United States · Funded startup

Who invested in Semafor

One round we have observed, with the 0 investors named in it. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it.

Media

Raised 10 months ago

Funding summaryUpdated 26 Oct 2026

$64Mraised across 1 round since 2025, from 1 source

Latest round
Round, $64MDec 2025
Investors
0
See who backed them

The rounds

  1. Dec 2025
    Round$64M

    No investor was named in the report.

    Filed with the SEC (Form D); no report of this raise yetSEC filing: $64M sold, first sale Dec 2025

Also claim to have backed them

This firm lists Semafor as a portfolio company on their own website, but no report of a round names it. They are the firms' own claims, kept apart from the rounds above.

SustainX VenturesAdvisorPer its own site

Quick answers about Semafor

How much has Semafor raised?

Semafor has raised $64M across 1 round since 2025.

When did Semafor last raise?

Semafor's most recent round, $64M, was in Dec 2025.

What was Semafor's biggest round?

Its most recent round, $64M in Dec 2025, is also its largest on record.

Where is Semafor based?

Semafor is based in the United States.

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