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me, Jonathan

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Joseph and I just chatted and decided we should go with the first one...

GA

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Me, Patryk, Louis

Coffee Machines

Joseph and I just chatted and decided we should go with the first one...

1 hour ago

GA

GA

Romaine, Re...Jon

Upstream + Anthropic - YC Credits

Hi Jon, Thanks for reaching out to…

1 hour ago

GA

GA

Arthur, Louis

Feedback Beta tester

Hello Louis, avec plaisir. Je suis dispo vendredi à 18h CET. Let me know, Arthur

4:50 PM

GA

me, Joseph, Patryk

channels rules launch?

Nice! I agree. I’m merging another small update this morning (delete…

1 hour ago

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me, Jonathan

Does the Snooze mention go away after some time?

Joseph and I just chatted and decided we should go with the first one...

GA

GA

GA

Me, Patryk, Louis

Coffee Machines

Joseph and I just chatted and decided we should go with the first one...

1 hour ago

GA

GA

Romaine, Re...Jon

Upstream + Anthropic - YC Credits

Hi Jon, Thanks for reaching out to…

1 hour ago

GA

GA

Arthur, Louis

Feedback Beta tester

Hello Louis, avec plaisir. Je suis dispo vendredi à 18h CET. Let me know, Arthur

4:50 PM

GA

me, Joseph, Patryk

channels rules launch?

Nice! I agree. I’m merging another small update this morning (delete…

1 hour ago

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me, Jonathan

Does the Snooze mention go away after some time?

Joseph and I just chatted and decided we should go with the first one...

GA

GA

GA

Me, Patryk, Louis

Coffee Machines

Joseph and I just chatted and decided we should go with the first one...

1 hour ago

GA

GA

Romaine, Re...Jon

Upstream + Anthropic - YC Credits

Hi Jon, Thanks for reaching out to…

1 hour ago

GA

GA

Arthur, Louis

Feedback Beta tester

Hello Louis, avec plaisir. Je suis dispo vendredi à 18h CET. Let me know, Arthur

4:50 PM

GA

me, Joseph, Patryk

channels rules launch?

Nice! I agree. I’m merging another small update this morning (delete…

1 hour ago

Backed by

Combinator

The first inbox designed for humans and agents

Upstream organizes your inbox, cuts the noise, drafts replies and follow-ups in your voice so you feel lighter and focused

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Used by thousands of professionals and teams at:

the inbox that

the inbox that

handles itself

handles itself

Focus

on what

on what matters most

matters most

Upstream splits your inbox into what needs attention, what can wait, and what you can ignore so important emails never get buried

  • Messages that need a reply are pre-sorted when you open your inbox

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Linear

Noise

GA

GA

me, Jonathan

Quick decisions to unblock today

A few threads need your eyes this morning — nothing huge, but worth clearing before the day gets away from you.

GA

Janice, Arthur

Can you take a look?

This is mostly ready — just need your take before we finalize it.

5 mins ago

GA

GA

Paul, Charlize

Investor Follow-up

For next week’s review, could you: Add a brief summary slide with your recommendation, and

1 hour ago

GA

Duane

Linear x GitHub integration

Jon mentioned you on a task

4 hours ago

GA

GA

GA

Patryk

An idea for your team

Saw what you’re building and thought this might be relevant if this is a priority right now.

12:38 PM

GA

Noëline

Initial contact x Noëline

In case it's useful to see some ROI from our existing customers:

6:50 AM

Focus

on what

matters most

Upstream splits your inbox into what needs attention, what can wait, and what you can ignore so important emails never get buried

  • Messages that need a reply are pre-sorted when you open your inbox

  • Your inbox is organized into Splits that fit your workflow

  • AI moves cold emails and newsletters out of the way

Primary

5

Needs Reply

VIP

Linear

Noise

GA

GA

me, Jonathan

Quick decisions to unblock today

A few threads need your eyes this morning — nothing huge, but worth clearing before the day gets away from you.

GA

Janice, Arthur

Can you take a look?

This is mostly ready — just need your take before we finalize it.

5 mins ago

GA

GA

Paul, Charlize

Investor Follow-up

For next week’s review, could you: Add a brief summary slide with your recommendation, and

1 hour ago

GA

Duane

Linear x GitHub integration

Jon mentioned you on a task

4 hours ago

GA

GA

GA

Patryk

An idea for your team

Saw what you’re building and thought this might be relevant if this is a priority right now.

