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Silmaril

Founders

Eduardo VelascoAum Upadhyay

Silmaril is the world's first self-healing prompt injection defense for AI-native applications and agents. Unlike static guardrails that pattern-match known threats, Silmaril understands application context and execution outcomes, blocking 2x more attacks at 10x lower latency. It integrates with agentic frameworks like LangGraph and LangChain in just 5 lines of code, and continuously retrains on real-world attack data to autonomously defend against novel and emerging threats.

Company Founded in 2025

SaaS iconSaaS

Articles about Silmaril

Self-Improving AI Security Firewall Tackles Runtime Threats

Self-Improving AI Security Firewall Tackles Runtime Threats

SaaS iconSaaSJun 27, 2026
YC's Silmaril Debuts Self-Healing Defense Against AI Prompt Attacks

YC's Silmaril Debuts Self-Healing Defense Against AI Prompt Attacks

SaaS iconSaaSJun 20, 2026
Silmaril's Self-Healing Defense Blocks AI Prompt Injection Attacks

Silmaril's Self-Healing Defense Blocks AI Prompt Injection Attacks

SaaS iconSaaSJun 7, 2026
AI's Top Security Flaw Gets New Defense as Agent Attacks Surge

AI's Top Security Flaw Gets New Defense as Agent Attacks Surge

SaaS iconSaaSMay 24, 2026
YC's Silmaril Launches Self-Healing AI Security as Agent Attacks Surge

YC's Silmaril Launches Self-Healing AI Security as Agent Attacks Surge

SaaS iconSaaSMay 6, 2026

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