Business

Reific

Website
Founded 2026Origin source ↗Checked 2026-11-09

Overview

Reific builds RL environments for superhuman reasoning over time, for the frontier labs that train agents. Each comes from real, de-identified records (health data, industrial sensors, compute-cluster logs), in three families: personal agents, industry, and science and compute. The world keeps moving while the agent works, so the agent must keep learning: data arrive on a clock, and every answer is checked against what actually happened. In each family, the best frontier model averages below half, and models that train on our environments improve.

We specialise in time series because almost everything that matters is recorded that way: a heartbeat, a power grid, a factory line, a GPU cluster, an experiment. No person can turn thousands of moving signals at once into the state of a system and what happens next. AI can pass the bar exam, but it still can’t watch a system for weeks and act at the right moment. It learned from what people wrote down, in environments that freeze the world and abstract it to our understanding.

Time series let us ride the exponential. The world records new data every second and time keeps grading, so each generation of models gets harder, fresher tasks. We believe humans always strive to explore. Our mission is to build the infrastructure for that exploration: the layer of the AI stack where models keep improving, out into what no one understands yet.

Company description As recorded 2026-11-08

Founders & team

Antanas Žilinskas

Founder/CEO

I’m the founder and CEO of Reific (YC F26): RL environments for superhuman reasoning over time. I’m first author of two ICLR 2026 papers on rare-event forecasting (SOTA results). Before Reific, I co-founded Entangl (YC S24) as CTO, taking AI for mission-critical engineering from prototype to Fortune 500 deployments. I led the engineering and launch of Orion, the UK’s most powerful student-built rocket, and simulated superconductors at CERN. MEng, Imperial College London, ranked 1st in my cohort.

Founder profile As recorded 2026-11-09
1team members reported
Source-reported As recorded 2026-11-09

Founded 2026 · Source

News & product activity

Sources & observations

Y Combinator

Profile depthverified profile
Website observationwebsite reachable
Last website check2026-11-11
Location · source statedSan Francisco, CA, USA
Pricing evidenceNo pricing page confirmed
Maturity: Not assessed · 2 of 6 areas documented

Source-based assessment · automated evidence rules

The retained text does not establish product availability or customer use.

Maturity is an evidence-based assessment, not a success rating. It may understate the current stage where evidence is limited. Coverage records documented areas, not a complete or independently audited company history.

  • Product overviewSource description Checked 2026-11-11
  • Product visualsNot documented
  • Founders & originsTeam information
  • Business model & pricingNot documented
  • Funding & ownershipNot documented
  • Dated milestonesNot documented
Stage definitions
independent websitesource corroborationreachable websitedescriptive evidencesourced peoplesourced founding year