# Fiddler Guardrails alternatives and competitors (2026)

The closest Fiddler Guardrails alternatives are [Aiceberg Risk Signals Library](https://cybersectools.com/tools/aiceberg-risk-signals-library), [Vulcan Protect](https://cybersectools.com/tools/vulcan-protect) and [Akamai Firewall for AI](https://cybersectools.com/tools/akamai-firewall-for-ai). Picking a Fiddler Guardrails alternative comes down to fit: LLM Guardrails coverage, your environment, your integrations and your budget. So each option below shows what it covers, how it deploys, its pricing model and the company behind it.

Closest 48 alternatives shown. Closest matches: Aiceberg Risk Signals Library, Vulcan Protect, Akamai Firewall for AI.

## The product

[Fiddler Guardrails](https://cybersectools.com/tools/fiddler-guardrails) by Fiddler AI

Guardrails for protecting LLM and agentic applications from harmful content

Category: [AI Security](https://cybersectools.com/categories/ai-security) · Pricing model: Commercial

## Fiddler Guardrails alternatives and competitors

Fiddler Guardrails is a commercial [LLM Guardrails](https://cybersectools.com/categories/llm-guardrails) solution made by Fiddler AI. The closest matches by shared tags and NIST CSF 2.0 coverage are [Aiceberg Risk Signals Library](https://cybersectools.com/tools/aiceberg-risk-signals-library), [Vulcan Protect](https://cybersectools.com/tools/vulcan-protect), [Akamai Firewall for AI](https://cybersectools.com/tools/akamai-firewall-for-ai), [Tinfoil GPT-OSS Safeguard 120B](https://cybersectools.com/tools/tinfoil-gpt-oss-safeguard-120b), and [Alice WonderFence](https://cybersectools.com/tools/alice-wonderfence). All 48 alternatives on this page are ranked the same way.

## The closest Fiddler Guardrails alternatives

These 8 solutions overlap most with Fiddler Guardrails. Each one says what the product does and, when the overlap is big enough, which capabilities it shares.

### 1. [Aiceberg Risk Signals Library](https://cybersectools.com/tools/aiceberg-risk-signals-library)

Library of AI threat detection signals for securing generative AI models

[LLM Guardrails](https://cybersectools.com/categories/llm-guardrails) · Commercial

Key features: 10 listed. See them on the [Aiceberg Risk Signals Library page](https://cybersectools.com/tools/aiceberg-risk-signals-library#features).

[Aiceberg Risk Signals Library alternatives](https://cybersectools.com/alternatives/aiceberg-risk-signals-library) · [Fiddler Guardrails vs Aiceberg Risk Signals Library](https://cybersectools.com/compare/aiceberg-risk-signals-library-vs-fiddler-guardrails)

### 2. [Vulcan Protect](https://cybersectools.com/tools/vulcan-protect)

Runtime guardrail platform that monitors and protects GenAI inputs/outputs in production

[LLM Guardrails](https://cybersectools.com/categories/llm-guardrails) · Commercial

Key features: 1 listed. See them on the [Vulcan Protect page](https://cybersectools.com/tools/vulcan-protect#features).

[Vulcan Protect alternatives](https://cybersectools.com/alternatives/vulcan-protect) · [Fiddler Guardrails vs Vulcan Protect](https://cybersectools.com/compare/fiddler-guardrails-vs-vulcan-protect)

### 3. [Akamai Firewall for AI](https://cybersectools.com/tools/akamai-firewall-for-ai)

Firewall protecting LLMs from prompt attacks, data leaks, and harmful outputs

[LLM Guardrails](https://cybersectools.com/categories/llm-guardrails) · Commercial

Key features: 8 listed. See them on the [Akamai Firewall for AI page](https://cybersectools.com/tools/akamai-firewall-for-ai#features).

[Akamai Firewall for AI alternatives](https://cybersectools.com/alternatives/akamai-firewall-for-ai) · [Fiddler Guardrails vs Akamai Firewall for AI](https://cybersectools.com/compare/akamai-firewall-for-ai-vs-fiddler-guardrails)

### 4. [Tinfoil GPT-OSS Safeguard 120B](https://cybersectools.com/tools/tinfoil-gpt-oss-safeguard-120b)

Safety reasoning model for content classification and trust & safety apps

[LLM Guardrails](https://cybersectools.com/categories/llm-guardrails) · Commercial

Key features: 8 listed. See them on the [Tinfoil GPT-OSS Safeguard 120B page](https://cybersectools.com/tools/tinfoil-gpt-oss-safeguard-120b#features).

