The company has rebuilt email infrastructure from the ground up to support AI agents that can read, write, organise, and act on behalf of users, rather than layering assistants onto traditional email clients originally designed only for human interaction.
Upstream has raised €2.6M across 1 funding round from 4 investors, most recently a Pre-Seed round in Jun 2026. Based in Paris, France; active in AI. Data as of 7 Aug 2026.
Timing: too soon vs cohort gap · momentum unknown. Funding-only estimates, not predictions and not investment advice — see signals.
| Date | Stage | Amount | Investors | |
|---|---|---|---|---|
| 2026-06-03 | Pre-Seed | €2.6M |
| Angel Investors,Connect Ventures,Roosh Ventures ,Y Combinator |
| View deal → |
