Top accelerator startups

Startups14,448Programs29

14,448 startups · 29 programs

rekursiv.ai

Active · Scale AI scientists whose own breakthroughs accelerate the next.

WebsiteYC profile

Why it ranks

How the rank works
8signal of 100 · rising 8
  • team of 5Team size · YC's directory+4
  • went through YCProgram · this site+4

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

Competitors

AIAgentin AIShared: foundational modelYC W25San FranciscoStartup →AIGrep AIShared: self improving, scale, productivityYC F26San FranciscoStartup →AIVaani AIShared: foundational modelGoogle AI First India 2025ResearchStartup →AIParadev (formerly Superset)Shared: self improving, scaling, sourceYC X26San FranciscoStartup →AICashew LabsShared: self improving, source, modelYC X25San FranciscoStartup →
Companies closest to rekursiv.ai
Company
Agentin AIShared: foundational modelYC W25ActiveAI
Grep AIShared: self improving, scale, productivityYC F26ActiveAI
Vaani AIShared: foundational modelGoogle AI First India 2025Not statedAI
Paradev (formerly Superset)Shared: self improving, scaling, sourceYC X26ActiveAI, Devtools
Cashew LabsShared: self improving, source, modelYC X25ActiveAI, Devtools

Adjacent

AISapling.aiShared: deep learning, machine learning, modelYC W19Los AngelesStartup →OtherFlintShared: self improvingNeoStartup →AIReincarnateShared: scientist, acceleratePlug and PlayUnited StatesStartup →AIArtificial SocietiesShared: foundational model, experimentYC W25LondonStartup →AIHeliumShared: self improving, experimentYC S24San FranciscoStartup →
Companies next to rekursiv.ai
Company
Sapling.aiShared: deep learning, machine learning, modelYC W19ActiveAI
FlintShared: self improvingNeo Not statedOther
ReincarnateShared: scientist, acceleratePlug and Play Not statedAI
Artificial SocietiesShared: foundational model, experimentYC W25ActiveAI, Data
HeliumShared: self improving, experimentYC S24ActiveAI

Also from S26 in AI

All of S26
AIAgnost AIWe find where AI agents fail, then train better models to run them.YC S26San FranciscoStartup →AIAutoresearch, Inc.Autoresearch as a service: we solve your hardest measurable problemsYC S26San FranciscoStartup →AIBelvedirAutonomous AI Model TrainingYC S26San FranciscoStartup →AICoArenaThe biggest crowdsourced benchmark for Computer-UseYC S26San FranciscoStartup →AIDatoricThe training data R&D engine for physical AIYC S26San FranciscoStartup →AIDeepReach Inc.Network for Physical AI Data BusinessYC S26San FranciscoStartup →
Company
Agnost AIWe find where AI agents fail, then train better models to run them.2 programsteam of 2ActiveAI, Data, Devtools
Autoresearch, Inc.Autoresearch as a service: we solve your hardest measurable problemsteam of 3ActiveAI, Devtools
BelvedirAutonomous AI Model Trainingteam of 2ActiveAI
CoArenaThe biggest crowdsourced benchmark for Computer-Useteam of 2ActiveAI, Data, Devtools
DatoricThe training data R&D engine for physical AIteam of 2ActiveAI, Data
DeepReach Inc.Network for Physical AI Data Businessteam of 6hiringActiveAI

Founders

  • Joshua DillonFounder
  • Dan KondratyukFounder

About rekursiv.ai

We're scaling self-improving AI scientist teams to ideate/experiment/discover, generating new knowledge autonomously. Their discoveries reduced ARC-1/2 costs by 10,000× while maintaining state-of-the-art accuracy and yielded material advances on combinatorial ML problems. We believe that AI is bounded not by compute, but ideas. Scaling to millions of sessions of discovery enables leveraging its own discoveries and presents a novel training source capable of ushering a new era of self-reliant foundational models.

YC batch
S26 · Summer 2026
Status, per YC
Active
Category
AI
Team size
5
Location
San Francisco, CA, USA
Founded
2026
Checked
7h ago

YC tags: Deep Learning, Machine Learning, AI

Changes seen

TagsOct 19, 2026

Newly tagged AI; no longer tagged Artificial Intelligence.

Source ↗

rekursiv.ai in S26: 229 companies, 88% AI

GitHub LinkedIn

rekursiv.ai: questions

Which YC batch was rekursiv.ai in?

rekursiv.ai was in Y Combinator's Summer 2026 batch (S26).

Is rekursiv.ai still active?

Y Combinator lists rekursiv.ai as active.

Who founded rekursiv.ai?

rekursiv.ai's founders, as listed on its YC page: Joshua Dillon (Founder), Dan Kondratyuk (Founder).

Where is rekursiv.ai based?

rekursiv.ai lists San Francisco, CA, USA as its location on YC's directory.