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Startups14,448Programs29

14,448 startups · 29 programs

Compose.ai

Active · Cut your writing time by 40% with AI-powered autocomplete

WebsiteYC profile

Why it ranks

How the rank works
11signal of 100 · rising 2
  • team of 7Team size · YC's directory+4.7
  • 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

Developer toolsSmartcutsShared: chrome extension, automate, workYC W21New York CityStartup →AIInactiveSidenoteShared: chrome extension, email, productivityYC S23San FranciscoStartup →OtherAcquiredRapportiveShared: email, free, productivityYC S10San FranciscoStartup →AIAcquiredOmniShared: chrome extension, productivityYC S20San FranciscoStartup →AIInactivePoint APIShared: chrome extension, email, productivityYC W18New York CityStartup →
Companies closest to Compose.ai
Company
SmartcutsShared: chrome extension, automate, workYC W21ActiveDevtools
SidenoteShared: chrome extension, email, productivityYC S23InactiveAI
RapportiveShared: email, free, productivityYC S10 +1AcquiredOther
OmniShared: chrome extension, productivityYC S20AcquiredAI
Point APIShared: chrome extension, email, productivityYC W18InactiveAI

Adjacent

OtherInactivePost.fmShared: email, productivityYC S10LondonStartup →OtherAcquiredreMailShared: email, productivityYC W09CAStartup →AISlashyShared: email, gmail, workYC S25San FranciscoStartup →OtherLoopsShared: emailYC W22WashingtonStartup →AIMailTimeShared: email, productivityYC W16Hong KongStartup →
Companies next to Compose.ai
Company
Post.fmShared: email, productivityYC S10InactiveOther
reMailShared: email, productivityYC W09AcquiredOther
SlashyShared: email, gmail, workYC S25ActiveAI
LoopsShared: emailYC W22ActiveOther
MailTimeShared: email, productivityYC W16ActiveAI

Also from W21 in AI

All of W21
AIAcquiredHyperGlueBusiness intelligence on textYC W21San FranciscoStartup →AIAbacumThe AI-native FP&A platform that helps Finance teams drive business…YC W21New York CityStartup →AIAlineaAutomated investing for the next generation 💸YC W21New York CityStartup →AIAnimaThe next generation care enablement platformYC W21LondonStartup →AIarnataAI workers for the logistics industry.YC W21San FranciscoStartup →AIAtomic IndustriesSoftware orchestrated mass production of plasticsYC W21ClevelandStartup →
Company
HyperGlueBusiness intelligence on textteam of 5acquiredAcquiredAI, Data
AbacumThe AI-native FP&A platform that helps Finance teams drive business…team of 125hiringActiveAI
AlineaAutomated investing for the next generation 💸team of 12hiringActiveAI
AnimaThe next generation care enablement platformteam of 20hiringActiveAI
arnataAI workers for the logistics industry.team of 15hiringActiveAI
Atomic IndustriesSoftware orchestrated mass production of plasticsteam of 60hiringActiveAI

About Compose.ai

Compose AI is a free Chrome extension that helps automate your writing using AI. You know how Gmail autocompletes your emails? Compose.ai is like that but everywhere, like how Grammarly works.

YC batch
W21 · Winter 2021
Status, per YC
Active
Category
AI
Team size
7
Location
Carlsbad, CA, USA; San Francisco, CA, USA; Remote
Checked
13h ago

YC tags: NLP, Email, AI

Changes seen

TagsOct 19, 2026

Newly tagged AI; no longer tagged Artificial Intelligence.

Source ↗

Compose.ai in W21: 336 companies, 30% AI

Compose.ai: questions

Which YC batch was Compose.ai in?

Compose.ai was in Y Combinator's Winter 2021 batch (W21).

Is Compose.ai still active?

Y Combinator lists Compose.ai as active.

Where is Compose.ai based?

Compose.ai lists Carlsbad, CA, USA; San Francisco, CA, USA; Remote as its location on YC's directory.