Silmaril is a runtime prompt-injection defense for AI applications and agents, headquartered in San Francisco, United States, founded in 2026.
| Date | Round | Amount | Investors |
|---|---|---|---|
| 2026-06-16 | Pre-Seed | $500K | Y Combinator |
Data from The Signal by Return on Security — cybersecurity funding, M&A activity, and company intelligence.