Top accelerator startups

Startups14,448Programs29

14,448 startups · 29 programs

Synth

Active · Prompt and Context Optimization for Coding Agents

WebsiteYC profile

Why it ranks

How the rank works
7signal of 100 · rising 3
  • 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

AIEpsilabShared: long horizon, reinforcement learning, agentYC F26San FranciscoStartup →AIReplicasShared: agent harness, coding agent, taskYC X26San FranciscoStartup →AIMangoDeskShared: long horizonYC S25San FranciscoStartup →AIAviroShared: long horizon, reinforcement learning, datasetYC X25San FranciscoStartup →AIInactiveMentlioShared: context optimization, prompt, codingYC S26San FranciscoStartup →OtherRWXShared: coding agentStartup →
Companies closest to Synth
Company
EpsilabShared: long horizon, reinforcement learning, agentYC F26ActiveAI, Data
ReplicasShared: agent harness, coding agent, taskYC X26ActiveAI, Devtools
MangoDeskShared: long horizonYC S25ActiveAI
AviroShared: long horizon, reinforcement learning, datasetYC X25ActiveAI
MentlioShared: context optimization, prompt, codingYC S26InactiveAI, Devtools
RWXnot in a program hereShared: coding agentElsewhereOther

Adjacent

AIOpenCodeShared: coding agent, infrastructureYC W21TorontoStartup →AIAcquiredContinueShared: coding agentYC S23San FranciscoStartup →AIWebhoundShared: long horizon, dataset, agentYC S23San FranciscoStartup →AIJcodeShared: agent harness, coding agent, performanceYC S26San FranciscoStartup →AIPolymathShared: long horizon, agentYC W26San FranciscoStartup →
Companies next to Synth
Company
OpenCodeShared: coding agent, infrastructureYC W21ActiveAI, Devtools
ContinueShared: coding agentYC S23AcquiredAI, Devtools
WebhoundShared: long horizon, dataset, agentYC S23ActiveAI, Data
JcodeShared: agent harness, coding agent, performanceYC S26ActiveAI, Devtools
PolymathShared: long horizon, agentYC W26ActiveAI

Also from F24 in AI

All of F24
AIAbundantAgent simulation and RL for researchersYC F24San FranciscoStartup →AIAfternoon.coBookkeeping, compliance and tax for foundersYC F24New York CityStartup →AIArchilThe high-performance file system that connects AI to dataYC F24San FranciscoStartup →AIArchiLabsAI Data Center DesignYC F24San FranciscoStartup →AIAsha HealthWe help medical practices become AI-nativeYC F24New York CityStartup →AIattimetBuilding the Prime RadiantYC F24San FranciscoStartup →
Company
AbundantAgent simulation and RL for researchersteam of 7hiringActiveAI, Devtools
Afternoon.coBookkeeping, compliance and tax for foundersteam of 4ActiveAI
ArchilThe high-performance file system that connects AI to datateam of 11ActiveAI, Data, Devtools
ArchiLabsAI Data Center Designteam of 3hiringActiveAI
Asha HealthWe help medical practices become AI-nativeteam of 9hiringActiveAI
attimetBuilding the Prime Radiantteam of 3hiringActiveAI

Founders

  • Josh PurtellFounder/CEO

About Synth

Choose a coding agent harness, model, and task dataset and optimize context and prompts to get the best performance for long-horizon tasks

YC batch
F24 · Fall 2024
Status, per YC
Active
Category
AI, Developer tools
Team size
2
Location
San Francisco, CA, USA
Founded
2024
Checked
6h ago

YC tags: Reinforcement Learning, AI

Synth in F24: 94 companies, 86% AI

GitHub LinkedIn

Synth: questions

Which YC batch was Synth in?

Synth was in Y Combinator's Fall 2024 batch (F24).

Is Synth still active?

Y Combinator lists Synth as active.

Who founded Synth?

Synth's founders, as listed on its YC page: Josh Purtell (Founder/CEO).

Where is Synth based?

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