12:38 PM

GA

Noëline

Initial contact x Noëline

In case it's useful to see some ROI from our existing customers:

6:50 AM

Drafts

that

that sound like you

sound like you, just hit send

you, just hit send

Upstream drafts replies in your voice, tailored to each specific conversation

  • Upstream identifies your writing patterns and saves them as a personalized prompt

  • Agentic AI drafts replies, taking into account recipients, thread context, and past messages with recipients

  • AI drafts are already there when you open a message, just tweak and hit send

Deck for Monday

GA

GA

GA

Hugo Pani

·

Yesterday at 2:09 PM

did you get a chance to look at the updated deck yet? lmk what you think

GA

Louis Lecat

·

Today at 1:16 PM

Yeah, I went through it this morning. It looks good overall,
what do you think about making slide 6 a little clearer?

AI Draft

that sgtm, I’ll clean that one up today and send the revised version once it’s updated




AI

Drafts

that sound like

sound like you, just hit send

you, just hit send

Upstream drafts replies in your voice, tailored to each specific conversation

  • Upstream identifies your writing patterns and saves them as a personalized prompt

  • Agentic AI drafts replies, taking into account recipients, thread context, and past messages with recipients

  • AI drafts are already there when you open a message, just tweak and hit send

Deck for Monday

GA

GA

GA

Hugo Pani

·

Yesterday at 2:09 PM

did you get a chance to look at the updated deck yet? lmk what you think

GA

Louis Lecat

·

Today at 1:16 PM

Yeah, I went through it this morning. It looks good overall,
what do you think about making slide 6 a little clearer?

AI Draft

that sgtm, I’ll clean that one up today and send the revised version once it’s updated




AI

Follow up

Follow up

at

at the right time

at the right time

the right time

Upstream brings important conversations back at the right time with an AI draft, so nothing slips through the cracks

Upstream brings important conversations back at the right time with an AI draft, so nothing slips through the cracks

  • Upstream assesses the context of each message to determine the exact time a follow up should return to your inbox

  • Upstream assesses the context of each message to determine the exact time a follow up should return to your inbox

  • AI generates a draft taking into account any other threads with the recipients

  • AI generates a draft taking into account any other threads with the recipients

Follow ups

GA

me, Lisa

Recap from earlier

Sharing a quick summary in case helpful as you look this over.

GA

GA

me, Jonathan

Checking in on this issue

Wanted to see whether you’d had any movement on this since my last note.

12 mins ago

GA

GA

Romaine, Jon

Great meeting you at the Tech Summit

It was great meeting you there, so I wanted to reach back out here.

2 hous ago

GA

Joseph, Patryk

Sharing the file here

Sending this over again here in case it is easier to reference.

4:50 PM

GA

GA

GA

me, Patryk, Louis

Had a chance to review?

Curious whether you’ve had a moment to take a look yet.

2:37 PM

GA

GA

Arthur, Louis

Glad we had a chance to connect

Reaching out again since I enjoyed our conversation and wanted to stay in touch.

1:19 PM

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Design Review

GA

GA

Granola

·

1:30 PM

AI Draft

Launch Follow-Up: Site, Messaging & Assets

Thanks again, this was a helpful website review. Here are the follow-ups:


• Tighten the website structure and messaging

• Improve the visual treatment across key sections

• Rework homepage structure and supporting copy


Janet

AI

Design Review

GA

GA

Granola

·

1:30 PM

AI Draft

Launch Follow-Up: Site, Messaging & Assets

Thanks again, this was a helpful website review. Here are the follow-ups:


• Tighten the website structure and messaging

• Improve the visual treatment across sections

• Rework homepage structure and copy


Janet

AI

Bring your own context

Bring your own context

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How it works

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Write better emails, faster

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Quickly connect to Gmail

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Upstream AI finds your voice & tone

AI learns your style, audiences, patterns, and individual preferences

3

Fly through email with confidence

Go to your inbox and see your emails organized with pre-drafted replies

Everything you need for
email, reimagined

Everything you need for email, reimagined

Everything you need for
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Stay on top of every message with speed, clarity, and AI that actually helps.

