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14,448 startups · 29 programs

SigmaOS

Active · The new home for your internet 🏡

WebsiteYC profile

Why it ranks

How the rank works
10signal of 100 · rising 2
  • team of 5Team size · YC's directory+4
  • went through YCProgram · this site+4
  • hiringHiring · Titles (titles.fru.dev), YC+2

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

Competitors

OtherFlow ClubShared: productive work, productivity, designedYC S21San FranciscoStartup →
Companies closest to SigmaOS
Company
Flow ClubShared: productive work, productivity, designedYC S21ActiveOther

Adjacent

OtherClipflowShared: content creatorAntler 2025AustraliaStartup →AIViableShared: web appsAntler 2026SingaporeStartup →AIBeaconsShared: content creatorYC S19San FranciscoStartup →Developer toolsInactiveClayShared: collaboration, productivity, workingYC W21RemoteStartup →AILinkGrepShared: collaboration, productivity, browserYC W23JacksonvilleStartup →
Companies next to SigmaOS
Company
ClipflowShared: content creatorAntler 2025Not statedOther
ViableShared: web appsAntler 2026Not statedAI
BeaconsShared: content creatorYC S19ActiveAI
ClayShared: collaboration, productivity, workingYC W21InactiveDevtools
LinkGrepShared: collaboration, productivity, browserYC W23ActiveAI

Also from S21

All of S21
AIDailybotMake all team work visible, people and AI agentsYC S21RemoteStartup →AIInactiveForage MailAI that solves email overwhelm. Not another mail app.YC S21New York CityStartup →AIJestorSaving OPS from SLOPS. Jestor builds internal systems that last.YC S21San FranciscoStartup →AIStardexAI native ATS + CRM for executive search firmsYC S21New York CityStartup →AIWarpBuildAccelerate software development with WarpBuild's 10x faster CI infra.YC S21San FranciscoStartup →Developer toolsInactiveAbbotYour Customer Success Co-PilotYC S21San FranciscoStartup →
Company
DailybotMake all team work visible, people and AI agentsteam of 11ActiveAI, Devtools
Forage MailAI that solves email overwhelm. Not another mail app.team of 4InactiveAI
JestorSaving OPS from SLOPS. Jestor builds internal systems that last.team of 12ActiveAI
StardexAI native ATS + CRM for executive search firmsteam of 9hiringActiveAI
WarpBuildAccelerate software development with WarpBuild's 10x faster CI infra.team of 14ActiveAI, Devtools
AbbotYour Customer Success Co-Pilotteam of 5InactiveDevtools

About SigmaOS

SigmaOS is a new type of browser designed for founders, researchers, and content creators to make you better and faster at working on the web. You work 7+ hours a day on the web. Buried in a sea of 100+ tabs and 10+ web-apps 🤯, you constantly lose context for why you did what you did, and are always one click away from being distracted. We took apart the browser for you, and rebuilt a new experience from the ground-up, for the FASTEST and most PRODUCTIVE work. ⚡

YC batch
S21 · Summer 2021
Status, per YC
Active
Category
Other
Team size
5
Location
San Francisco, CA, USA; London, England, United Kingdom
Checked
6h ago

YC tags: SaaS, Productivity, Collaboration

SigmaOS in S21: 391 companies, 34% AI

SigmaOS: questions

Which YC batch was SigmaOS in?

SigmaOS was in Y Combinator's Summer 2021 batch (S21).

Is SigmaOS still active?

Y Combinator lists SigmaOS as active.

Where is SigmaOS based?

SigmaOS lists San Francisco, CA, USA; London, England, United Kingdom as its location on YC's directory.