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Sinter

YC F26

El Segundo, US · Founded 2025 · 2 employees · 1 known investors

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Sinter operates a US-based plastics manufacturing pipeline using additive technologies, helping hardware teams move from 3D-printed prototypes to production parts on week-scale timelines.

Also known as Sinter System, Inc.

Advanced ManufacturingRobotics3D PrintingManufacturingAdvanced MaterialsUnited States of AmericaAmerica / Canada

Founders & leadership· Y Combinator alumni (F26)

Sinter was founded in 2025 by Oliver Johnson and Justin Kwon.

OJOliver Johnson
Oliver JohnsonCEOFounder and CEO of Sinter.
JKJustin Kwon
Justin KwonCOOFounder and COO of Sinter, which works on speeding up plastics manufacturing. He previously worked in mechatronics at Shinkei Systems on robotic fish processing and as a software engineer at Manifold Labs on FSDP model training.

Investors · 1

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Companies working in the same space as Sinter.

Legal entities · 1

corporate structure
Sinter System, Inc.

Frequently asked questions

What does Sinter do?
Sinter operates a US-based plastics manufacturing pipeline using additive technologies, helping hardware teams move from 3D-printed prototypes to production parts on week-scale timelines.
Who founded Sinter?
Sinter was founded by Oliver Johnson, Justin Kwon in 2025.
Who are Sinter's investors?
Sinter's investors include Y Combinator.
Where is Sinter headquartered?
Sinter is headquartered in El Segundo, US.