Ever feel like your inbox is working against you? Stay on top of every message with speed, clarity, and AI that actually helps.

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Have private discussions, right inside threads

Introduction to NACO Ventures

GA

GA

Comments

GA

GA

GA

John Ross

·

Yesterday at 3:16 PM

@Duane do you think we should chat with this investor from NACO?

Chat privately - comment or @ others

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me, Jonathan

Does the Snooze mention go away after some time?

Joseph and I just chatted and decided we should go with the first one...

GA

GA

GA

Me, Patryk, Louis

Coffee Machines

Joseph and I just chatted and decided we should go with the first one...

1 hour ago

GA

GA

Romaine, Re...Jon

Upstream + Anthropic - YC Credits

Hi Jon, Thanks for reaching out to…

1 hour ago

GA

GA

Arthur, Louis

Feedback Beta tester

Hello Louis, avec plaisir. Je suis dispo vendredi à 18h CET. Let me know, Arthur

4:50 PM

GA

me, Joseph, Patryk

channels rules launch?

Nice! I agree. I’m merging another small update this morning (delete…

1 hour ago

AI Compose

Tell AI what you want to say and get a complete, ready-to-send email in seconds

Hey Hugo,

Thanks for reaching out, I’d be happy to meet. Let me know what day and times work best for you.

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Turn email into collaborative spaces for teams, projects, and priorities

GA

GA

GA

GA

me, Jonathan

More inspiration

Jonathan and I just chatted and decided we should go with the first one...

GA

GA

GA

Me, Paul, Louis

Office appliances

Paul and I just chatted and decided we should go with the first one...

1 hour ago

GA

GA

Romaine

Upstream Credits

Thanks for reaching out to…

1 hour ago

GA

GA

Arthur, Louis

Feedback Beta tester

Hello Louis, avec plaisir. Je suis dispo vendredi à 18h CET. Let me know, Arthur

4:50 PM

GA

Patrick

Channels rules

Nice! I agree. I’m merging another small update this morning (delete…

1 hour ago

Bulk Triage

Clear months of emails in minutes with powerful batch actions

me, Jonathan

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Qonto.com

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Bookface Forum Digest

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GA

Louis , Vincent

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Frequently Asked Questions

Frequently Asked Questions

Still have a question in mind? Contact us

Still have a question in mind?
Contact us

Does Upstream send emails automatically?

Which models does Upstream use?

Does Upstream work with Claude, ChatGPT and Cursor?

How does Upstream learn my writing style?

Does Upstream prepare drafts automatically?

Can Upstream follow up on emails for me?

Can I use Upstream with more than one email account?

Is my email data secure, and does Upstream train on my emails?

How is my data protected?

Does Upstream send emails automatically?

Which models does Upstream use?

Does Upstream work with Claude, ChatGPT and Cursor?

How does Upstream learn my writing style?

Does Upstream prepare drafts automatically?

Can Upstream follow up on emails for me?

Can I use Upstream with more than one email account?

Is my email data secure, and does Upstream train on my emails?

How is my data protected?

  • Honestly I used to dread my inbox. With Upstream everything's already sorted and half the replies are drafted, and now I actually enjoy doing email. Didn't think I'd ever say that.

    Jo Widawski

    Founder & CEO of Maze

  • What I love most about Upstream is the AI-powered drafts that sit right in my inbox, already written in my voice. It's been a huge time-saver, I can respond to emails so much faster without sacrificing quality or my personal touch.

    Antoine Sakho

    Product leader, ex-Pennylane

  • I love the shortcuts. It makes treating emails so much quicker and enjoyable. And I also love the design. It is thought through, finished unto the fine details and very clean and pleasant visually.

    Eugen Gossen

    Lirion

  • Upstream is the first email tool that actually reduced my workload instead of adding to it. The auto-drafts nail my tone, the triage is ruthless in the best way, and it handles my English/French context-switching without a single config change. It figured out how I work on its own — I never touched a setting. If you're building for superhumans, this is the infrastructure layer they've been missing.

    Kabir Sethi

    Bitstack

  • Inbox zero sounded like pure fiction until Upstream came along. I used to lose so much time every day and dread the time I'd have to spend sorting things out. But they just… get it. I went from dreading my email to looking forward to cleaning out my inbox!

