Best Fiddler Guardrails Alternatives in 2026
The top Fiddler Guardrails alternatives are Enkrypt AI Guardrails, VotalAI and OpenAI Guardrails: 15 AI guardrail software our editors would look at instead of Fiddler Guardrails, in our ranking order.
Fiddler Guardrails: Affordable runtime evaluation with policy enforcement, detection, and gateway integrations. Where it falls short: enterprise pricing requires contacting the vendor.
Switching from Fiddler Guardrails? For most ai guardrail software buyers the best Fiddler Guardrails 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 Fiddler Guardrails Alternative
- Enterprise pricing requires contacting the vendor
- Gateway integrations center on four listed frameworks
- Advanced deployment options are concentrated in the Enterprise plan
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
All 15 Fiddler Guardrails 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 Fiddler Guardrails:
- Editor score 9.4 vs 8.2
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 Fiddler Guardrails:
- Editor score 9.2 vs 8.2
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 Fiddler Guardrails:
- Editor score 9.0 vs 8.2
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 Fiddler Guardrails:
- Editor score 8.8 vs 8.2
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 Fiddler Guardrails:
- Editor score 8.7 vs 8.2
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 Fiddler Guardrails:
- Editor score 8.6 vs 8.2
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 Fiddler Guardrails:
- Editor score 8.4 vs 8.2
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 Fiddler Guardrails:
- Editor score 8.3 vs 8.2
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 wanting free runtime safety enforcement
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
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
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
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
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
A strong fit for AI red-team testing, with broad model coverage and a free entry plan.
7.6/10★★★★☆Visit PromptGuard -
Best forDevelopers wanting open-source scanner services
A focused, self-hosted scanner toolkit for developers securing LLM inputs and outputs.
7.5/10★★★★☆Visit LLM Guard
Fiddler Guardrails Alternatives: Common Questions
What is the best alternative to Fiddler Guardrails?
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 Fiddler Guardrails?
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 Fiddler Guardrails?
Of the alternatives here that publish a price, OpenGuardrails starts lowest, at $10/mo.
Why do people look for Fiddler Guardrails alternatives?
Enterprise pricing requires contacting the vendor; Gateway integrations center on four listed frameworks; Advanced deployment options are concentrated in the Enterprise plan.
How do I switch from Fiddler Guardrails?
Export your data from Fiddler Guardrails (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 Fiddler Guardrails.
How to Switch from Fiddler Guardrails
- Export your data from Fiddler Guardrails (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 Fiddler Guardrails.
Fiddler Guardrails vs Each Alternative
| # | Tool | Free plan | Paid from | Deployment | Prompt injection defense | PII detection | Score |
|---|---|---|---|---|---|---|---|
| 9 | Fiddler Guardrails | Yes | $0.002/unit usage-based | Hybrid | Yes | Yes | 8.2 |
| 1 | Enkrypt AI Guardrails | Yes | $134/mo | Yes | Yes | 9.4 | |
| 2 | VotalAI | 9.2 | |||||
| 3 | OpenAI Guardrails | Free | Hybrid | 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 | 8.4 | ||
| 8 | Splunk Guardrails | Yes | $100/unit/mo | Hybrid | Yes | Yes | 8.3 |
| 9 | Openlayer Guardrails | Yes | Hybrid | Yes | Yes | 8.1 | |
| 10 | Pangea AI Guard | Yes | Hybrid | Yes | Yes | 8.0 | |
| 11 | Check Point AI Guardrails | 7.9 | |||||
| 12 | OpenGuardrails | No | $10/mo | Hybrid | Yes | Yes | 7.8 |
| 13 | OpenSecureAI Prompt Firewall | Yes | $49/mo | Hybrid | Yes | Yes | 7.7 |
| 14 | PromptGuard | Yes | $19/seat/mo | 7.6 | |||
| 15 | LLM Guard | Free | 7.5 |
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Last updated · How we research and update