[Tinfoil GPT-OSS Safeguard 120B alternatives](https://cybersectools.com/alternatives/tinfoil-gpt-oss-safeguard-120b) · [Fiddler Guardrails vs Tinfoil GPT-OSS Safeguard 120B](https://cybersectools.com/compare/fiddler-guardrails-vs-tinfoil-gpt-oss-safeguard-120b)

### 5. [Alice WonderFence](https://cybersectools.com/tools/alice-wonderfence)

Runtime guardrails for GenAI apps providing real-time threat detection & response

[LLM Guardrails](https://cybersectools.com/categories/llm-guardrails) · Commercial

Key features: 10 listed. See them on the [Alice WonderFence page](https://cybersectools.com/tools/alice-wonderfence#features).

[Alice WonderFence alternatives](https://cybersectools.com/alternatives/alice-wonderfence) · [Fiddler Guardrails vs Alice WonderFence](https://cybersectools.com/compare/alice-wonderfence-vs-fiddler-guardrails)

### 6. [Dynamo AI DynamoGuard](https://cybersectools.com/tools/dynamo-ai-dynamoguard)

Real-time AI guardrails platform for detecting misuse, hallucinations & attacks

[LLM Guardrails](https://cybersectools.com/categories/llm-guardrails) · Commercial

Key features: 10 listed. See them on the [Dynamo AI DynamoGuard page](https://cybersectools.com/tools/dynamo-ai-dynamoguard#features).

[Dynamo AI DynamoGuard alternatives](https://cybersectools.com/alternatives/dynamo-ai-dynamoguard) · [Fiddler Guardrails vs Dynamo AI DynamoGuard](https://cybersectools.com/compare/dynamo-ai-dynamoguard-vs-fiddler-guardrails)

### 7. [Moderation & Policy Engine](https://cybersectools.com/tools/moderation-and-policy-engine)

Content moderation & policy enforcement for LLM applications

[LLM Guardrails](https://cybersectools.com/categories/llm-guardrails) · Commercial

Key features: 10 listed. See them on the [Moderation & Policy Engine page](https://cybersectools.com/tools/moderation-and-policy-engine#features).

[Moderation & Policy Engine alternatives](https://cybersectools.com/alternatives/moderation-and-policy-engine) · [Fiddler Guardrails vs Moderation & Policy Engine](https://cybersectools.com/compare/fiddler-guardrails-vs-moderation-and-policy-engine)

### 8. [Repello AI ARGUS](https://cybersectools.com/tools/repello-ai-argus)

Runtime security platform providing guardrails for LLMs and GenAI agents.

[LLM Guardrails](https://cybersectools.com/categories/llm-guardrails) · Commercial

Key features: 10 listed. See them on the [Repello AI ARGUS page](https://cybersectools.com/tools/repello-ai-argus#features).

[Repello AI ARGUS alternatives](https://cybersectools.com/alternatives/repello-ai-argus) · [Fiddler Guardrails vs Repello AI ARGUS](https://cybersectools.com/compare/fiddler-guardrails-vs-repello-ai-argus)

## The closest 48 products like Fiddler Guardrails

The 8 above, plus:

