Who invested in Customer.io?
Customer.io's investors include BoxGroup, Techstars, Kima Ventures, FJ Labs and Fabrice Grinda, and 4 more on record.

United States · Venture startup
Funding summaryUpdated 26 Oct 2026
$400Kraised across 5 rounds since 2012, from 5 sources
Each circle is a round, placed by date and sized by amount. The line above is the running total.
Customer.io filed one raise, $4.9M in all. Filings say how much was sold and to how many investors; they never name the investors.
From Customer.io's own website: 1 founder, 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.
Customer.io's investors include BoxGroup, Techstars, Kima Ventures, FJ Labs and Fabrice Grinda, and 4 more on record.
Customer.io has raised $400K across 5 rounds since 2012. 3 rounds did not disclose an amount, so the total is a floor.
Customer.io's most recent round was a Venture in Mar 2022.
Customer.io's largest round on record is $250K (Undisclosed round), in May 2012.
Customer.io's first round on record, in May 2012, was backed by BoxGroup and David Cohen.
Customer.io's latest named round is a Venture, in Mar 2022.
Customer.io is based in the United States.
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