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YC SP26 · Active

Silmaril

Security for agents that self-improves

Class
Spring 2026
Status
Active
Industry
B2B
Location
San Francisco, CA, USA
Team size
2

Website

https://silmaril.dev

About

Silmaril is the first security for agents that self-improves. 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.