ElevenAgents Guardrails vs Sublime Security
Side-by-side comparison of features, pricing, and ratings
At a glance
| Dimension | ElevenAgents Guardrails | Sublime Security |
|---|---|---|
| Core Function | Real-time voice agent policy enforcement & prompt injection protection | AI-driven email security for BEC, phishing & social engineering detection |
| Pricing | Freemium (usage-based for paid tiers) | Paid (contact sales) |
| Target User | Enterprise teams deploying voice agents at scale | Security teams in mid-to-large enterprises |
| Key Protection Levels | System prompt, user input, agent response (3 levels) | Email content, sender behavior, conversation analysis |
| Customization | Natural language custom guardrails | YARA-like detection rules (Sublime Script) |
| Integrations | Twilio, Exotel, Slack, WhatsApp, OAuth, etc. | Microsoft 365, Google Workspace |
Choose ElevenAgents Guardrails if you need real-time safety controls for voice agents—especially with custom guardrails in natural language and support for multiple telephony integrations. Choose Sublime if your priority is advanced email threat detection with low false positives and deep custom detection rules. They address entirely different domains: voice agent compliance vs. email security.
Real-time guardrails that stop prompt injection, content violations, and drift in ElevenLabs voice agents.
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Who should pick which
- Enterprise deploying voice agents for customer supportPick: ElevenAgents Guardrails
Guardrails provides real-time policy enforcement across system prompt, user input, and agent responses, with telephony integrations (Twilio, Exotel) and natural language custom guardrails suitable for compliance-heavy voice workflows.
- SOC analyst combating BEC and phishingPick: Sublime Security
Sublime's AI-powered email threat detection with conversational analysis and low false positives directly addresses BEC/VEC. Custom detection rules (Sublime Script) enable tailored hunting and automated response.
- Developer building a voice agent with safety needsPick: ElevenAgents Guardrails
Guardrails offers pre-built and custom guardrails, configurable exit strategies, and multiple execution modes, giving developers granular control over agent behavior in real-time.
- IT team modernizing email security stackPick: Sublime Security
Sublime integrates with M365 and Google Workspace, provides deep visibility and a threat hunting interface, positioning as a modern alternative to legacy gateways like Proofpoint.
- Compliance officer for call centerPick: ElevenAgents Guardrails
Features like Content Guardrails with tunable thresholds, conversation history redaction, and Zero Retention Mode address compliance requirements for voice call recordings and sensitive data handling.
Frequently Asked Questions
ElevenAgents Guardrails vs Sublime Security: which should you choose?
Choose ElevenAgents Guardrails if you need real-time safety controls for voice agents—especially with custom guardrails in natural language and support for multiple telephony integrations. Choose Sublime if your priority is advanced email threat detection with low false positives and deep custom detection rules. They address entirely different domains: voice agent compliance vs. email security.
What is the main difference between ElevenAgents Guardrails and Sublime Security?
Guardrails protects voice agent conversations in real-time (system prompt, user input, agent response). Sublime protects email communications from advanced threats like BEC and phishing. They operate in completely different domains.
Does ElevenAgents Guardrails integrate with email platforms?
No, Guardrails integrates with telephony (Twilio, Exotel), messaging (Slack, WhatsApp), and authentication protocols. It does not integrate with Microsoft 365 or Google Workspace.
Can Sublime Security detect prompt injection?
No, Sublime detects email-based social engineering (BEC, VEC, phishing). Prompt injection is a voice agent attack mitigated by Guardrails' Manipulation Guardrail.
Which tool supports custom detection rules?
Both: Guardrails uses natural language for custom guardrails; Sublime uses Sublime Script (YARA-like language) for custom detection rules.
Which tool is more suitable for a small business?
ElevenAgents Guardrails has a freemium model, making it more accessible for small-scale voice agent testing. Sublime is contact-priced and tailored for mid-to-large enterprises.
Does ElevenAgents Guardrails support multi-step workflows?
Yes, as of June 30, 2026, Procedures were introduced in ElevenAgents for multi-step workflow patterns, which can work alongside guardrails.
What are the exit strategies in Guardrails?
Configurable: end, transfer, escalate, retry. These actions occur when a guardrail violation is triggered.
Does Sublime Security offer real-time detection?
Yes, Sublime provides real-time threat detection and automated incident response for email threats.
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Last reviewed: July 3, 2026