Sean Mahsoul

Active Investor

Founding Partner and Investor at Polymath Capital

San Francisco, California

LinkedIn

Sean Mahsoul, Founding Partner and Investor at Polymath Capital is an active investor based in San Francisco, California. This profile covers what Sean Mahsoul backs, at which stage, and how founders can reach out in 2026.

Sean Mahsoul is a Founding Partner and Investor at Polymath Capital and a Partner at Presidio Legal, specializing in startups and venture-backed companies.

Sean Mahsoul invests in SaaS & Enterprise and LegalTech, typically at Early Stage Venture.

Location
San Francisco, California
Typical check
$500K

What does Sean Mahsoul invest in?

Investor type
VC
Stages
Early Stage Venture
Invests in
SaaS & EnterpriseLegalTech

Where is Sean Mahsoul based?

Sean Mahsoul is based in San Francisco, California.

How to reach Sean Mahsoul

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About this profile

This profile is part of Round Funded, an investor database and outreach platform for founders. It covers 60,000+ active VCs, angels, family offices and accelerators with verified contacts, lets you send pitches from your own Gmail, and includes a free Data Room for your raise. How this data is built.

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Round Funded. "Sean Mahsoul." Round Funded investor database, updated September 22, 2026.

Stable URL, it will not change: https://www.roundfunded.com/en/investor/sean-mahsoul

Frequently Asked Questions

Who is Sean Mahsoul?

Sean Mahsoul, Founding Partner and Investor at Polymath Capital is an active investor based in San Francisco, California. Sean Mahsoul invests in SaaS & Enterprise and LegalTech, typically at Early Stage Venture.

What does Sean Mahsoul invest in?

Sean Mahsoul invests in SaaS & Enterprise and LegalTech, typically at Early Stage Venture. Match your sector and stage, then reach out with a personalized pitch.

What stage does Sean Mahsoul invest at?

Sean Mahsoul typically invests at Early Stage Venture. Lead with traction that fits the stage when you reach out.

What is Sean Mahsoul's typical check size?

Sean Mahsoul typically writes checks around $500K. Use it as a signal for whether your raise fits their stage.

Where is Sean Mahsoul based?

Sean Mahsoul is based in San Francisco, California.

How do founders reach investors like this?

Round Funded lists active investors with verified, professional contact details for signed-up founders. Filter by sector, stage and location, then send a personalized pitch from your own inbox.

What is Round Funded?

Round Funded is an investor database and outreach platform for startup founders. It lists 60,000+ active investors with verified contacts, filtered to recent investment activity, and lets founders send personalized pitches from their own Gmail, track replies, and share a free Data Room. Round+ starts at $99 per month with a 3-day trial.

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