Productivity

Neptyne

Website

Neptyne is the first natively programmable spreadsheet, with a full Python environment, just like a Jupyter notebook. And we built in AI to make it easy to use, even if you’re not a Python expert. Neptyne turns anyone who can use Excel into a programmer. At Google, Douwe launched products to millions in Search, Mobile and workplace. He founded m

Founded 2022Origin source ↗Checked 2026-09-15

Overview

Neptyne is the first natively programmable spreadsheet, with a full Python environment, just like a Jupyter notebook. And we built in AI to make it easy to use, even if you’re not a Python expert. Neptyne turns anyone who can use Excel into a programmer.

At Google, Douwe launched products to millions in Search, Mobile and workplace. He founded multiple startups, and published a book on deep learning. 4 years ago Douwe rejoined Google, where he met his cofounder Jack and the rest of the team.

Neptyne launched on Hacker News in February 2023, and since then users have made thousands of spreadsheets. People have built everything from option trading systems to machine learning classifiers using Neptyne.

Company description As recorded 2026-11-08
LinkedIn
ProductivityCopilot & assistantBusinessesIndividual professionalsSubscription

Founders & team

Douwe Osinga

Founder

"Solving hard problems using software that lead to real products used by lots of people" Founder of 4 companies, ex-Google. Like travel and living in different countries.

LinkedIn X
Founder profile As recorded 2026-09-15

Jack Amadeo

Founder

Jack is cofounder and CTO of Neptyne (W23), the programmable spreadsheet. Prior to Neptyne, Jack worked at Sidewalk Labs building generative design for cities, at Compass building the real estate platform for the 21st century, and at Bloomberg building communication systems. Jack is a New England native who now lives in Brooklyn with his wife and son, and likes to sometimes run marathons.

LinkedIn X
Founder profile As recorded 2026-09-15
4team members reported
Source-reported As recorded 2026-09-15

Founded 2022 · Source

News & product activity

Sources & observations

Y Combinator

Profile depthverified profile
Website observationwebsite reachable
Last website check2026-11-11
Location · source statedNew York City, NY, USA
Pricing evidenceNo pricing page confirmed
Maturity: Not assessed · 3 of 6 areas documented

Source-based assessment · automated evidence rules

The source reports an inactive or acquired company; current product identity needs review.

Maturity is an evidence-based assessment, not a success rating. It may understate the current stage where evidence is limited. Coverage records documented areas, not a complete or independently audited company history.

Stage definitions
independent websitesource corroborationreachable websitedescriptive evidenceclassified market and modelsourced peoplesourced founding year
startup.observe Directory coverage · Sources & method