- [Promptfoo Guardrails](https://cybersectools.com/tools/promptfoo-guardrails): Adaptive LLM guardrails that self-improve via red team feedback loops. (Commercial)
- [First Recon AI Firewall](https://cybersectools.com/tools/first-recon-ai-firewall): Inline firewall inspecting AI prompts/responses for injections & policy violations. (Commercial)
- [RealmGuard](https://cybersectools.com/tools/realm-labs-platform): AI guardrail platform detecting harmful outputs, prompt injections & policy violations. (Commercial)
- [Airia AI Platform Guardrails](https://cybersectools.com/tools/airia-ai-platform-guardrails): Runtime AI guardrails securing prompts, outputs, and agent workflows. (Commercial)
- [F5 AI Guardrails](https://cybersectools.com/tools/f5-ai-guardrails): Runtime security for AI models, agents, and data with guardrails and compliance (Commercial)
- [TrojAI Defend](https://cybersectools.com/tools/trojai-defend): AI firewall for runtime protection of AI models, applications, and agents (Commercial)
- [KELA AiFort](https://cybersectools.com/tools/kela-aifort): Security platform for LLM applications with red teaming and threat protection (Commercial)
- [Alibaba Cloud AI Guardrails](https://cybersectools.com/tools/alibaba-cloud-platform-for-ai): Real-time AI content moderation and prompt injection defense for AIGC applications. (Commercial)
- [DeepKeep LLM](https://cybersectools.com/tools/deepkeep-llm): End-to-end LLM security platform protecting against attacks and data leakage (Commercial)
- [DeepKeep](https://cybersectools.com/tools/deepkeep): Centralized governance and security platform for employee LLM interactions (Commercial)
- [Impart LLM Security](https://cybersectools.com/tools/impart-llm-security): LLM security platform detecting prompt injection, jailbreaks, and abuse (Commercial)
- [Prompt Security Platform](https://cybersectools.com/tools/prompt-security-genai-solutions): SentinelOne's Prompt Security: AI security platform plus open-source agent/LLM tools (Commercial)
- [Eroun&Company SAIFE X](https://cybersectools.com/tools/erounandcompany-saife-x): GenAI security platform protecting against data leaks and prompt attacks (Commercial)
- [Behavioral Threat Detection](https://cybersectools.com/tools/behavioral-threat-detection): Monitors GenAI user behavior patterns to detect threats across workflows (Commercial)
- [Daxa Pebblo (HPE Secure AI Factory)](https://cybersectools.com/tools/daxa-pebblo-hpe-secure-ai-factory): Shift-left AI data security gateway blocking sensitive data before LLM ingestion. (Commercial)
- [Daxa.ai Proxima](https://cybersectools.com/tools/daxaai-proxima): AI data gateway securing LLM interactions by monitoring and redacting sensitive data. (Commercial)
- [Daxa.ai Pebblo](https://cybersectools.com/tools/daxaai-pebblo): Dual-layer AI security platform for RAG chatbots covering model and retrieval. (Commercial)
- [FireTail Centralized AI Logging](https://cybersectools.com/tools/firetail-centralized-ai-logging): Aggregates & analyzes LLM logs from multiple AI providers for security & governance. (Commercial)
- [Secuvy AI Data Security](https://cybersectools.com/tools/secuvy-ai-data-security): Agentless AI data security platform preventing sensitive data leakage into LLMs. (Commercial)
- [FireGuard](https://cybersectools.com/tools/fireguard): Policy enforcement & monitoring layer for Microsoft Copilot deployments. (Commercial)
- [Starseer AI Gateway](https://cybersectools.com/tools/starseer-ai-gateway) (Commercial)
- [Calypso AI Inference Platform](https://cybersectools.com/tools/calypso-ai-inference-platform): Platform securing AI models at inference with red-teaming, defense & monitoring (Commercial)
- [CloudMatos Prompt Firewall](https://cybersectools.com/tools/cloudmatos-prompt-firewall): Firewall for LLM systems preventing prompt injection, data leaks & jailbreaks (Commercial)
- [Tumerik AI Trust Score™](https://cybersectools.com/tools/tumerik-ai-trust-scoretm): Real-time AI application security with trust scoring and guardrails (Commercial)
- [CyCraft XecGuard](https://cybersectools.com/tools/cycraft-xecguard): AI guardrail module protecting LLMs from prompt injection and jailbreak attacks (Commercial)
- [DeepKeep for AI Applications](https://cybersectools.com/tools/deepkeep-for-ai-applications): Security platform for AI applications across development and production (Commercial)
- [DeepKeep AI Firewall](https://cybersectools.com/tools/deepkeep-ai-firewall): Runtime protection firewall for AI systems and applications (Commercial)
- [VicOne xPhinx](https://cybersectools.com/tools/vicone-xphinx): Edge AI security for in-vehicle systems against prompt injection attacks (Commercial)
- [SUPERWISE Guardrails](https://cybersectools.com/tools/superwise-guardrails): Runtime guardrails for AI/LLM apps blocking violations in under 10ms (Commercial)
- [Magier AI](https://cybersectools.com/tools/magier-ai): End-to-end LLM security platform protecting GenAI interactions & applications (Commercial)
- [Gray Swan AI Security Suite](https://cybersectools.com/tools/gray-swan-ai-security-suite): Enterprise AI security suite with real-time filtering and automated testing (Commercial)
- [AIShield Guardian](https://cybersectools.com/tools/aishield-guardian): Middleware guardrail securing LLM inputs/outputs for enterprise GenAI compliance. (Commercial)
- [Protecto AI Guardrails](https://cybersectools.com/tools/protecto-ai-guardrails): AI guardrails tool for PII/PHI detection, masking & content filtering in LLM apps. (Commercial)
- [Protopia AI Stained Glass Transform](https://cybersectools.com/tools/protopia-ai-stained-glass-transform): Protects sensitive data in LLM prompts without exposing plain-text to providers. (Commercial)
- [Portkey Guardrails for Bedrock](https://cybersectools.com/tools/portkey-guardrails-for-bedrock): Configurable guardrails for Amazon Bedrock AI requests via an API gateway. (Commercial)
- [Vijil Dome](https://cybersectools.com/tools/vijil-dome): Runtime LLM guardrails blocking prompt injections, PII leakage & policy violations. (Commercial)
- [Verax Protect](https://cybersectools.com/tools/verax-protect): Platform for monitoring and securing LLMs in production environments (Commercial)
- [Check Point AI Agent Security](https://cybersectools.com/tools/check-point-lakera): Runtime security platform for GenAI apps with threat detection & guardrails (Commercial)
- [Zscaler AI Runtime Protection](https://cybersectools.com/tools/zscaler-ai-runtime-protection): Runtime protection for AI systems detecting prompt attacks & data leaks (Commercial)
- [Zscaler SPLX AI Runtime Threat Inspection](https://cybersectools.com/tools/zscaler-splx-ai-runtime-threat-inspection): Analyzes AI interaction logs for near real-time threat detection in GenAI apps (Commercial)

