Josh Rosenthal is a General Partner and Portfolio Manager at Polychain Capital. He works with a firm that invests in various technology sectors.
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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.
Send your deckJosh Rosenthal is a General Partner and Portfolio Manager at Polychain Capital. He works with a firm that invests in various technology sectors.
Josh Rosenthal invests through Polychain Capital, which writes checks of $1M to $30M+ at seed, series a, series b.
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.