United States · Seed startup
3 rounds we have observed, with the 14 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 7 months ago
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Funding summaryUpdated 5 Nov 2026
$10Mraised across 3 rounds since 2019, from 4 sources
Each circle is a round, placed by date and sized by amount. The line above is the running total.
Slow VenturesLead
Collide CapitalLead
I2BF Global Ventures
Bienville Capital
Connexa CapitalReported by TechStartups and 1 other
Source recorded
From Prefix's own website: 6 on the team.
The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.
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These 4 firms list Prefix 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.
Prefix's investors include Brand Foundry Ventures, Slow Ventures, Chicago Ventures, Collide Capital and Techstars, and 9 more on record. Slow Ventures led its latest round.
Prefix has raised $10M across 3 rounds since 2019. One round did not disclose an amount, so the total is a floor.
Prefix's most recent round was a Seed of $7.5M in Apr 2026, led by Slow Ventures.
Its most recent round, $7.5M in Apr 2026, is also its largest on record.
Prefix's first round on record, in Oct 2019, was backed by Chicago Ventures, Brand Foundry Ventures and Brian Spaly.
Prefix's latest named round is a Seed, in Apr 2026.
Prefix is based in the United States.
Chicago Ventures led the Seed in 2019; Slow Ventures led the Seed in 2026.
In the same sector, and raised in the last eighteen months.
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United States · 
