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Startups14,448Programs29

14,448 startups · 29 programs

Stamp

Active · The AI Secretary for Email and Calendar.

WebsiteYC profile

Why it ranks

How the rank works
4signal of 100 · rising 2
  • went through YCProgram · this site+4

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

Competitors

AISlashyShared: email client, inbox, calendarYC S25San FranciscoStartup →OtherInactivePost.fmShared: inbox, email, productivityYC S10LondonStartup →AIUpstreamShared: inbox, noise, doingYC S23ParisStartup →AIScapeShared: inbox, email, productivityYC S24StockholmStartup →AIMailTimeShared: email client, productivityYC W16Hong KongStartup →
Companies closest to Stamp
Company
SlashyShared: email client, inbox, calendarYC S25ActiveAI
Post.fmShared: inbox, email, productivityYC S10InactiveOther
UpstreamShared: inbox, noise, doingYC S23ActiveAI
ScapeShared: inbox, email, productivityYC S24ActiveAI, Devtools
MailTimeShared: email client, productivityYC W16ActiveAI

Adjacent

AIABIVOShared: email clientAntler 2025CanadaStartup →OtherInactiveGliderShared: inbox, email, filterYC W12PortlandStartup →AIAkiflowShared: calendar, task, productivityYC S20CTStartup →AIFollowUpThenShared: email client, second, productivityYC S17San FranciscoStartup →AIAcquiredSpeckShared: action item, task, automateYC W24San FranciscoStartup →
Companies next to Stamp
Company
ABIVOShared: email clientAntler 2025Not statedAI
GliderShared: inbox, email, filterYC W12InactiveOther
AkiflowShared: calendar, task, productivityYC S20ActiveAI
FollowUpThenShared: email client, second, productivityYC S17ActiveAI
SpeckShared: action item, task, automateYC W24AcquiredAI

Also from W25 in AI

All of W25
AI.WaveInference for real-time AIYC W25ParisStartup →AI10xAI Sales Teams for Dental PracticesYC W25San FranciscoStartup →AIa0.devWe make mobile apps using AI.YC W25San FranciscoStartup →AIA1Zap by A1BaseThe social network layer for AI appsYC W25San FranciscoStartup →AIAdamAI Powered CADYC W25San FranciscoStartup →AIAfterQueryApplied research lab curating data solutions for foundation model…YC W25San FranciscoStartup →
Company
.WaveInference for real-time AIteam of 2ActiveAI, Devtools
10xAI Sales Teams for Dental Practicesteam of 3hiringActiveAI, Data
a0.devWe make mobile apps using AI.team of 3hiringActiveAI, Devtools
A1Zap by A1BaseThe social network layer for AI appsteam of 2ActiveAI, Devtools
AdamAI Powered CADteam of 4hiringActiveAI, Devtools
AfterQueryApplied research lab curating data solutions for foundation model…team of 30hiringActiveAI, Data, Devtools

Founders

  • Archit MehtaFounder/CEO

About Stamp

Stamp is the first AI Native inbox. It's more than an email client, though -- it's like your second brain. Stamp can respond to emails in your voice, organize your inbox to filter out the noise, keep track of action items, and automate essentially every task you're doing manually in your inbox today.

YC batch
W25 · Winter 2025
Status, per YC
Active
Category
AI
Team size
1
Location
San Francisco, CA, USA
Founded
2024
Checked
7h ago

Stamp in W25: 166 companies, 84% AI

LinkedIn

Stamp: questions

Which YC batch was Stamp in?

Stamp was in Y Combinator's Winter 2025 batch (W25).

Is Stamp still active?

Y Combinator lists Stamp as active.

Who founded Stamp?

Stamp's founders, as listed on its YC page: Archit Mehta (Founder/CEO).

Where is Stamp based?

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