# Mike Ajnsztajn

> See profile and contact details. Updated Oct 2026.

- Last updated: Oct 2026
- LinkedIn: https://www.linkedin.com/in/mikeajnsztajn/

A serial entrepreneur and angel investor with vast international experience, fluent in five languages, Mike has worked on four continents and likes to face the challenge of starting businesses and making them prosperous. Mike divides his time between São Paulo and New York, always looking for new opportunities.An investor in various angel groupsin the USA since 2007, Mike is a Startups Specialist: he is co-founder of ACE and co founder of GVAngels, an angel investors group of GV alumni.Previously, Mike was Co-founder and CEO of Zuppa (the first Brazilian restaurant booking site), founder and CEO of Astralis Biotechnology (focused on the research and healing of Psoríases, based in the United States) and Co-founder and CEO of Blowtex one of the most important brands of condoms in Brazil). Graduated in business administration from FGV.

## Contacts

5 contacts available for Mike Ajnsztajn: work email, personal email, work phone, personal phone and socials. Sign up free to unlock them: https://app.shizune.co/sign-up/investor-profiles/find-email/mike-ajnsztajn?utm_source=investor_profile

## FAQ

### How do I contact Mike Ajnsztajn?

Public channels for Mike Ajnsztajn include LinkedIn. For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.

### Is Shizune's investor data accurate?

Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Oct 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.

# About Shizune
Shizune.co is an investor database. Core features:
- 48,091 startup investors (angels, VCs, accelerators, and others)
- Email, phone, LinkedIn (for intros), socials, and other contact data
- Updated daily from public funding news
- CSV and Excel export

The User can access the full database FOR FREE after signing up: shizune.co