Pioneer Square Labs
Pioneer Square Labs (PSL) is a Seattle-based startup studio and venture capital fund established in 2015. The company combines a startup studio, PSL Studio, with an early-stage venture capital fund, PSL Ventures, to foster innovation in technology startups, primarily in the Pacific Northwest. Founded by Greg Gottesman, Ben Gilbert, Geoff Entress, and Mike Galgon, PSL specializes in software development, mobile technology, and internet startups. PSL operates a high-velocity startup studio model that transforms ideas into venture-backed companies. It provides comprehensive support, including pr
Investing activity
Pioneer Square Labs appears in 2 AI deals tracked by the AI Lounge deals desk, rounds totalling $15M. The rounds are mostly Seed, with a median round size of $15M. The most recent are SageOx (Seed, $15M, May 2026) and Certivo (Seed, $4M, Feb 2026).
Pioneer Square Labs most often invests alongside Canaan Partners, Founders' Co-op, A Capital and A.Capital Ventures, and the companies it backs on AI Lounge are mostly in AI.
Deals
Frequently asked questions about Pioneer Square Labs
What AI companies has Pioneer Square Labs invested in?
Pioneer Square Labs's AI investments include SageOx and Certivo. The 2 rounds on AI Lounge are listed on this page with amounts, dates and co-investors.
Where is Pioneer Square Labs based?
Pioneer Square Labs is based in Seattle, Washington, United States.
What stage does Pioneer Square Labs invest at?
In the rounds tracked on AI Lounge, Pioneer Square Labs has invested at Seed, with a median round of $15M.
Who does Pioneer Square Labs co-invest with?
Pioneer Square Labs's most frequent co-investors on AI Lounge are Canaan Partners (1 deal), Founders' Co-op (1 deal), A Capital (1 deal), A.Capital Ventures (1 deal) and Suffolk Technologies (1 deal).
How can founders reach Pioneer Square Labs?
Founders on AI Lounge can see Pioneer Square Labs's contact details in AI Investor Contacts (paid plans), check for a warm introduction through members who worked with the firm under Warm Paths, and add Pioneer Square Labs to their Investor Pipeline to track the conversation.