Nuntius
YC S25 · Inactive · Making Models Follow Rules.
Competitors
| Company | Category | Status | Program |
|---|---|---|---|
 RiftenShared: reinforcement learning, model, intelligenceActiveAI, Devtools | AI, Devtools | Active | YCS26 |
 Incredible LabsShared: artificial intelligenceNot statedAI | AI | Not stated | 500 Global2011 |
 EON ProtocolShared: artificial intelligenceNot statedAI | AI | Not stated | Antler2024 |
 MonkeyLearnShared: artificial intelligenceNot statedAI, Devtools | AI, Devtools | Not stated | 500 Global2015 |
Adjacent
| Company | Category | Status | Program |
|---|---|---|---|
 SynthShared: reinforcement learning, model, infrastructureActiveAI, Devtools | AI, Devtools | Active | YCF24 |
 UnifyShared: reinforcement learning, modelActiveAI, Devtools | AI, Devtools | Active | YCW23 |
 Experiential LabsShared: reinforcement learning, model, infrastructureActiveAI, Devtools | AI, Devtools | Active | YCS26 |
 TraverseShared: reinforcement learning, solvingActiveAI | AI | Active | YCW26 |
 FreesoloShared: reinforcement learning, modelActiveAI, Devtools | AI, Devtools | Active | YCX25 |
Also from S25 in AI
All of S25| Company | Category | Status |
|---|---|---|
 idlerHill-climb any benchmark, for any model, in any domain.ActiveAI, Devtools | AI, Devtools | Active |
 MonteContinual Learning for AgentsActiveAI, Devtools | AI, Devtools | Active |
 TopologicalPhysics-based foundation models for CAD optimization.ActiveAI, Devtools | AI, Devtools | Active |
 AcrelyEnterprise Voice AgentsActiveAI | AI | Active |
 AdaptionalAI-powered insurance claims reviewActiveAI | AI | Active |
 AgentMailEmail Inboxes for AI AgentsActiveAI, Devtools | AI, Devtools | Active |
About Nuntius
Applying artificial intelligence to economically productive use-cases requires bulletproof alignment. We’re solving that.
- YC batch
- S25 · Summer 2025
- Status, per YC
- Inactive
- Category
- AI, Developer tools
- Team size
- 2
- Location
- San Francisco, CA, USA
- Founded
- 2025
- Checked
- 33m ago
Nuntius: questions
Which YC batch was Nuntius in?
Nuntius was in Y Combinator's Summer 2025 batch (S25).
Is Nuntius still active?
Y Combinator lists Nuntius as inactive.
Where is Nuntius based?
Nuntius lists San Francisco, CA, USA as its location on YC's directory.
Sources: each program's public company list, read twice a week. Not affiliated with Y Combinator or any other program. Logos via logo.dev; trademarks belong to their owners.