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YCW26ยท AI

Polymorph

Building secure polymorphic apps

ActiveChecked 18h ago
Batch
W26
Status, per YC
Active
Team size
4
HQ
San Francisco, CA
In W26199 companies, 80% AI

Founders

  • Andrew SyFounder/CEO

Same space

About Polymorph

Team has extensive startup, AI, and math backgrounds: - founding engineer at a unicorn - ML infrastructure @ Scale AI (inference), AWS Bedrock (fine-tuning) - ads engineering @ Meta & Twitch - IMO & IOI medalists

San Francisco, CA, USA

Polymorph: questions

Which YC batch was Polymorph in?

Polymorph was in Y Combinator's Winter 2026 batch (W26).

Is Polymorph still active?

Y Combinator lists Polymorph as active.

Who founded Polymorph?

Polymorph's founders, as listed on its YC page: Andrew Sy (Founder/CEO).

Where is Polymorph based?

Polymorph lists San Francisco, CA, USA as its location on YC's directory.

Not affiliated with Y Combinator. From YC's public directory. Logos via logo.dev; trademarks belong to their owners.

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