France · 
Who invested in Upstream?
Upstream's investors include Y Combinator, Kima Ventures and Connect Ventures.
202420252026
$500KPre-seed$500KPre-seedFrance · Pre-seed startup
Who invested in Upstream
2 rounds we have observed, with the 3 investors named in them. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it.
Raised 5 months ago
Funding summaryUpdated 26 Oct 2026
$1.0Mraised across 2 rounds since 2023, from 2 sources
$500KPre-seed$500KPre-seed
- Latest round
- Pre-seed, $500KJun 2026
- Investors
- 3
The funding story
Each circle is a round, placed by date and sized by amount. The line above is the running total.
- First round
- Pre-seed, $500K Aug 2023
- Biggest round
- $500K Pre-seed · Jun 2026
- Between rounds
- 2.8 years from the last two
UpstreamCybersecurity1 / 13Their pitch deckUpstream's pitch deck, 13 slidesEach slide read for what it argues, against the decks that raised at the same stage.→The rounds
- Jun 2026
- Aug 2023
Who was in which round
The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.
Everyone who backed them
Missing a round, or an investor who was in one? Tell us.
Quick answers about Upstream
How much has Upstream raised?
Upstream has raised $1.0M across 2 rounds since 2023.
When did Upstream last raise?
Upstream's most recent round was a Pre-seed of $500K in Jun 2026.
What was Upstream's biggest round?
Its most recent round, $500K in Jun 2026, is also its largest on record.
Who backed Upstream first?
Upstream's first round on record, in Aug 2023, was backed by Y Combinator.
What stage is Upstream at?
Upstream's latest named round is a Pre-seed, in Jun 2026.
Where is Upstream based?
Upstream is based in France.
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