United States · 
Who invested in Efference?
Efference's investors include Y Combinator and 500 Global.
United States · Pre-seed startup
Who invested in Efference
Funding summaryUpdated 26 Oct 2026
$500Kraised across 1 round since 2025, from 1 source
- Latest round
- Pre-seed, $500KNov 2025
- Investors
- 2
The rounds
- Nov 2025
Everyone who backed them
Missing a round, or an investor who was in one? Tell us.
Also claim to have backed them
These 2 firms list Efference as a portfolio company on their own websites, but no report of a round names them. They are the firms' own claims, kept apart from the rounds above.
Quick answers about Efference
How much has Efference raised?
Efference has raised $500K across 1 round since 2025.
When did Efference last raise?
Efference's most recent round was a Pre-seed of $500K in Nov 2025.
What was Efference's biggest round?
Its most recent round, $500K in Nov 2025, is also its largest on record.
Who backed Efference first?
Efference's first round on record, in Nov 2025, was backed by Y Combinator and 500 Global.
What stage is Efference at?
Efference's latest named round is a Pre-seed, in Nov 2025.
Where is Efference based?
Efference is based in the United States.
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