Upstream
YC S23Paris, FR · Founded 2023 · 7 employees · 4 known investors
Upstream is a team communication and collaboration platform designed to help professionals manage messages, tasks, and decision-making workflows across their organization.
Also known as Snik
Founders & leadership· Y Combinator alumni (S23)
Upstream was founded in 2023 by Louis Lecat and Jonathan Tiret.
LL
Louis Lecatin𝕏Co-founder & CEOLouis Lecat is a product leader who previously held Head of Product roles at Algolia and early product positions at Asana, where he contributed to growth at both companies. He also worked at AgilOne and holds degrees from Stanford and École des Ponts.
JT
Jonathan Tiretin𝕏Co-founder & CTOHe began developing software as a teenager on Dino Gaia, a French online game, and has held engineering leadership roles at companies in ride-hailing, fintech, and legaltech, most recently as VP of Engineering at Doctrine prior to its acquisition.
Investors · 4
Funding
SEC filings, press & company announcements$3M disclosed across 1 of 2 rounds · 2026
- $3MPre-seedJun 2026 · 3 sources
Y Combinator (lead), Connect Ventures, Roosh Ventures
Source ↗
Source: company announcements and press reports — follow each round's link for the claim.
In the news
Frequently asked questions
- What does Upstream do?
- Upstream is a team communication and collaboration platform designed to help professionals manage messages, tasks, and decision-making workflows across their organization.
- Who founded Upstream?
- Upstream was founded by Louis Lecat, Jonathan Tiret in 2023.
- Who are Upstream's investors?
- Upstream's investors include Roosh Ventures, Y Combinator, Connect Ventures, Connect Ventures.
- How much funding has Upstream raised?
- Upstream has disclosed $3M raised across 1 of its 2 known rounds.
- Where is Upstream headquartered?
- Upstream is headquartered in Paris, FR.