Upstream YC Application

Summer 2023Active

Upstream went through Y Combinator in the Summer 2023 batch as a B2B company. Below: what the company does, who founded it, and its application to YC, reconstructed question by question in the real YC form.

YC batch: Summer 2023
Industry: B2BProductivity
Team size: 7
Status: Active
Launched: 2023

Founders

Louis LecatFounder
Jonathan TiretFounder

What Upstream does

Your inbox, handled for you. Upstream's agents sort the noise, draft replies in your exact voice, follow up at the right time, and do what you ask - like finding receipts or scheduling meetings - so you can fly through your inbox and have fun doing it.

Upstream's YC application, reconstructed

Y Combinator application

Upstream, Summer 2023 batch. The real form questions, answered from public data.

Founders2
Company7
Progress7
Idea4
Equity3
Curious2
Batch Preference1

Company

Company name

Upstream

Describe what your company does in 50 characters or less.

The first inbox designed for humans and agents

What is your company going to make? Please describe your product and what it does or will do.

We built an inbox where our AI agents sort through your emails, draft replies matching your voice, follow up at the right time, and carry out tasks like finding receipts or scheduling meetings. Instead of scrolling endlessly, users get their inbox handled for them so they can focus on work that matters.

Where do you live now, and where would the company be based after YC?

We do not currently specify our location publicly and are flexible about the company's base after YC.

Explain your decision regarding location.

Since our team is distributed or location-agnostic, we prioritize being where YC supports us without relocation friction.

21 more answers in the full application

Founders, Progress, Idea, Equity, Curious, Batch Preference are in the full version. Create a free account to open it in YC Insights, next to every other YC batch.

See full application

Frequently Asked Questions

Is this the real Upstream YC application?

No. Y Combinator keeps submitted applications private. This is a reconstruction: the real YC form questions, answered from Upstream's public data (launch notes, founder backgrounds, product description). It shows how a company like Upstream would present itself to YC, not the text they submitted.