## Alternatives to each of these

[Aiceberg Risk Signals Library alternatives](https://cybersectools.com/alternatives/aiceberg-risk-signals-library) · [Vulcan Protect alternatives](https://cybersectools.com/alternatives/vulcan-protect) · [Akamai Firewall for AI alternatives](https://cybersectools.com/alternatives/akamai-firewall-for-ai) · [Tinfoil GPT-OSS Safeguard 120B alternatives](https://cybersectools.com/alternatives/tinfoil-gpt-oss-safeguard-120b) · [Alice WonderFence alternatives](https://cybersectools.com/alternatives/alice-wonderfence) · [Dynamo AI DynamoGuard alternatives](https://cybersectools.com/alternatives/dynamo-ai-dynamoguard) · [Moderation & Policy Engine alternatives](https://cybersectools.com/alternatives/moderation-and-policy-engine) · [Repello AI ARGUS alternatives](https://cybersectools.com/alternatives/repello-ai-argus) · [Promptfoo Guardrails alternatives](https://cybersectools.com/alternatives/promptfoo-guardrails) · [First Recon AI Firewall alternatives](https://cybersectools.com/alternatives/first-recon-ai-firewall) · [RealmGuard alternatives](https://cybersectools.com/alternatives/realm-labs-platform) · [Airia AI Platform Guardrails alternatives](https://cybersectools.com/alternatives/airia-ai-platform-guardrails)

## Other Fiddler AI products

[AI Governance, Risk Management, and Compliance alternatives](https://cybersectools.com/alternatives/ai-governance-risk-management-and-compliance)

## Compare Fiddler Guardrails with

- [Fiddler Guardrails vs Aiceberg Risk Signals Library](https://cybersectools.com/compare/aiceberg-risk-signals-library-vs-fiddler-guardrails)
- [Fiddler Guardrails vs Vulcan Protect](https://cybersectools.com/compare/fiddler-guardrails-vs-vulcan-protect)
- [Fiddler Guardrails vs Akamai Firewall for AI](https://cybersectools.com/compare/akamai-firewall-for-ai-vs-fiddler-guardrails)
- [Fiddler Guardrails vs Tinfoil GPT-OSS Safeguard 120B](https://cybersectools.com/compare/fiddler-guardrails-vs-tinfoil-gpt-oss-safeguard-120b)
- [Fiddler Guardrails vs Alice WonderFence](https://cybersectools.com/compare/alice-wonderfence-vs-fiddler-guardrails)
- [Fiddler Guardrails vs Dynamo AI DynamoGuard](https://cybersectools.com/compare/dynamo-ai-dynamoguard-vs-fiddler-guardrails)
- [Fiddler Guardrails vs Moderation & Policy Engine](https://cybersectools.com/compare/fiddler-guardrails-vs-moderation-and-policy-engine)
- [Fiddler Guardrails vs Repello AI ARGUS](https://cybersectools.com/compare/fiddler-guardrails-vs-repello-ai-argus)

## Fiddler Guardrails Alternatives FAQ

### What are the closest alternatives to Fiddler Guardrails?

The closest matches to Fiddler Guardrails by shared tags and NIST CSF 2.0 coverage are Aiceberg Risk Signals Library, Vulcan Protect, Akamai Firewall for AI, Tinfoil GPT-OSS Safeguard 120B, and Alice WonderFence. All of them are LLM Guardrails products.

### How many alternatives to Fiddler Guardrails are available?

This page shows 48 alternatives to Fiddler Guardrails, all in the LLM Guardrails category. Each one is matched on shared tags and NIST CSF 2.0 areas, and the closest matches rank first.

### Is Fiddler Guardrails free or commercial?

Fiddler Guardrails is a commercial LLM Guardrails product. It needs a paid license or subscription. Only commercial alternatives are listed here. Free and open source products are under /free.

### What type of solution is Fiddler Guardrails?

Fiddler Guardrails is a LLM Guardrails product in the AI Security category. You can compare it with the 48 other LLM Guardrails products on this page.

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Source: https://cybersectools.com/alternatives/fiddler-guardrails

For AI agents: every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md, and any product or compare page has a Markdown copy too (add .md to its URL).

More on Fiddler Guardrails and its alternatives: funding, momentum, hiring and news, plus the full product and company record, are available through the Mandos MCP Server (paid plans), which connects to AI assistants: https://mandos.io/mcp?utm_source=cybersectools.com&utm_medium=alternatives-md