# Zac Stern

> Zac Stern is a New York entrepreneur and former venture investor who founded the couples app Official, sold it to Bumble in 2023 at age 25, and became its general manager. After leaving Bumble in March 2025, he pursued media and data ventures; in October 2026 he introduced mimi, a planned platform for aggregating personal data and building individual AI models.

- **Role:** Founder of mimi (announced October 2026)
- **Organizations:** Official, Bumble, Rosecliff Ventures, Oventure, Golden Egg Media, Snowbird, FlexTrip, Social Intelligence Labs, mimi
- **Education:** BS, Finance and Management & Operations, New York University, Leonard N. Stern School of Business
- **Known for:** Founded Official and sold it to Bumble at age 25., His personal website records more than 1.5 million Official installs and 300,000 monthly active users; these are historical, self-reported figures., His personal website credits him with leading more than $1.1 million in angel investments through Oventure.

## Career timeline

- **2017** — Worked as an analyst at Rosecliff Ventures, according to his professional profile.
- **2019** — Worked at Rosecliff Ventures; a long-distance relationship while studying in London supplied the initial idea for Official.
- **2020** — Graduated from NYU Stern; began building Official in May, incorporated in August and left the venture firm in October, according to his retrospective account.
- **2021** — Official experienced viral demand, technical failures and a rebuild; a December account reported a financing round of nearly $500,000.
- **2022** — Stern later reported approximately 100,000 downloads on September 19.
- **2023** — Bumble acquired Official; Stern became founder and general manager within Bumble.
- **2025** — Left Bumble in March, according to his April 2026 newsletter. Official was discontinued in the second quarter. Worked on Golden Egg Media, Snowbird and FlexTrip.
- **2026** — Launched K Factor in April, introduced Social Intelligence Labs in May and announced mimi on October 1.

## Achievements

- Founded Official and sold it to Bumble at age 25.
- His personal website records more than 1.5 million Official installs and 300,000 monthly active users; these are historical, self-reported figures.
- His personal website credits him with leading more than $1.1 million in angel investments through Oventure.

## Latest updates

- **2026-10** — Introduced mimi on October 1 as a platform being built for personal-data requests, aggregation and individual AI models.
- **2026-10** — On October 8, expanded his vision for personal-data agency in an essay titled Is the future of AI intrapersonal?
- **2026-05** — Introduced Social Intelligence Labs, focused on interpreting public social-platform behavior.
- **2026-04** — Launched K Factor and described his March 2025 departure from Bumble and subsequent ventures.

## Links

- Website: https://www.zacstern.co/
- LinkedIn: https://www.linkedin.com/in/zachary-stern/
- Twitter/X: https://twitter.com/sternzac
- Instagram: https://www.instagram.com/zacstern/

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Profile page: https://yespress.io/zac-stern
Published by YesPress — https://yespress.io
Last updated: 2026-10-23