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Silmaril

Prompt injection defense that is self-healing

Silmaril is a self-healing app-layer prompt injection defense for AI native applications and agents. It understands application context to block 2x as many threats as current SOTA defenses with 10x lower latency. Customers plug us into agentic frameworks like LangGraph with 5 lines of code. Silmaril has stopped $28M of damages for customers.
Active Founders
Aum Upadhyay
Aum Upadhyay
Founder
Co-Founder & CEO at Silmaril. I built the security and privacy framework at AWS that prevented over $1.8B in damages. Now I bring that same defensive mindset to Silmaril, working with customers to ship prompt injection defense.
Eduardo Velasco
Eduardo Velasco
Founder
Co-Founder & CTO at Silmaril, the world's first self-healing prompt injection defense. I prove the risks are real by finding exploits myself. I chained a prompt injection into root access inside ChatGPT. Ex-Amazon tech lead specializing in low latency ML models that generated $400M in annual revenue.
Silmaril
Founded:2026
Batch:Spring 2026
Team Size:2
Status:
Active
Location:San Francisco
Primary Partner:Garry Tan