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14,448 startups · 29 programs

Vassar Robotics

Active · Gearless robot joints for better embodied AI.

WebsiteYC profile

Why it ranks

How the rank works
7signal of 100 · rising 4
  • 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

AIRnDcircleShared: research labsAntler 2023KoreaStartup →AIJigsawShared: research labs, training dataspeedrun SR005San FranciscoStartup →
Companies closest to Vassar Robotics
Company
RnDcircleShared: research labsAntler 2023Not statedAI
JigsawShared: research labs, training dataspeedrun SR005Not statedAI, Data

Adjacent

OtherOdin RoboticsShared: learned skill, robot, armsYC F26San FranciscoStartup →AITuesday LabsShared: robot, consumer electronicsYC W24New York CityStartup →AIInnateShared: robot, building, consumer electronicsYC F24San FranciscoStartup →AIMaxinsightsShared: training dataSPC 2025San FranciscoStartup →OtherAcquiredHappiLabsShared: research labsYC S18San FranciscoStartup →
Companies next to Vassar Robotics
Company
Odin RoboticsShared: learned skill, robot, armsYC F26ActiveOther
Tuesday LabsShared: robot, consumer electronicsYC W24ActiveAI
InnateShared: robot, building, consumer electronicsYC F24ActiveAI, Devtools
MaxinsightsShared: training dataSPC 2025Not statedAI, Devtools
HappiLabsShared: research labsYC S18AcquiredOther

Also from X25 in AI

All of X25
AIAcoliteAI Native Commercial Insurance BrokerYC X25PhiladelphiaStartup →AIAdentrisReal-time AI Compliance & Revenue Integrity for Medical ProvidersYC X25San FranciscoStartup →AIAegisAI Agents to win denied health insurance claims.YC X25San FranciscoStartup →AIAirweaveThe open-source context retrieval layer for agentsYC X25San FranciscoStartup →AIAlkaliThe smarter way to estimate steel.YC X25HoustonStartup →AIAlmondAmerica's robot factoryYC X25San FranciscoStartup →
Company
AcoliteAI Native Commercial Insurance Brokerteam of 3ActiveAI
AdentrisReal-time AI Compliance & Revenue Integrity for Medical Providersteam of 5hiringActiveAI
AegisAI Agents to win denied health insurance claims.team of 3ActiveAI
AirweaveThe open-source context retrieval layer for agentsteam of 7hiringActiveAI, Devtools
AlkaliThe smarter way to estimate steel.team of 2hiringActiveAI, Devtools
AlmondAmerica's robot factoryteam of 6hiringActiveAI

Founders

  • Charles YongFounder/CEO

About Vassar Robotics

Vassar Robotics is building gearless robot joints and arms using high-torque transverse-flux motors. Eliminating gearboxes makes robots more precise, reliable, affordable, and easier to simulate. We’re starting with AI research labs and robot developers, helping them collect better training data and transfer learned skills from simulation to the real world.

YC batch
X25 · Spring 2025
Status, per YC
Active
Category
AI, Developer tools
Team size
2
Location
Boston, MA, USA
Founded
2025
Checked
7h ago

Changes seen

HeadquartersOct 29, 2026

Moved its headquarters from Los Angeles, CA, USA to Boston, MA, USA.

Source ↗
Team sizeOct 26, 2026

Team went from 3 to 2 people.

Source ↗
One-linerOct 26, 2026

Rewrote its one-liner; it read "Open-source semi-humanoid dev kit → home data → autonomy → 20h/wk"

Source ↗
CategoryOct 26, 2026

Category changed from devtools to ai.

Source ↗

Vassar Robotics in X25: 144 companies, 90% AI

Vassar Robotics: questions

Which YC batch was Vassar Robotics in?

Vassar Robotics was in Y Combinator's Spring 2025 batch (X25).

Is Vassar Robotics still active?

Y Combinator lists Vassar Robotics as active.

Who founded Vassar Robotics?

Vassar Robotics's founders, as listed on its YC page: Charles Yong (Founder/CEO).

Where is Vassar Robotics based?

Vassar Robotics lists Boston, MA, USA as its location on YC's directory.