    Cédric Blanchard

    Le French Product (podcast/creator)

  • Voice & Tone is Upstream's killer feature. It learns my style from past emails, so drafts come out sounding like me without prompting or pasting context. I get through my inbox much faster, without my replies sounding generated.

    Benjamin Lalanne

    Founder of Blynt AI

  • Upstream is one of the most useful tools we use daily. It's helped us save real time on information sharing across the team, reach inbox zero faster, and gain full visibility on what's happening in our inbox. Being able to chat directly over an email and automate most of our internal ops has been a game changer.

    Mariem Ould Ismail

    Co-founder of Stockline

  • Upstream streamlines my inbox routine. It structures emails, prioritizes them, drafts replies in my tone, and inserts my Calendly links where relevant. It makes responding 3–4x more efficient and helps me move conversations forward much faster.

    Adam Hashchyshyn

    Principal at Roosh VC

  • I was skeptical about AI email tools until I found Upstream. Upstream understands context and provides genuinely intelligent assistance. It catches nuances in conversations, drafts responses that sound just like meIt also categorises my conversations according to priorities. It has truly transformed how I manage my inbox.

    Shuvayu Das Gupta

    Co-Founder of Talos

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GA

GA

me, Jonathan

Does the Snooze mention go away after some time?

Joseph and I just chatted and decided we should go with the first one...

GA

GA

GA

Me, Patryk, Louis

Draft

Coffee Machines

Joseph and I just chatted and decided we should go with the first one...

1 hour ago

GA

GA

Romaine, Re...Jon

Follow Up

Upstream + Anthropic - YC Credits

Hi Jon, Thanks for reaching out to…

3 hours ago

GA

GA

Arthur, Louis

Feedback Beta tester

Hello Louis, avec plaisir. Je suis dispo vendredi à 18h CET. Let me know, Arthur

4:50 PM

GA

me, Joseph, Patryk

Draft

Channels rules launch

Nice! I agree. I’m merging another small update this morning (delete…

11:53 AM

© 2026 Upstream Labs, Inc. All Rights Reserved.

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Regain focus

Let Upstream handle your inbox so
you can focus on what matters most

Get Started for Free

Inbox

Needs Reply

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Starred

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1

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Other

GA

GA

me, Jonathan

Does the Snooze mention go away after some time?

Joseph and I just chatted and decided we should go with the first one...

GA

GA

GA

Me, Patryk, Louis

Draft

Coffee Machines

Joseph and I just chatted and decided we should go with the first one...

1 hour ago

GA

GA

Romaine, Re...Jon

Follow Up

Upstream + Anthropic - YC Credits

Hi Jon, Thanks for reaching out to…

3 hours ago

GA

GA

Arthur, Louis

Feedback Beta tester

Hello Louis, avec plaisir. Je suis dispo vendredi à 18h CET. Let me know, Arthur

4:50 PM

GA

me, Joseph, Patryk

Draft

Channels rules launch

Nice! I agree. I’m merging another small update this morning (delete…

11:53 AM

© 2026 Upstream Labs, Inc. All Rights Reserved.

Contact Us

Careers

Privacy Policy

Regain focus

Let Upstream handle your inbox so
you can focus on what matters most

Get Started for Free

Inbox

Needs Reply

Follow Ups

Starred

Snoozed

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Needs Reply

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GA

GA

me, Jonathan

Does the Snooze mention go away after some time?

Joseph and I just chatted and decided we should go with the first one...

GA

GA

GA

Me, Patryk, Louis

Draft

Coffee Machines

Joseph and I just chatted and decided we should go with the first one...

1 hour ago

GA

GA

Romaine, Re...Jon

Follow Up

Upstream + Anthropic - YC Credits

Hi Jon, Thanks for reaching out to…

3 hours ago

GA

GA

Arthur, Louis

Feedback Beta tester

Hello Louis, avec plaisir. Je suis dispo vendredi à 18h CET. Let me know, Arthur

4:50 PM

GA

me, Joseph, Patryk

Draft

Channels rules launch

Nice! I agree. I’m merging another small update this morning (delete…

11:53 AM

© 2026 Upstream Labs, Inc. All Rights Reserved.

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