Fundraising Fox
/Companies
Sign in

OS3

YC S26

San Francisco, US · Founded 2025 · 2 employees · Hiring · 1 known investors

Find your way into OS3

Sign up to see every warm intro you have to OS3

  • Paths you didn't know you had: your email and LinkedIn already hold routes to the OS3 team. We find them for you
  • 2nd- and 3rd-degree connections: the friend-of-a-friend routes that take hours to manually find through your inbox or LinkedIn
  • Answers now, not in days: momentum is everything in a raise. Skip asking around whether someone knows someone

Days of research, done the moment you sign in, with every route ranked by how warm it is.

Sign up with GoogleAlready have an account? Log in

OS3 develops hardware robots and AI models for autonomous deployment in real-world environments. The company designs its own robot hardware and trains models using human demonstration videos and reinforcement learning.

Also known as Observee, Inc. · Observee

Advanced ManufacturingAI & Machine LearningHardwareRoboticsArtificial IntelligenceB2BUnited States of AmericaAmerica / Canada

Founders & leadership· Y Combinator alumni (S26)

OS3 was founded in 2025 by Rishabh Chanana and Chris Hailey.

RCRishabh Chanana
Rishabh ChananaCo-FounderRishabh Chanana holds a graduate degree in Robotics and AI from UCSD, where he conducted NLP research with the CSG Lab in collaboration with Harvard Medical School and Georgia Tech. He previously trained large language models at ServiceNow and has designed machine learning systems; he now leads robotics development at OS3.
CHChris Hailey
Chris HaileyCo-FounderChris Hailey is a co-founder at OS3 who previously worked as a software engineer at Coinbase on the asset addition team. He holds an undergraduate degree in computer science from USC.
RS
Rajmeet Singh Chandok

Investors · 1

Related companies · 6

Yummy FutureYummy Future builds automated robotic café systems and software for beverage service in public venues. The company operates kiosks that produce specialty drinks with consistent quality at high throughput, targeting locations like office buildings, campuses, and transit hubs.
Nothing TechNothing designs and sells consumer electronics, including its Phone line of smartphones, sold directly through its own website.
DartboardDartboard Energy processes raw alarms and state data from industrial systems into classified events with audit trails, eliminating manual log reconstruction for energy and industrial operations. The platform reads data from data lakes, historians, and energy management systems, then writes structured events back to existing workflow tools.
Orangewood LabsOrangewood develops industrial robots for bin picking, visual inspection, powder coating, bartending, and spray painting tasks. The company targets manufacturing and industrial operations seeking to automate repetitive or hazardous tasks.
RobocurveRobocurve develops open-source tools and benchmarks for evaluating the real-world capabilities of AI systems and robots. The company serves robotics labs and the broader public by providing independent, rigorous evaluation frameworks to assess progress in physical AI and general-purpose robotics.
DeepReach Inc.DeepReach runs a data-collection network where individuals ("Data Partners") wear a shipped device to record real-world operation data and get paid per accepted task. The captured data supports AI/machine-learning training use cases, with contributors operating across dozens of countries.

Companies working in the same space as OS3.

Legal entities · 1

corporate structure
Observee, Inc.

Frequently asked questions

What does OS3 do?
OS3 develops hardware robots and AI models for autonomous deployment in real-world environments. The company designs its own robot hardware and trains models using human demonstration videos and reinforcement learning.
Who founded OS3?
OS3 was founded by Rishabh Chanana, Chris Hailey in 2025.
Who are OS3's investors?
OS3's investors include Y Combinator.
Where is OS3 headquartered?
OS3 is headquartered in San Francisco, US.