Pioneer Square Labs (PSL) is a Seattle-based startup studio and venture capital fund founded in 2015. It builds technology companies from scratch through its studio program and invests in early-stage, tech-driven companies primarily in the Pacific Northwest across B2B, consumer, fintech, sustainability, and digital health.
Deal activity increased 50% year-over-year (3 deals in the last 12 months). Their most common stage is seed (58% of deals). Average disclosed round size is $8.9M (across 29 rounds with reported amounts).
Portfolio
31
Fund Size
$100M
Top Stage
Seed
Last 12 Mo
1
Team
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
33 investments
| Company | Round | Amount | Date |
|---|---|---|---|
| BBluePill | Seed | $6M | Nov 2025 |
 Dropzone AI | Series B | $37M | Jul 2025 |
 Zucca | Seed | — | Jul 2025 |
 Outgo | Series B | $15M | Sep 2024 |
 Archera | Series B | $17M | Jul 2024 |
 Overland AI | Seed | $10M | May 2024 |
 Enzzo | Seed | $3M | Mar 2024 |
 Felix Fido | Pre-Seed | $4M | Mar 2023 |
 Starfish Space | Series A | $14M | Mar 2023 |
 LifeAt | Unknown | $3M | Feb 2023 |
 Maximal Learning | Seed | $5.7M | Jan 2023 |
 TrovaTrip | Series A | $15M | Sep 2022 |
 Sofy | Seed | $7.8M | Aug 2022 |
 Satellite.im | Seed | $10.5M | Jan 2022 |
 Dance Church | Seed | $4.7M | Oct 2021 |
 Copper Banking | Seed | $13.3M | Oct 2021 |
| Starfish Space | Seed | $7M | Sep 2021 |
 SecureSave | Seed | — | Jan 2021 |
 Recurrent | Seed | $3.5M | Dec 2020 |
 Boundless | Series A | $7.8M | Mar 2019 |
 Tin Can | Seed | — | — |
 JOON | Seed | $6M | — |
 NextStep | Seed | $2.1M | — |
 Mudstack | Unknown | $4M | — |
| KKamiwaza | Pre-Seed | $2.5M | — |
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Top Co-Investors
Ascend3 shared
MaC Venture Capital3 shared
Trilogy Equity Partners3 shared
Voyager Ventures2 shared
Madrona Venture Group2 shared
Earlybird Venture Capital2 shared
NFX2 shared
Wireframe Ventures2 shared
Founders' Co-op2 shared
Honeystone Ventures2 shared
GSV Ventures2 shared
Owl Ventures2 shared
Y Combinator2 shared
Shasta Ventures1 shared
Cubit Capital1 shared
Point72 Private Investments1 shared
Greylock Partners1 shared
Decibel1 shared
In-Q-Tel1 shared
Story Ventures1 shared
Last updated: 9 September 2026