United States · Funded startup
8 rounds we have observed, with the 36 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 1 month ago
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Funding summaryUpdated 5 Nov 2026
$207Mraised across 8 rounds since 2013, from 10 sources
Each circle is a round, placed by date and sized by amount. The line above is the running total.
International PaperLead
G2 Venture Partners
Thayer Investment Partners
Harmonic Growth Partners
Cerity Partners Ventures
Wind River VenturesReported by Firms' own news pages and 1 otherSEC filing: $36M sold
Reported by VentureburnSEC filing: $42M sold
Alexandria Real Estate Equities
Casdin Capital
Third Rock Ventures
EcoR1 Capital
Section 32Reported by FinSMEs
The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.
General CatalystL
Union Square VenturesL
ArchetypeL
PluralLInternational PaperL
Andreessen Horowitz
Khosla Ventures
BoxGroup
Bain Capital Ventures
DCVCMissing a round, or an investor who was in one? Tell us.
These 6 firms list Relay 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.
Relay's investors include General Catalyst, Union Square Ventures, Archetype, Plural and International Paper, and 31 more on record. International Paper led its latest round.
Relay has raised $207M across 8 rounds since 2013.
Relay's most recent round was an Undisclosed round of $36M in Oct 2026, led by International Paper.
Relay's largest round on record is $63M (Series B), in Dec 2017.
Relay's first round on record, in Feb 2013, was backed by Social Capital, The Social+Capital Partnership and Valar Ventures and 3 others.
Relay's latest named round is an Undisclosed round, in Oct 2026.
Relay is based in the United States.
Plural led the Series A in 2025; Union Square Ventures led the Series B in 2026; General Catalyst led the Growth in 2026; International Paper led the Undisclosed round in 2026.
In the same sector, and raised in the last eighteen months.
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United States · 
