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Startups14,448Programs29

14,448 startups · 29 programs

Symplex

Acquired · Applied Reinforcement Learning Research Laboratory

YC profile

Why it ranks

How the rank works
13signal of 100 · rising 2
  • team of 8Team size · YC's directory+4.9
  • acquiredOutcome · YC, program pages, Acquisitions+4
  • went through YCProgram · this site+4

A sum of public facts, not a judgement and not investment advice.

Competitors

AICartpoleShared: reinforcement learningYC X25San FranciscoStartup →AIRunRLShared: reinforcement learningYC X25San FranciscoStartup →AIOsmosisShared: reinforcement learningYC W25San FranciscoStartup →AIOsseusShared: reinforcement learning, data engineering, researchYC S26LondonStartup →AIDeepAware AI (Robotics Center of Silicon Valley)Shared: reinforcement learning, data engineering, researchYC S25San FranciscoStartup →OtherPrime IntellectShared: reinforcement learningStartup →OtherDeepMindShared: research laboratory, acquiredStartup →OtherSurge AIShared: reinforcement learningStartup →
Companies closest to Symplex
Company
CartpoleShared: reinforcement learningYC X25ActiveAI, Data
RunRLShared: reinforcement learningYC X25ActiveAI, Devtools
OsmosisShared: reinforcement learningYC W25ActiveAI, Devtools
OsseusShared: reinforcement learning, data engineering, researchYC S26ActiveAI, Data
DeepAware AI (Robotics Center of Silicon Valley)Shared: reinforcement learning, data engineering, researchYC S25ActiveAI, Data
Prime Intellectnot in a program hereShared: reinforcement learningElsewhereOther
DeepMindnot in a program hereShared: research laboratory, acquiredElsewhereOther
Surge AInot in a program hereShared: reinforcement learningElsewhereOther

Adjacent

Developer toolsVmaxShared: reinforcement learningSPC 2025San FranciscoStartup →Developer toolsPreference ModelShared: reinforcement learningSPC 2025San FranciscoStartup →OtherPhantasma LabsShared: reinforcement learningEF 2018BerlinStartup →OtherAgileRLShared: reinforcement learningEF 2023LondonStartup →AIUnsloth AIShared: reinforcement learningYC S24San FranciscoStartup →
Companies next to Symplex
Company
VmaxShared: reinforcement learningSPC 2025Not statedDevtools
Preference ModelShared: reinforcement learningSPC 2025Not statedDevtools
Phantasma LabsShared: reinforcement learningEF 2018Not statedOther
AgileRLShared: reinforcement learningEF 2023Not statedOther
Unsloth AIShared: reinforcement learningYC S24ActiveAI, Devtools

Also from S19 in AI

All of S19
AIAcquiredEmbraceModern user-focused observability built on OpenTelemetryYC S19Los AngelesStartup →AIInactiveFigmentsBuilding worlds at technological inflection pointsYC S19Los AngelesStartup →AITRM LabsTRM is building a safer world for billions of people.YC S19San FranciscoStartup →AIArpeggio BioArpeggio Bio develops drugs targeting transcription factors using AI…YC S19BoulderStartup →AIInactiveAudioFocusHearing aids that work in noisy places, like restaurants, using ML.YC S19San FranciscoStartup →AIBeaconsAn AI-powered, all-in-one business platform for content creatorsYC S19San FranciscoStartup →
Company
EmbraceModern user-focused observability built on OpenTelemetryteam of 62acquiredAcquiredAI, Data, Devtools
FigmentsBuilding worlds at technological inflection pointsteam of 2InactiveAI
TRM LabsTRM is building a safer world for billions of people.team of 400hiringActiveAI, Data
Arpeggio BioArpeggio Bio develops drugs targeting transcription factors using AI…team of 20ActiveAI
AudioFocusHearing aids that work in noisy places, like restaurants, using ML.team of 4InactiveAI
BeaconsAn AI-powered, all-in-one business platform for content creatorsteam of 25hiringActiveAI

About Symplex

• Acquired by Scale AI

YC batch
S19 · Summer 2019
Status, per YC
Acquired
Category
AI, Data
Team size
8
Location
New York City, NY, USA
Checked
6h ago

YC tags: Data Engineering, AI, AI Assistant

Changes seen

TagsOct 19, 2026

Newly tagged AI; no longer tagged Artificial Intelligence.

Source ↗

Symplex in S19: 176 companies, 26% AI

Symplex: questions

Which YC batch was Symplex in?

Symplex was in Y Combinator's Summer 2019 batch (S19).

Is Symplex still active?

Y Combinator lists Symplex as acquired.

Where is Symplex based?

Symplex lists New York City, NY, USA as its location on YC's directory.