Onlook

Active · The Developer tool for Designers

YC W25

Website YC profile

Why it ranks

How the rank works

10signal of 100 · rising 6

went through YCProgram · this site+4
team of 4Team size · YC's directory+3.6
hiringHiring · Titles (titles.fru.dev), YC+2

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

Competitors

TempoShared: visual editor, design tools, designerYC S23TorontoStartup →AI

MidrenderShared: visual editor, design, codeYC S23San FranciscoStartup →AI

DesignbaseShared: design, code, developmentYC W23RemoteStartup →AI

RivetShared: designYC F25San FranciscoStartup →AI

Browser UseShared: github star, open, sourceYC W25San FranciscoStartup →

Companies closest to Onlook
Company	Category	Status	Program
TempoShared: visual editor, design tools, designerYC S23ActiveAI, Devtools	AI, Devtools	Active	YCS23
MidrenderShared: visual editor, design, codeYC S23ActiveAI, Devtools	AI, Devtools	Active	YCS23
DesignbaseShared: design, code, developmentYC W23ActiveAI, Devtools	AI, Devtools	Active	YCW23
RivetShared: designYC F25ActiveAI, Devtools	AI, Devtools	Active	YCF25
Browser UseShared: github star, open, sourceYC W25ActiveAI, Devtools	AI, Devtools	Active	YCW25

Adjacent

RadiusShared: design, code, developerYC F25San FranciscoStartup →AIInactive

supercontrastShared: design, anyoneYC F24San FranciscoStartup →Developer toolsInactive

PixelapseShared: design, githubYC W12San FranciscoStartup →Developer toolsInactive

moonrepoShared: developer tool, code, openYC W23PortlandStartup →Data

HaystackShared: developer tool, githubYC W21San FranciscoStartup →

Companies next to Onlook
Company	Category	Status	Program
RadiusShared: design, code, developerYC F25ActiveAI, Devtools	AI, Devtools	Active	YCF25
supercontrastShared: design, anyoneYC F24InactiveAI, Devtools	AI, Devtools	Inactive	YCF24
PixelapseShared: design, githubYC W12InactiveDevtools	Devtools	Inactive	YCW12
moonrepoShared: developer tool, code, openYC W23InactiveDevtools	Devtools	Inactive	YCW23
HaystackShared: developer tool, githubYC W21 +1ActiveData, Devtools	Data, Devtools	Active	YC +1W21

Also from W25 in AI

All of W25

a0.devWe make mobile apps using AI.YC W25San FranciscoStartup →AI

AdamAI Powered CADYC W25San FranciscoStartup →AI

ArtilLet your agents message teammates and other agentsYC W25LondonStartup →AI

assistant-uiOpen Source React.js Library for AI ChatYC W25San FranciscoStartup →AI

CodevisorThe fastest native app for agentic engineering.YC W25San FranciscoStartup →AI

Confident AIProduction Monitoring & Evals for AI AgentsYC W25San FranciscoStartup →

Company	Category	Status
a0.devWe make mobile apps using AI.team of 3hiringActiveAI, Devtools	AI, Devtools	Active
AdamAI Powered CADteam of 4hiringActiveAI, Devtools	AI, Devtools	Active
ArtilLet your agents message teammates and other agentsteam of 2ActiveAI, Devtools	AI, Devtools	Active
assistant-uiOpen Source React.js Library for AI Chatteam of 3ActiveAI, Devtools	AI, Devtools	Active
CodevisorThe fastest native app for agentic engineering.team of 2ActiveAI, Devtools	AI, Devtools	Active
Confident AIProduction Monitoring & Evals for AI Agentsteam of 7hiringActiveAI, Devtools	AI, Devtools	Active

Founders

Daniel FarrellFounder/CEO

About Onlook

Onlook is the fastest way for anyone to craft exceptional experiences in code. We built an open-source, visual editor for code that merges design, development, and AI. Since launching, Onlook hit #1 on Hacker News, was the #1 trending repo on GitHub–twice– and has earned over 26,000 GitHub stars. Founded by Daniel Farrell, a designer of 10+ years and former Head of Growth, and Kiet Ho, an ex-Amazon and ex-ServiceNow engineer, Onlook is on a mission to finally solve the gap between design and development.

YC batch: W25 · Winter 2025
Status, per YC: Active
Category: AI, Developer tools
Team size: 4
Location: San Francisco, CA, USA
Founded: 2024
Checked: 13h ago

YC tags: Developer Tools, Design, Design Tools, AI