Who invested in Pioneer Square Labs?
Pioneer Square Labs's investors include Techstars, Menlo Ventures, Greycroft, Madrona Venture Group and ARCH Venture Partners, and 8 more on record.

United States · Series B startup
Funding summaryUpdated 26 Oct 2026
$28Mraised across 2 rounds since 2015, from 2 sources
Each circle is a round, placed by date and sized by amount. The line above is the running total.
Reported by FinSMEs
No investor was named in the report.
From a historical funding recordSEC filing: $9.5M sold, first sale Sept 2015
From Pioneer Square Labs'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.
Pioneer Square Labs's investors include Techstars, Menlo Ventures, Greycroft, Madrona Venture Group and ARCH Venture Partners, and 8 more on record.
Pioneer Square Labs has raised $28M across 2 rounds since 2015.
Pioneer Square Labs's most recent round was a Series B of $15M in Jan 2018.
Its most recent round, $15M in Jan 2018, is also its largest on record.
Pioneer Square Labs's first round on record, in Jan 2018, was backed by Techstars, Menlo Ventures and Greycroft and 10 others.
Pioneer Square Labs's latest named round is a Series B, in Jan 2018.
Pioneer Square Labs is based in the United States.
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