Startupsby GlyphWhy it ranks
How the rank works7signal of 100 · rising 7
- went through YCProgram · this site+4
- team of 2Team size · YC's directory+2.5
A sum of public facts, not a judgement and not investment advice.
Competitors
| Company | Category | Status | Program |
|---|---|---|---|
| AI, Devtools | Active | YCX25 | |
| AI, Devtools | Active | YCS21 |
Adjacent
| Company | Category | Status | Program |
|---|---|---|---|
| Devtools | Not stated | Plug and Play | |
| AI, Devtools | Active | YCX25 | |
| AI, Devtools | Active | YCF26 | |
| AI | Active | YCF24 | |
| Other | Inactive | YCS20 |
Also from X26 in AI
All of X26Founders
- Aum UpadhyayFounder/CEO
- Eduardo VelascoFounder/CTO
About Silmaril
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.
- YC batch
- X26 · Spring 2026
- Status, per YC
- Active
- Category
- AI
- Team size
- 2
- Location
- San Francisco, CA, USA
- Founded
- 2026
- Checked
- 8h ago
Silmaril: questions
Which YC batch was Silmaril in?
Silmaril was in Y Combinator's Spring 2026 batch (X26).
Is Silmaril still active?
Y Combinator lists Silmaril as active.
Who founded Silmaril?
Silmaril's founders, as listed on its YC page: Aum Upadhyay (Founder/CEO), Eduardo Velasco (Founder/CTO).
Where is Silmaril based?
Silmaril lists San Francisco, CA, USA as its location on YC's directory.