Top accelerator startups

Startups14,448Programs29

14,448 startups · 29 programs

Jcode

Active · High performance coding agents

WebsiteYC profile

Why it ranks

How the rank works
4signal of 100 · rising 4
  • went through YCProgram · this site+4

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

Competitors

AIReplicasShared: agent harness, claude code, coding agentYC X26San FranciscoStartup →AIRox AIShared: agent swarmSPC 2024San FranciscoStartup →AIBoxes.devShared: agent swarm, claude code, coding agentYC F26San FranciscoStartup →AISynthShared: agent harness, coding agent, performanceYC F24San FranciscoStartup →AICentauri AIShared: claude code, coding agent, developerYC W24San FranciscoStartup →OtherRWXShared: coding agent, codeStartup →
Companies closest to Jcode
Company
ReplicasShared: agent harness, claude code, coding agentYC X26ActiveAI, Devtools
Rox AIShared: agent swarmSPC 2024 +2Not statedAI
Boxes.devShared: agent swarm, claude code, coding agentYC F26ActiveAI, Devtools
SynthShared: agent harness, coding agent, performanceYC F24ActiveAI, Devtools
Centauri AIShared: claude code, coding agent, developerYC W24ActiveAI, Devtools
RWXnot in a program hereShared: coding agent, codeElsewhereOther

Adjacent

AIAcquiredContinueShared: coding agentYC S23San FranciscoStartup →AIToposShared: agent swarmYC F26San FranciscoStartup →AIGrumaticShared: claude code, coding agent, developerPlug and PlayUnited StatesStartup →AICompyleShared: claude code, coding agentYC F25San FranciscoStartup →AIAlchemyst AIShared: multi agentAntler 2025SingaporeStartup →
Companies next to Jcode
Company
ContinueShared: coding agentYC S23AcquiredAI, Devtools
ToposShared: agent swarmYC F26ActiveAI
GrumaticShared: claude code, coding agent, developerPlug and Play Not statedAI, Devtools
CompyleShared: claude code, coding agentYC F25ActiveAI, Devtools
Alchemyst AIShared: multi agentAntler 2025Not statedAI

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 →AIArchalAPI sandboxes, built for AI agentsYC S26San FranciscoStartup →AIAutoresearch, Inc.Autoresearch as a service: we solve your hardest measurable problemsYC S26San FranciscoStartup →AICodagThe AI gateway for cheaper, faster, permissioned agents.YC S26San FranciscoStartup →AIConiferIntelligent decisions for critical AI operationsYC S26San FranciscoStartup →AIGitCafeThe Git forge for the next hundred billion commitsYC S26San FranciscoStartup →
Company
Agnost AIWe find where AI agents fail, then train better models to run them.2 programsteam of 2ActiveAI, Data, Devtools
ArchalAPI sandboxes, built for AI agentsteam of 2ActiveAI, Devtools
Autoresearch, Inc.Autoresearch as a service: we solve your hardest measurable problemsteam of 3ActiveAI, Devtools
CodagThe AI gateway for cheaper, faster, permissioned agents.ActiveAI, Devtools
ConiferIntelligent decisions for critical AI operationsteam of 4ActiveAI, Devtools
GitCafeThe Git forge for the next hundred billion commitsteam of 2ActiveAI, Devtools

Founders

  • Jeremy HuangFounder/CEO

About Jcode

Jcode is a high-performance coding-agent harness that makes it possible for developers to scale up multi-agent/swarm workflows. It's built from the ground up with a different architecture to solve the memory bottleneck (it's 20x more memory efficient than Claude Code) that has kept agent swarms from going mainstream. It has 20K GitHub stars, and throughputs $1mil per month of inference spend

YC batch
S26 · Summer 2026
Status, per YC
Active
Category
AI, Developer tools
Team size
1
Location
San Francisco, CA, USA
Founded
2026
Checked
6h ago

YC tags: Developer Tools, AI

Changes seen

TagsOct 19, 2026

Newly tagged AI; no longer tagged Artificial Intelligence.

Source ↗

Jcode in S26: 229 companies, 88% AI

LinkedIn

Jcode: questions

Which YC batch was Jcode in?

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

Is Jcode still active?

Y Combinator lists Jcode as active.

Who founded Jcode?

Jcode's founders, as listed on its YC page: Jeremy Huang (Founder/CEO).

Where is Jcode based?

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