Josh Rosenthal

General Partner & Portfolio Manager atPolychain CapitalCalifornia

Josh Rosenthal is a General Partner and Portfolio Manager at Polychain Capital. He works with a firm that invests in various technology sectors.

What Josh can write

Writes checks of$1M to $30M+
Comes in atSeed, Series A, Series BCan lead the round
Ownership target7-10%At first check
Email the firm[email protected]The firm's own inbox for founders.

Polychain Capital writes $1M to $30M+ checks, larger than 83% of firms in the atlas.

Bars: how many firms report each check band. Highlighted: Polychain Capital.

Focus

Crypto & Web3Artificial IntelligenceFintechCybersecuritySoftware & IT

Also at Polychain Capital

Partners like Josh

At firms with a similar stage, sector and check size.

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One email when Josh's firm raises a fund, adds a partner or shows new activity.

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Raising a pre-seed or seed round? We write $1M to $5M first checks and help founders with distribution. A partner reads every deck.

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Questions

Who is Josh Rosenthal?

Josh Rosenthal is a General Partner and Portfolio Manager at Polychain Capital. He works with a firm that invests in various technology sectors.

How much does Josh Rosenthal invest?

Josh Rosenthal invests through Polychain Capital, which writes checks of $1M to $30M+ at seed, series a, series b.

How do I pitch Josh Rosenthal?

Email [email protected], the firm's inbox for founders, and name Josh in the subject. A warm intro from a founder Polychain Capital backed works better.

Last updated 2026-10-15. Is this you? Ask for a correction.