Upstream
ActiveThe first inbox designed for humans and agents
About
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.
Founders
Louis Lecat· FounderI'm the founder & CEO @ Upstream. I was one of the early product people @ Asana, driving growth and adoption up to $100M ARR. I went on to lead the entire product team @ Algolia (YC W14) as their Head of Product through series B and C, assembling a team of 20+ talented product builders, while growing ARR 2.5x to $100M+. Also worked @ AgilOne (acquired) and graduated from @ Stanford and @ Ecole des Ponts
- Jonathan Tiret· Founder
I am the co-founder & CTO @ Upstream. My love for software started when I was only a teenager: I developed @ Dino Gaia, one of the most popular online French consumer games in the 2000s, registering a million visits every month. I've since built extensive technical hands-on and leadership experience across multiple sectors, including ride-hailing, fintech, and legaltech. I was most recently the VP of Engineering @ Doctrine before it got acquired.
Product launches · 2 launches
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Change history · 11 recorded
- July 5, 2026
- YC partner updated08:01 PM
- New launch posted: Upstream - The first inbox designed for humans and agents08:01 PM
- Founder profile updated08:01 PM
- June 21, 2026
- YC partner updated08:00 PM
- Founder profile updated08:00 PM
- Launches refreshed08:00 PM
- June 15, 2026
- Stopped hiring07:00 PM
- June 7, 2026
- YC partner updated08:00 PM
- Launches refreshed08:00 PM
- Founder profile updated08:00 PM
- June 2, 2026
- Description rewritten07:00 PM