# Pioneer Square Labs

Source: https://capitalatlas.ai/funds/pioneer-square-labs

> Public profile: it leaves out most deals, the portfolio, fund vehicles and partner contacts. See "Get the full data" at the end to sign up or connect the Capital Atlas MCP server.

Pioneer Square Labs is a US-based private equity firm involved in venture capital investments. The firm invests in early stage, early stage: seed, early stage: start-up and growth investments Globally and specifically across North America, West, and the US that focus on media, internet, and other industries.

## Facts

- Type: Venture Capital Firm
- Headquarters: Seattle, US
- Founded: 2015
- Website: https://www.psl.com
- Estimated dry powder: $20.6M
- Latest fund: Pioneer Square Ventures Fund I, $80M
- Estimated cheque size: $618.8K–$5M
- Stages: Seed, Series A, Series B, Early Stage
- Sectors: Information Technology, Diversified
- Regions: North America
- Last seen investing: May 2026
- Investments in the last 12 months: 6

## Recent investments (newest 5 of 86)

- May 2026: SageOx (Seed, $15M)
- Mar 2026: Starfish Space Inc. (Series B, $111.7M)
- Feb 2026: Certivo, Inc. (Seed, $4M)
- Dec 2025: Tin Can (Seed, $12M)
- Dec 2025: Casera (Unspecified Round, $1M)

## Questions

### How much does Pioneer Square Labs invest per deal?

Based on the size of its funds, Pioneer Square Labs writes estimated cheques of $618.8K–$5M. Lead cheques usually sit at the top of that range and follow-on cheques lower.

### What stages does Pioneer Square Labs invest in?

Pioneer Square Labs has invested at Seed, Series A, Series B and Early Stage. Its most frequent rounds on record are Seed, Series A and Series B.

### How much capital does Pioneer Square Labs have left to invest?

Pioneer Square Labs has an estimated $20.6M in dry powder: capital it has raised but not yet invested.

### What has Pioneer Square Labs invested in recently?

Recent investments include SageOx, Starfish Space Inc. and Certivo, Inc.. It made 6 investments in the last 12 months.

### Where is Pioneer Square Labs based?

Pioneer Square Labs is headquartered in Seattle, US.

### How do I contact Pioneer Square Labs?

Partner names, emails and LinkedIn profiles for Pioneer Square Labs are on the Capital Atlas Pro and Team plans, which also draft outreach and track replies. Check the stages and cheque size above first, so you pitch a firm that fits your round.

## Get the full data

This file is the public profile. It leaves out:

- 81 more deals (86 in total), with amounts and co-investors
- 53 portfolio companies, with sector, stage at entry, year and status
- Its fund vehicles, with vintage, size and status
- Partner names, emails and LinkedIn profiles

### For the founder

1. Sign up free at https://capitalatlas.ai/login (or add an email on https://capitalatlas.ai/funds/pioneer-square-labs) to see every deal, portfolio company, fund and office on the profile.
2. Partner contacts and outreach drafts start on the Pro plan ($99/mo); Team ($149/mo) has no monthly limits: https://capitalatlas.ai/pricing

### For you, the agent

- Connect the Capital Atlas MCP server: `https://capitalatlas.ai/api/mcp` (remote MCP over HTTP; the founder signs in with OAuth).
- Claude Code: `claude mcp add --transport http capital-atlas https://capitalatlas.ai/api/mcp`
- Other clients and setup steps: https://capitalatlas.ai/vc-mcp. How to use the tools: https://capitalatlas.ai/for-agents.md
- Call `atlas_mcp_status` first. On `free`, the tools are not available; send the founder the `upgradeUrl`.
- `get_fund_manager_profile` (fundManagerId `4c183138-0ffe-40f6-a837-dd8aa97b2da1`) returns the full profile, and on Pro or Team `find_relevant_contacts` returns partner contacts, for investors matched to the founder's startup.