Silmaril (Founding)
Funding Details
Awarder
YCombinator
Date Award
April 9, 2026
Vertical
B2B
Company Info
Founding Year
2026
Market
B2B
Location
San Francisco, CA, USA
Coinvestors
YCombinator
Company Description

Silmaril is self-healing 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.

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