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Startups14,448Programs29

14,448 startups · 29 programs

OpenPipe

Acquired · Turn expensive prompts into cheap fine-tuned models

WebsiteYC profile

Why it ranks

How the rank works
13signal of 100 · rising 4
  • acquired by CoreWeaveOutcome · YC, program pages, Acquisitions+4
  • went through YCProgram · this site+4
  • team of 2Team size · YC's directory+2.5
  • on 2 Glyph sourcesSeen across Glyph · the registry (companies.fru.dev)+2

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

Competitors

AIInactiveAirtrain AIShared: fine tuned, fine tuning, aiopsYC S22San FranciscoStartup →AIMachina SportsShared: fine tunedAntler 2024USStartup →AIUnsloth AIShared: fine tuning, custom model, accurateYC S24San FranciscoStartup →AIAutomorphicShared: fine tuning, custom model, aiopsYC S23San FranciscoStartup →AITrainLoopShared: fine tuningYC W25San FranciscoStartup →OtherTogether AIShared: fine tuning, modelStartup →
Companies closest to OpenPipe
Company
Airtrain AIShared: fine tuned, fine tuning, aiopsYC S22InactiveAI, Devtools
Machina SportsShared: fine tunedAntler 2024Not statedAI
Unsloth AIShared: fine tuning, custom model, accurateYC S24ActiveAI, Devtools
AutomorphicShared: fine tuning, custom model, aiopsYC S23ActiveAI, Devtools
TrainLoopShared: fine tuningYC W25ActiveAI, Devtools
Together AInot in a program hereShared: fine tuning, modelElsewhereOther

Adjacent

AITagflow AIShared: fine tuningAntler 2024IndonesiaStartup →AIJavelinShared: fine tuned, model, customPlug and PlayUnited StatesStartup →AIRoboflowShared: fine tuned, modelYC S20San FranciscoStartup →AITraverseShared: custom modelYC W26San FranciscoStartup →AIMoving AtomsShared: fine tuned, expensive, modelYC S26San FranciscoStartup →
Companies next to OpenPipe
Company
Tagflow AIShared: fine tuningAntler 2024Not statedAI
JavelinShared: fine tuned, model, customPlug and Play Not statedAI
RoboflowShared: fine tuned, modelYC S20ActiveAI, Devtools
TraverseShared: custom modelYC W26ActiveAI
Moving AtomsShared: fine tuned, expensive, modelYC S26ActiveAI, Data

Also from S23 in AI

All of S23
AIInactiveAtlaThe improvement engine for AI agentsYC S23LondonStartup →AIBaserunObservability and evaluation platform for LLM apps.YC S23San FranciscoStartup →AIAcquiredChatterDead simple LLM testing and iterationYC S23PhiladelphiaStartup →AICognitio LabsAI back office for food product quality teamsYC S23Los AngelesStartup →AIAcquiredFlowiseAIOpen source GenAI development platformYC S23RemoteStartup →AIHarnessRouterThe world's first unified interface for agent harnesses.YC S23San FranciscoStartup →
Company
AtlaThe improvement engine for AI agentsteam of 10InactiveAI, Data, Devtools
BaserunObservability and evaluation platform for LLM apps.team of 2ActiveAI, Devtools
ChatterDead simple LLM testing and iterationacquiredteam of 2AcquiredAI, Devtools
Cognitio LabsAI back office for food product quality teamsteam of 3ActiveAI, Data
FlowiseAIOpen source GenAI development platform55.5k starsteam of 5AcquiredAI, Devtools
HarnessRouterThe world's first unified interface for agent harnesses.team of 3ActiveAI, Devtools

About OpenPipe

OpenPipe is an SDK that abstracts away fine-tuning custom models. We capture your existing provider’s prompt-completion pairs in the background and use them to create a new model that is faster, cheaper and often more accurate than the original.

YC batch
S23 · Summer 2023
Status, per YC
Acquired
Category
AI, Developer tools
Team size
2
Location
Seattle, WA, USA
Checked
6h ago

YC tags: AIOps, Open Source, AI

Changes seen

TagsOct 19, 2026

Newly tagged AI; no longer tagged Artificial Intelligence.

Source ↗

OpenPipe in S23: 220 companies, 78% AI

Company profileAcquisitionsPaydayssocialsstandards

OpenPipe: questions

Which YC batch was OpenPipe in?

OpenPipe was in Y Combinator's Summer 2023 batch (S23).

Is OpenPipe still active?

Y Combinator lists OpenPipe as acquired.

Where is OpenPipe based?

OpenPipe lists Seattle, WA, USA as its location on YC's directory.