firewall.
How to Switch from PII Firewall
- Export your data from PII Firewall (most tools have an export in their settings).
- Sign up for the alternative; start on its free plan or trial if it has one.
- Import your export and set up the integrations your team relies on.
- Run both side by side for a short while, then cancel PII Firewall.
PII Firewall vs Each Alternative
| # | Tool | Free plan | Paid from | Deployment | Prompt injection defense | PII detection | Jailbreak detection | Score |
|---|---|---|---|---|---|---|---|---|
| 20 | PII Firewall | Free | Self_hosted | No | Yes | No | 6.5 | |
| 1 | Enkrypt AI Guardrails | Yes | $134/mo | Yes | Yes | Yes | 9.4 | |
| 2 | VotalAI | 9.2 | ||||||
| 3 | OpenAI Guardrails | Free | Hybrid | Yes | Yes | Yes | 9.0 | |
| 4 | Guardrails AI | Free | 8.8 | |||||
| 5 | NVIDIA NeMo Guardrails | Free | 8.7 | |||||
| 6 | Amazon Bedrock Guardrails | No | $0.00075/unit usage-based | 8.6 | ||||
| 7 | HiddenLayer AI Runtime Security | Hybrid | Yes | Yes | Yes | 8.4 | ||
| 8 | Splunk Guardrails | Yes | $100/unit/mo | Hybrid | Yes | Yes | 8.3 | |
| 9 | Fiddler Guardrails | Yes | $0.002/unit usage-based | Hybrid | Yes | Yes | Yes | 8.2 |
| 10 | Openlayer Guardrails | Yes | Hybrid | Yes | Yes | Yes | 8.1 | |
| 11 | Pangea AI Guard | Yes | Hybrid | Yes | Yes | Yes | 8.0 | |
| 12 | Check Point AI Guardrails | 7.9 | ||||||
| 13 | OpenGuardrails | No | $10/mo | Hybrid | Yes | Yes | 7.8 | |
| 14 | OpenSecureAI Prompt Firewall | Yes | $49/mo | Hybrid | Yes | Yes | Yes | 7.7 |
| 15 | PromptGuard | Yes | $19/seat/mo | 7.6 |
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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